Collet chucks for machine tools and micro drills: drawings, videos

Method No. – Idea with antiperspirant

Well, the last version of a homemade mini drill that we would like to provide to readers is using a cassette motor and an antiperspirant container.
The advantage of this model is that it is controlled by a separate on/off button and has a convenient housing. Such a homemade product will be powered by a conventional power supply, which must be selected based on the characteristics of the motor. So, first you will need to prepare the following materials:

motor from a tape recorder;
suitable collet with drill;
used antiperspirant;
RCA socket for connecting power and a mating part for it;
power unit;
switch from an old carrier.

The first step is to make a mini drill according to the instructions provided at the very beginning: place the collet on the shaft and secure it with bolts. Next, the motor housing is installed in the antiperspirant. As you can see from the photo, the dimensions are ideal for installing the part. If the motor has free movement inside the housing, secure it with electrical tape and hot glue.

After this, you need to drill a hole in the top cover for the exit of the collet or the drill itself. At the same time, you need to make a hole in the bottom for the power connector. Using a utility knife, you also need to cut out a window for the switch, then solder all the elements of the circuit in series and install them in a place convenient for you.

Review of various creation ideas

GENERAL PROVISIONS

The development of an array of technological equipment for metal-cutting machines means the formation of machine tools according to technological, design and organizational characteristics that are necessary and sufficient to equip technological processes or individual technological operations with them.

This set of regulatory documents considers three options for creating an information array of technological equipment used on metal-cutting machines:

IPS for automated selection of equipment at the design stage of technological processes, taking into account economic indicators reflecting costs and labor intensity in the design and manufacture of equipment (IPS-I);

IPS for automated selection of analogue devices from an array of previously designed ones (IPS-II);

IPS for semi-automatic selection of equipment based on expert assessments (IPS-III).

Great Encyclopedia of Oil and Gas

Self-centering chucks and mandrels constitute a special group of multi-link mechanisms.

Self-centering chucks are produced in 4 accuracy classes: a) for universal work - normal accuracy N and increased accuracy P; b) for finishing work - high B and especially high A.

Self-centering chucks for drilling machines do not require increased precision in the diameter of the jaws, as well as their exact location relative to the center of the chuck. They are installed on the machine along a clamped reference part and, as a rule, are used only for the first operation of processing the part without tool guides. And table 13 shows the normals of such cartridges.

Movable steady rest.

Self-centering chucks are convenient for securing round symmetrical parts.

Self-centering chucks, as a rule, have three jaws (Fig. These chucks are called spiral bevel gear chucks, since the movement of the jaws / occurs using a spiral 2 and a bevel gear.

Self-centering chucks (collet and jaw) are designed for fastening relatively small tools: collet chucks - for tools with a shank diameter from 2 to 15 mm; three-jaw chucks – for drills with a diameter from 0 5 to 15 mm.

Self-centering chucks ensure precise centering of taps, which is especially important when cutting precise threads. There are two main types of self-centering threading chucks: collet chucks and ball chucks.

Self-centering chuck for drilling machines.

Collet chuck: device, design, operating principle and clamping action

A collet chuck is a type of lathe chuck. They hold the part while it is processed at high speed. There are several types for different part shapes, types of processing and purpose. A collet chuck, unlike quick-release chucks, does not require additional devices: pins, screws or stoppers. Therefore, its second name is self-clamping. This simple and reliable device is widely used in lathe equipment. The most common type of collet is ER.

How to install a metal-plastic water supply using collet clamps

In everyday life, metal-plastic pipes have noticeably replaced similar products made from all other materials. Plumbing installation using crimp connections has become the most common of all plumbing operations. It is carried out in the following sequence:

A measured section of a metal-plastic pipe is separated using special scissors or another tool in such a way that the cut is made relative to the axis strictly at a certain angle - 90º. A calibrator is used to straighten the crushed end (restoring the cut profile) and chamfering. The resulting chips and debris are removed. The straight collet fitting is immediately disassembled from both ends by unscrewing the locknut from the threaded end and removing the O-ring from the fitting. After disassembly is completed, first put the nut on the pipe, and then the O-ring. The end around the fitting is lubricated with silicone. The pipe is put on the fitting, pressing against the end of the fitting as tightly as possible. The operation requires care so as not to damage the O-rings. The connection must be securely fixed. The required fixation is achieved by moving the o-ring to the end of the crimp connection and screwing the locknut onto the thread

The locknut is screwed on, being careful not to allow the sealing ring to be squeezed out. The first turns are made without the use of tools

The wrench is used with the fitting immobilized until a characteristic creaking sound is heard. When these sounds occur, the wrench is put aside so as not to damage the rather fragile locknut.

Installation of metal-plastic water supply using collet clamps

By avoiding damage to the O-rings and locknut, it is possible to achieve a tight seal of the crimp connection. Disassembling it will also not be difficult.

Homemade collet coupling of the simplest design

The simplest collet, operating on the principle of a coupling, can be made of steel wire with a diameter of 1 mm. It should be borne in mind that the collet of the proposed design is not a universal clamping device and can only be used for drills of the same diameter

It is important that the transverse size of the drills used corresponds as closely as possible to the diameter of the output shaft of the drive motor. In addition, it is important to consider that such a collet can only be used when drilling materials with low viscosity

Homemade wire clamp

To manufacture a collet coupling of the proposed design, the following consumables, fixtures and tools will be required:

a cylindrical metal blank, the diameter of which corresponds to the diameters of the output shaft of the electric motor and drill;
steel wire;
electric soldering iron;
soldering flux.

The process of manufacturing a collet chuck for a microdrill is carried out according to the following algorithm:

The wire is wound onto a blank so that a rigid spring is formed

It is important that the spring coils are located as close to each other as possible. The finished spring is carefully soldered without removing it from the blank. The simplest collet clamp for a microdrill can be made with your own hands and in a different design

The design of such a cartridge, the manufacturing cost of which will be very low, consists of two halves fastened with a screw. On the inner surface of each of these halves, cylindrical grooves are machined, which, when tightening the screw, ensure fixation of both the clamp on the drive motor shaft and the tool used. If you decide to make such a collet clamp with your own hands, keep in mind: in order for it to work correctly, you must balance it before using it.

The simplest collet clamp for a microdrill can be made with your own hands and in a different design. The design of such a cartridge, the manufacturing cost of which will be very low, consists of two halves fastened with a screw. On the inner surface of each of these halves, cylindrical grooves are machined, which, when tightening the screw, ensure fixation of both the clamp on the drive motor shaft and the tool used. If you decide to make such a collet clamp with your own hands, keep in mind: in order for it to work correctly, you must balance it before using it.

Homemade clamp based on a collet pencil

How to make a chuck for a mini drill

Everyone knows that a drill is a very useful and versatile tool on the farm. If you have a drill at home, you can hang a picture on the wall, straighten furniture, and repair a number of necessary items. But what should you do if you don’t have a drill at home, and constantly asking your neighbors is somehow inconvenient?

You can buy it in a store, but this device is very expensive. Or you can assemble a mini-drill with your own hands using scrap materials that are found in almost every home. We will tell you how to do this in this material, presenting to your attention several simple ways to assemble a mini-drill with your own hands at home.

Mini drill made from an electric chuck

The first option for assembling this device with your own hands is based on the use of an electric socket , which can be purchased separately, or taken from a light bulb. If you buy it, it is very inexpensive, but the cost will be justified.

Also, to assemble a mini-drill with your own hands from a chuck, you will need the following things:

motor;
a jar of soap bubbles;
construction knife;
insulating tape;
hot glue;
blowtorch;
household switch.

Mini drill body and core

Work must begin by preparing the body of the mini-drill, which will serve as a soap bubble jar . This is done like this:

Prepare a jar lid. To do this, heat up the soldering iron and use it to make a small hole in the lid of the jar.
The diameter of this hole should be slightly larger than the diameter of the drill base.
The bottom of the jar must be completely cut out.

Let's start working with the core:

We connect the cartridge with the motor. Most often, motors are taken from different tools that have already been used.
Before the bonding process, the motor must be completely degreased using acetone.
The cartridge can also be degreased, but there is no need to water it like a motor with acetone. Regular wiping will be sufficient.

The fastening method occurs through cold welding . If this method does not suit you, you can also use hot glue. Remember that the more complex your future mini-drill, the more materials you will need to assemble it yourself.

When planting with welding or glue, you need to work extremely carefully so that everything turns out as smooth as possible. It will not be possible to redo the work later, keep this point in mind.

You also need to consider the following:

at the mounting location on the cartridge there is a hole that needs to be covered before connecting the parts;
putty is carried out using simple plasticine;
Only the holes should be filled with plasticine; there should not be any left on top of the cartridge.

Manufacturing process

When you have prepared the body and core, you can begin directly assembling the drill with your own hands:

Place the cartridge with the motor connected to each other in the jar. This must be done so that the wires that stick out from the socket are then placed in the lid of the jar.
When the cartridge fits completely into the jar, lock it. To do this, fill the voids on the sides with hot glue and wait until it sets completely.
Attach the switch to the cover and connect the power wires to it. It can also be placed on glue.
We connect all the wires to the switch; the connection diagram is standard. You can use an ammeter for accuracy.
After connecting the wires, they need to be insulated using electrical tape or hot melt adhesive.
Screw the lid onto the jar and attach the drill to the other side.

The good thing about a ready-made mini-drill is that it can run on both batteries and electric power. We considered the option of assembling a universal model .

Naturally, without having the skills to work with electricity, it will be extremely difficult to assemble such a drill with your own hands. Below we suggest you consider options for assembling simpler drills for small household needs.

How to assemble a drill with your own hands based on the handle body

One of the options for the simplest drill is a homemade device based on a regular ballpoint pen.

To make it you will need the following materials: ballpoint pen ; drill with the required diameter; hot glue; a durable stick with handles at the end that can be used to rotate it.

Pay special attention to the choice of handle for the manufacture of a future drill, and specifically to its body, since during operation the main load will fall on the body.

The requirements for the handle body are:

it must be as strong as possible to withstand loads;
the best option is a body made of high-quality metals;
If there is no pen with a metal body, choose a pen with a thick plastic base.

The build process looks like this:

Disassemble the handle until only one body remains.
The lower part of the body, where the writing rod usually sticks out, needs to be unscrewed.
Instead of this part, insert a drill into the body in such a way that its working part sticks out from under the lower part, and the second part is inserted into the hole that is in the stick.
The stick is inserted into the body at the same time as the drill.
To ensure that the structure of the drill is complete, it is fixed to the wall of the housing using hot-melt adhesive.
When you twist the mechanism using the special handles, the drill will rotate, providing the desired work by pressing the handle body.

Making a drill using a toothbrush

Electric toothbrushes are very convenient to use, but impractical in the sense that the bristles on them cannot be changed and after use, this expensive device, like a simple brush, has to be thrown away.

But you don’t have to do this, using the body of an electric brush to make a drill with your own hands.

We take an old electric brush and cut everything down to the body. Next, you need to connect the motor shaft to the drill using a collet clamp, which must be purchased separately.

When purchasing a collet clamp (or chuck), be sure to find out in advance what the diameter of the motor shaft in the brush is. The motors differ from each other in the diameter of the mounted shaft.

The collet clamp is inexpensive and can be purchased on the radio market or in a specialized online store. It includes a chuck and interchangeable drill bits with different diameters that are inserted into the chuck.

The most difficult thing in this case is to put a collet clamp on the brush motor. The cartridge is designed for a shaft of 2 mm, but the motor here has a smaller one. To do this, each screw for fastening must first be sharpened until it is given a cone-shaped shape so that the minimum diameter of the cartridge mount can be adjusted to the diameter of the motor shaft.

Of course, you can assemble a mini-drill with your own hands not only using brushes or old handles , but also other devices; folk craftsmen come up with new ways to assemble them every day. However, the options discussed above are suitable even for those who have never encountered anything like this and are assembling such devices for the first time in their lives.

Alexander Romanovich Chernyshov
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Do-it-yourself collet chuck: components and manufacturing procedure

The question of how to make a collet clamp with your own hands is relevant for those who are engaged in jewelry making, engraving or printed circuit board manufacturing and use such equipment. It is specialists in these categories who most often encounter breakage of the collet clamp, which can be replaced with a new production model or made with their own hands.

Homemade collet chuck turned on a lathe

There are several options for making a collet chuck with your own hands, each of which has certain nuances. However, no matter what method is used to make a homemade clamp, its price will compare favorably with the cost of a serial model.

Homemade collet coupling of the simplest design

The simplest collet, operating on the principle of a coupling, can be made of steel wire with a diameter of 1 mm.

It should be borne in mind that the collet of the proposed design is not a universal clamping device and can only be used for drills of the same diameter.

HOMEMADE DRILL HOLDER

Quite by chance, I noticed that the length and internal size of the plastic cap from a glass bottle coincided with the length and external size of the electric motor from an inkjet printer, which had long claimed to turn into a miniature hand drill. On the first free evening, I disassembled the plug (it’s easier to have and use two - we break the body of one and take out the inner part, in the second, on the contrary, we save the outer part when disassembling) and adding everything with a front fastening washer, a “tulip” connector and wires, I got the following design:

Which I assembled into a single whole using two screws and three small self-tapping screws.

Adding to this a power supply wire and a specially purchased collet for attaching drills with a diameter of 0.7 to 1 mm. But the seller’s assurances did not come true; the drill collet did not fix a diameter of less than 1 mm.

However, the prospect of “bending” under the pressure of circumstances is not very attractive, and therefore, having strained my brain, I decided to try the following:

The diameter of the “nose” of the syringe on which the needle is installed is slightly smaller than the diameter of the electric motor shaft (2.5 versus 3.2 mm), but the problem can be corrected.

I took a 3 mm drill, increased the diameter, cut what was needed from the body and forcefully pressed it onto the shaft. and nothing happened. The needle did not fit in place, the alignment of the mounted element did not stand up to criticism.

Then I took drills of the following diameters - 2.6 mm, 2.8 mm, 3 mm, 3.1 mm and, with their help, gradually enlarged the hole from the inside of the case.

I slightly modified the hole with a round needle file.

With a little effort, I put the adapter on the shaft and carried out external finishing.

He heated the medical needle over the fire and pulled it out from the installation site with pliers.

The diameter of the extracted needle, 0.7 mm, corresponded to the diameter of the drill being installed, but its shank entered the resulting hole only after applying quite sufficient force.

The next drill had a diameter of 0.8 mm, for which a needle with a corresponding diameter of 0.8 mm (blue plastic) was also found, but for a drill with a diameter of 1 mm there was no suitable needle and the hole from the 0.8 mm needle had to be this use a drill and drill it out. However, installing it using pliers also required some effort.

Tools and materials

electric cartridge,
engine,
plastic container for soap bubbles,
sharp knife,
hot glue,
insulating tape,
soldering device,
toggle switch

Preparatory work

To make a housing in the lid of a jar of soap bubbles, use a heated soldering iron to make a hole with a diameter slightly larger than the diameter of the base of the drill. The bottom of the container must be removed. The core of the tool is made from a motor and a cartridge. An engine of suitable power can be taken from old equipment. Before attaching the engine and cartridge, they are degreased with acetone. Fastened by cold welding or hot glue.

Assembly

The work is carried out in several stages. First, the cartridge with the motor is placed in a plastic container made from soap bubbles.

The wires coming out of the electrical socket must be placed in the housing cover.

The cartridge is secured with hot glue, coating the side voids. Wait until the binder material dries.

The toggle switch is attached to the lid with glue, and the power supply wire is connected to it according to the standard circuit. If necessary, use an ammeter. Insulation is done with electrical tape or hot melt adhesive. The lid is screwed to the tube, and a drill is fixed on its reverse side.

Drill made from a toothbrush

At first glance, it sounds absurd. But we will talk about an electric brush, which has a completely reliable motor inside. It is enough to get to the steel shaft on which the gearbox with rotating bristles is placed, and the workpiece is in your hands.

The same collet chuck is put on the shaft, and batteries are installed instead of batteries. Or you can adapt a suitable mains power supply.

Drilling walls with such a device will not work, but holes in a printed circuit board will be easy. In principle, you can use any compact electrical appliance that has a conveniently located motor shaft. For example, an old electric razor.

How to make a mini drill for printed circuit boards with your own hands

The main purpose of a mini drill is to drill printed circuit boards, plastic, wood and some other non-hard materials. Compactness and efficiency have allowed this tool to become one of the main assistants for the home craftsman. Moreover, it is not at all necessary to buy a ready-made tool - a homemade mini drill copes with its duties no worse than its factory counterpart.

What can it be made from?

You can make a mini drill with your own hands by using motors from various improvised means.

Hair dryer. This option is the most preferable, since the power of the motor from the hair dryer will be quite enough for the mini drill to perform its main functions. The maximum speed of such an engine reaches 1500-1800 rpm.
Record player.
Since the power of the tape recorder motor is very small, the only thing that can come out of such an undertaking is a drill for printed circuit boards. The engine is powered by 6 Volts, which means you will have to find an appropriate charger or battery. Tape recorder motor
Fishing rod reel. A mini hand drill can be made from a regular fishing rod reel. The coil mechanism will be used as a motor and, through rotation, will drive the chuck with the drill. The advantage of this method is the ease of manufacture and the absence of the need for power from a battery or mains.

https://youtube.com/watch?v=I_wB3_gP4kc

Making a mini cartridge

In order to assemble a mini drill chuck, you need to purchase a collet - a special mechanism designed for clamping cylindrical objects. Next, you need to connect the motor to the contacts of the future battery, which will power the device during operation.

Collet clamping

If your drill is spinning in the wrong direction, swap the wire contacts.

Finding a drill of the right size is not difficult. Insert the drill into the collet body and clamp tightly. Next, the finished nozzle must be installed on the motor body. The collet should fit tightly onto the motor shaft. Otherwise, you cannot avoid vibration. The chuck for a homemade mini drill is ready.

Attachments for a homemade mini drill can be purchased at any hardware store. Before purchasing, make sure they match the diameter of the collet.

Preparing the body

As a housing for the future device, you can use either an antiperspirant container or a regular hollow tube of a suitable size. If you use a simple hollow tube as a body, you need to cut off the bottom and insert a rubber or other plug in its place. If you are making a device from an antiperspirant body, you need to drill a hole in the lid for the drill to exit.

Connecting the elements

The motor must be installed on the reverse side. If your motor is not the right size, choose another tube. The fit must be very tight to avoid vibration as the shaft rotates. After this, it is enough to tighten the bolts on the collet and connect the resulting device to the electrical network.

One of the main disadvantages of assembling a drill with your own hands from a motor is the lower power compared to a standard device and the low strength of the drill.

If your work requires a cutter, you can easily make one yourself from an old lighter. To do this, remove the spinning drum from the lighter and place it on a bolt of a suitable size. Secure this with a nut and insert it into the collet hole. The cutter for surface treatment is ready!

If for some reason the cartridge does not fit the size of the cylindrical shaft of the motor or reel, it is necessary to degrease it thoroughly and then place it on hot glue. This will help to obtain a stable and durable structure.

Such a mini drill with purchased attachments can perform minor repairs on technical equipment, drilling plastic, thin metal, and making crafts.

Assembling a mini-drill, collet chuck, DIY Dremel from an old printer and other devices

The main advantage that a self-assembled mini-drill differs from standard products is its compact size and the ability to obtain electrical equipment without significant expenditure of money, effort and time.

It is easy to make such a homemade instrument at home, since it does not require special skills or highly complex devices.

To get a high-speed drill or other devices for making crafts, a home craftsman only needs to be comfortable with a screwdriver and pliers and be able to perform simple technical operations.

Instructions for making a drill

When making small things, decorative and other products, a compact drill, engraver and similar hand tools are very convenient, and therefore remain indispensable in the home workshop. Using such equipment, you can drill and process products made of wood, plastic, textolite and other durable materials. You will also need a micro drill when drilling printed circuit boards.

To manufacture drilling equipment, select a suitable chuck and a body of suitable dimensions (plastic container). To rotate the work surfaces, you need to select an electric motor and a power supply, for which you can disassemble an old hair dryer or other electrical equipment.

To learn how to make a mini-drill, just read the following list of recommendations:

You first need to secure the cartridge to the electric motor shaft, for which you will need adhesive materials (“cold welding”), which ensure a reliable connection between the metals.
You will have to work very carefully, since the adhesive materials set quickly, which eliminates the possibility of eliminating errors and correcting the connection.
After fixing the cartridge, it is better to cover its surface with a special heat-resistant glue, which will ensure the density and strength of the connection.
On the case you need to make a hole in advance for the switch (preferably a push-button one).
The drill will be more functional with a reverse mechanism, which is implemented using a six-pin switch.
When connecting to the power supply, you will need a 12 V power supply or a battery (2-3 pieces) with a similar voltage.

Having assembled a mini-drill into a single structure from individual parts with your own hands, you can turn on the power and do test drilling.

Assembling the collet chuck

To secure drills in a drill, you will need a special collet or chuck in the form of an adapter with clamps for the drilling tool. This mini drill chuck is attached directly to the electric motor shaft. A self-made collet clamp allows you to work with drills with a diameter of 0.7 to 3 mm. The more carefully and accurately this element is assembled, the more accurate the drilling will be.

It is important to choose the right cartridge, so if it is impossible to find a suitable option, it is better to start making it yourself. You don't need a lathe for this, because you just need to select a screw and a closed nut with an M8 thread. When assembling the cartridge, proceed in the following order:

Drill a 2mm hole in the screw head and nut.
Make axial cuts with a hacksaw.
Enlarge the holes with a 3.5 mm drill.
Grind the nut until it has a cone shape.

Having thus assembled a mini-chuck for a drill with your own hands, you can begin installing it on the drill. If necessary, select similar chucks for drills of any diameter.

DIY mini drill

Drills are used by modellers, home craftsmen and those who love making small parts or decorative elements.

The presence of a flexible shaft in such a device allows you to work with the smallest parts and process surfaces of complex shapes (grinding, polishing, cutting, applying patterns).

Assembling such a machine is as simple as making a drill with a mini-chuck for drills with a diameter of up to 3 mm. To do this, you need to find the main component - an 18 V electric motor, which can be taken from a screwdriver or blender.

The procedure will be as follows:

Disassemble the blender by removing the top cover and cover, unscrewing the mounting bolts.
Remove the electrical circuit, power cable and the part located above the rotator from the housing.
Remove the tip on the electric motor shaft, remove dirt from the housing and shaft.
Select the cartridge according to the shaft size (the most accurate way to measure the diameter is with a caliper).
Secure the microcircuit and the on/off mechanism.

The assembled instrument can be connected using a cable to a regular outlet. Rechargeable batteries or regular batteries are also suitable as a power source, which will have to be replaced periodically.

Flexible shaft for Dremel or micro drill

Rotation can be transmitted to replaceable attachments using a device such as a flexible shaft made of durable twisted wire with a protective metal coating. To assemble this device yourself, you will need a few simple things:

brass or copper tube;
bushings with metric thread M4 (2 pcs.);
metal shaft made of 5 mm electrode (M5 thread);
adapter for thread 0.75;
mini-chuck for quick fixation of the cutting tool;
metal clamp (M12 bolt with a hole along the axis);
protective covering of the connection point.

To assemble a flexible shaft, an electrode is placed in the tube and secured with bushings. On one of the bushings you need to attach an adapter with a cartridge, and on the other, install a clamping device for connection with the flexible part. After all these operations, protection made of brass or copper is secured. The chuck is equipped with a plastic handle on the clamp, which simplifies the work with the tool.

Dynamo from printer drive

You can make a micro-dynamo yourself if you disassemble your old printer. Such a portable device will be able to convert mechanical rotation into electrical energy, which arises under the influence of magnetic induction in a closed loop.

This homemade product allows you to get a simple DC generator at home, which is useful for powering small electrical appliances, charging mobile phones, tablets and other equipment.

A small dynamo can also be used for LED lighting, bicycle light connected to a single-phase circuit.

Just like a bur or a do-it-yourself microdrill, a dynamo is assembled from improvised materials that can be found at home. An example kit looks like this:

electric motor;
belt drive;
non-slip handle;
base made of wood or other durable material;
capacitors with a capacity of 10000 μF (4 pcs.) and a diode (1 pc.);
wires, fasteners, metal corner.

The only condition for successful dynamo assembly is the selection of suitable sized and fully operational components. All the parts needed for this can be found in any home printer. Before assembling the dynamo, it is better to make a drawing in advance and get a clear idea of the location of each element.

The device is assembled in the following order:

Connect capacitors in parallel.
The phases are connected to the electric motor through a diode, and the zero is connected to the motor zero.
Secure the device to the base.
Install the gear with the handle.
Tension the drive belt.

When assembling the structure and connecting the contacts, polarity must be taken into account.

Micro motor at home

Compact electric motors are used by modellers and lovers of various small crafts with electric drive.

Such a device is the most common DC electric motor with a brushless circuit.

To make this device, a vibrating platform from a mobile phone is suitable, and as a shaft you can choose a thin drill (up to 0.29 mm), on which copper wire is wound in two layers.

The procedure for manufacturing an electric motor is as follows:

Coat the winding with epoxy.
Fix the electromagnet.
Attach fluoroplastic bushings to the electromagnet.
Install the entire structure under the winding.

To be fully ready, you need to mount the valves and make the connection using a five-input microchip.

A description of what can be made from a drill or an old printer will help you assemble quite complex devices at home that are needed by craftsmen, modellers, and just lovers of crafts.

Knowing how to make a collet clamp with your own hands or make an electric motor, you can save a lot, because all these products are made from used devices and parts.

All costs are reduced only to the time allocated for assembly.

Choosing a collet chuck for a router

The most important component of a hand router is the collet clamp or collet. It serves to securely fasten the cutter in the chuck. Both the performance and safety of using the tool depend on the operation of this unit. The equipment provides maximum installation accuracy and the smallest axial runout among all similar types of fasteners.

Design
Purpose, principle of operation
Varieties
Criterias of choice

What are collets for hand routers?

Sometimes a collet clamp for a hand router is confused with a cam clamp. Their purpose is similar - to fasten the shank of working tools to a rotating spindle. But if the second is universal and makes it possible to fasten rods of different diameters (within its range), then the first is intended for fastening one, strictly defined size. Main parts of the collet:

Clamping element. Its internal hole corresponds in diameter to the shank for which it is intended. The outer dimensions of the set of collets are the same. They can be mounted in a clamping chuck and use one union cone nut.
Union nut. It can be used in common for a whole set of clamping elements.

The nuts are hexagonal, with a spanner. For small diameters they are often made cylindrical, knurled for hand tightening.

Types and features, use of cartridges

The following types of collet clamping elements are used:

Solid. The most accessible and common type. To fasten shanks and workpieces up to 3 mm, 3 petals are made, from 3 to 80 - 4, over 80 mm - 6. Due to the reduction in the clearance between them when tightening the nut, reliability increases significantly.
Detachable. Used for fixing workpieces of the smallest sizes. The cone is made up of individual spring-loaded cams. Such sets are equipped with replaceable inserts.
Conical. Designed for fastening tool shanks and workpieces that have the shape of a cone (Morse or metric).

Depending on the direction of movement of the collet petals, there are:

retractable;
retractable;
motionless.

Collet clamps are used for working tools in various machines, in universal hand-held milling cutters, and in small-sized equipment such as Dremels. They are also used to hold the workpiece during machining.

Types and principles of operation of chucks

Collet chucks are used mainly when processing cold-rolled rods or other metal products that have an already machined surface.

Structurally, cartridges can be classified according to functionality:

with a fixed mechanism;
with retractable mechanism;
with retractable mechanism.

Each design has its own characteristics. The feeding type is made in the form of a steel sleeve with 3 cuts forming petals that have a springing effect.

Drawing No. 1 of the main spindle collet

Collets type F - clamping the main spindle are used to secure the workpiece.

Drawing No. 2 of the counter-spindle collet

Collets type LN - counter spindle are produced elongated, size E depends on the standard size.

Drawing No. 3 collet type R

Type R – are pull-type collets.

Drawing No. 4 collet type T

Type T - clamping.

Drawing No. 5 collet BF

BF type feed collet - designed for bar feeding.

When installed on the machine, the feed collet is threaded onto the pipe with the help of which it is fed into the working area. It is necessary to take into account the design feature - the size and shape of the collet, which must necessarily correspond to the profile of the bar being processed.

In preparation for processing, the rod moves through the petals, which, due to their design features, tightly hold the workpiece. During processing, when feeding the workpiece, the adhesion force between the petals and the product increases due to rotation. The principle of operation of the clamping elements is based on strengthening the adhesion of the petals to the workpiece during rotation of the working mechanism. Bushings with 3 petals are used for processing products up to 3 mm, four – up to 80 mm, six – over 80 mm. Typically, collets have an angle at the apex of the cone equal to 30º.

Collets for shaft 2 mm (0.1-3 mm) for micro drill

When processing thin rods, collets equipped with springs are used to increase the clamping force of the jaws. When increasing the diameter of the workpiece being processed, designs are used that are equipped with special inserts selected according to the dimensions of the product. Collet clamps are also used when machining with a drill, cutter or tap. The sleeve is fixed in the chuck with a nut, and the cutting tool is fixed directly in the collet. When fixed with a nut, the internal volume of the hole where the workpiece is installed is reduced, thereby increasing the force holding the rod stationary.

Cartridges of this design also have their drawbacks. First of all, the requirement that the shanks of the tool used must match the characteristics of the collets used. At enterprises, the most widely used collets are the ER type, which constitute the largest number in the total volume of tools used.

When performing complex work on the manufacture of products, various collets are used, indicating all sizes and technology for performing work operations, but often it is necessary to combine equipment or make the necessary collet chuck with the required characteristics with your own hands.

Video review of a lathe collet chuck

What is a collet clamp (or chuck) and how to make one yourself?

A collet chuck is a type of chuck. Designed for clamping cylindrical workpieces with a smooth surface. Used for drilling, drilling and filler, milling, lathes and numerically controlled machines.

The main element of the collet is a sleeve with longitudinal cuts. Between the cuts there are elastic petals that hold the material when compressed. Usually one cartridge is sold with a set of collets of different diameters.

The cartridge consists of three parts - a body, a replaceable sleeve (collet) and a clamping nut. The collet has several axial slots dividing it into petals. The number of petals varies depending on the diameter of the sleeve.

The material is held in place due to the fact that the locknut transfers pressure to the conical formation, and the part is compressed by radial force. There are replaceable collets for fastening cylindrical parts, as well as polyhedron-shaped workpieces.

A collet chuck is installed on the machine shaft.

Depending on the purpose, collets are divided into three types:

Feed collet. It is a hardened steel bushing with three partial cuts. The petals are directed towards the center and are springy. The hole in the feed collet is selected with such a diameter that the part is clamped tightly. Equipped with a set of replaceable inserts, making it possible to clamp parts of different diameters and profiles.
Clamping collet. It is a sleeve with a through hole. Two attachment points are formed along the axis. The material installed in the collet is firmly fixed and held during operation. For square parts, a clamp is made with four slots, for round and hexagonal materials - with three. With a set of collets for different shapes of workpieces, you can fix a part of any shape into a chuck. The advantage of such models is almost zero radial runout.
Detachable collet. Used when processing parts with small diameters. The cams are moved apart using springs.

Application

Since each collet is designed for only one diameter, they are used when working with long metal rods on milling machines.

Also, high precision makes it possible to secure taps, cutters and wrench tips. With their help, drills of drilling and filler machines are attached.

The inner surface of the collet is polished, so the surface of the workpiece in the places where the clamp is made is not deformed.

In addition to equipment for machine tools, mini chucks are used in construction equipment. There are drills with mini chucks and routers with mini chucks.

Also, using mini self-clamping chucks, construction tools are attached to the handles. This allows you to make universal handles for several tools. Using a mini chuck attached to the end of the handle, it is convenient to change the shafts of files or screwdrivers.

The same principle is used to clamp the graphite rod in mechanical pencils. When you press the pencil button, a mini collet extends, the petals diverge to the side and the rod reaches the required length.

Advantages and disadvantages

To understand whether such a cartridge is right for you, it is important to understand its features. Self-clamping chucks have a number of advantages:

Easy to install and dismantle the workpiece. There is no need to own a set of additional tools - pins, stoppers or clamps with keys.
Clamping of small diameter parts.
Long period of operation. Due to the fact that collet chucks are made of hardened or cemented steel, they have greater strength.
The large contact surface area prevents the workpiece from spinning.
Minimal beats. In self-clamping bushings the part is well centered. This allows you to increase the accuracy of material processing. Mini vibrations of the material are usually neglected.
Versatility. Suitable for almost all types of machines.

The main disadvantage is that one collet clamp holds a part of a certain size. Therefore, it is advisable to own a set of interchangeable collets and select them for each workpiece. Adapter bushings are also used to solve this problem. They also have petals, but the shape of the bushings is cylindrical.

The sleeve is installed inside a collet of the appropriate size, and a workpiece is inserted into the hole in the adapter sleeve. The clamping nut is tightened and compresses the collet, and the adapter sleeve inside it is compressed and holds the part.

With a set of interchangeable collets or adapter sleeves, the self-clamping chuck becomes an indispensable mechanism for the machine.

DIY collet for a router

A collet chuck is a clamping device for fastening workpieces and parts with a smooth shank surface. The clamp is designed for all types of machines, including those with computer numerical control (CNC).

The main element of the part is a sleeve with longitudinal cuts, between which there are locking petals. They securely hold the workpiece during compression. The cartridges are sold with a set of collets of the most common diameters.

Device, types

Collet clamping equipment for a milling machine includes three main elements in its design:

frame;
collet or replaceable sleeve;
clamping nut.

Longitudinal axial slots on the bushing form movable petals. Their number depends on the diameter of the part. The elements are connected to each other by a lock nut, which transmits pressure to the cone formed by the petals - the device is tightened by radial force.

On the construction equipment market, there are replaceable collets with which cylindrical tools are secured . There are blanks in the shape of a polyhedron.

The collet clamp is installed on the machine shaft, after which the master performs milling, sharpening or straightening of the parts.

Depending on the function, collets are divided into three types:

Serving. The sleeve, made of hardened steel, is equipped with three partial cuts with spring tabs directed towards the center of the cartridge. The diameter of the hole in such a clamp is selected with the following condition: the workpiece must be tightly fixed in a stationary position, because in such a case every millimeter is important. The feed collet is equipped with replaceable inserts of different diameters . Then you can work with different-sized workpieces of any configuration.
Clamping. It differs from the previous sample in that it has a through technological hole with two seats along the axis of the bushing. During processing, the workpiece is tightly clamped in the collet without the risk of falling out. If the master plans to process square parts, he will need a clamp with four slots, and for round and multi-faceted parts, he will need a chuck with three slots. A set of collets for any workpiece will ensure the processing of parts of any shape . The advantage of such a tool is low radial runout.
Detachable (unclosing) secures parts of small diameter. The design of the expanding collet has springs for spreading the petals.

Each collet is designed for only one diameter, so they are suitable for working with long metal rods mounted on the router.

Read also: Gear housing for an angle grinder

Thanks to the high precision of fasteners, taps, a turning cutter or replaceable tips for screwing nuts can be attached to the collet.

The chuck is indispensable if you need to secure a drill in a manual hammer drill or drilling machine. The clamp has a polished inner surface; at the moment of fixation, deformation of the workpiece is eliminated.

In addition to machine tools, collets are used to secure replaceable parts on hand tools. Along with standard devices, there are analogues for installation on mini-drills. In carpentry workshops you can find mechanical tools with collets connecting the working part to the handle.

The miniature chuck allows, if necessary, to change the shafts of files or screwdrivers . This principle is inherent in the manufacture of mechanical pencils with replaceable graphite rods.

By pressing a button, the user extends a small collet, the petals open, and the rod extends to the specified length.

Advantages and disadvantages

Among the advantages of the device are:

ease of fixation of the workpiece and its equally easy dismantling;
possibility of securing miniature workpieces;
long service life, which depends on the material (hardened or cementitious steel);
no scrolling of the workpiece due to the large contact area;
zero radial runout, ensured by good alignment of the part in the bushing. In this way, it is possible to achieve high precision of the process.
Its versatility makes it possible to use the collet mount on all types of machines.

The only drawback of the collet is that each individual sample fixes a part of the same diameter . For example, a 12 mm collet will only fit a drill of the same size. This problem can be solved by purchasing a set of replacement clamps to match them to workpieces of all diameters and configurations.

There is an adapter cylindrical sleeve that is installed in a chuck of the required size, and the workpiece is inserted into it. The clamping nut secures the collet, and it clamps the adapter sleeve to the part.

A self-clamping chuck with a set of replaceable clamps or adapter sleeves guarantees high-quality and safe operation on any machine.

Self-production

When using a clamping chuck, you cannot do without a milling machine: you will have to grind out the body, collet and clamping locknut. The best material to use is steel 50 HFGA.

The body is made from a steel blank of the required size, in the center of which a hole with internal thread is made for installation on the machine spindle.

The housing is mounted on a turning shaft to turn the internal cavity for the collet and form an external thread for the clamping nut.

Read also: Gates made of forged elements

The locknut is made from a suitable blank, in which a through hole is drilled, bored and threaded with the same diameter as on the body.

The workpiece for the collet is ground, a hole is drilled, then a cone is made and cuts are made along it. To ensure that the part meets quality requirements, its internal surfaces are carefully polished . To extend the service life of the homemade product, the metal parts are hardened.

Brass or bronze collets have proven themselves to be quite good, but the price of the starting material is higher.

Homemade collet chuck turned on a lathe

Jaw chuck for micro drills as an alternative to collet chucks

In order not to think about how to make a collet chuck or clamp with your own hands, you can purchase a jaw chuck to equip your microdrill.

This clamp is an analogue of the jaw chucks used to complete conventional electric drills, and works on a similar principle.

When the movable holder on the body of such a device rotates, the cams with which it is equipped move and thereby ensure reliable fixation of the tool.

Miniature jaw chuck ensures rigid fixation of working attachments

A wide variety of inexpensive jaw clamps are available today to equip micro drills.

The vast majority of their models are fixed on the drive motor shaft using a threaded hole on the side of the mounting part, into which a screw is screwed.

Rotation of the cam clamp cage, depending on the specific model, can be done either manually or using a special key, which is necessarily included in the factory kit of this device.

Purchasing a jaw chuck is a good opportunity for little money to equip your power tool with a universal clamping device that is easy to use and provides reliable fixation of working attachments.

The main thing you should pay attention to when choosing is the material from which the main working elements of the clamp are made.

If you choose a chuck whose jaws are made of durable high-carbon steel, it will last much longer and will provide precise fixation of the tool being used.

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Device manufacturing algorithm

The collection takes place in 3 stages. Let's take a closer look at each of them.

Making a mini cartridge

If your drill is spinning in the wrong direction, swap the wire contacts.

Attachments for a homemade mini drill

can be purchased at any hardware store. Before purchasing, make sure they match the diameter of the collet.

Preparing the body

As a housing for the future device, you can use either an antiperspirant container or a regular hollow tube of a suitable size. hollow tube as the body

.
it is necessary to cut off the bottom and insert a rubber or other plug in its place. If you are making a device from an antiperspirant body
. a hole must be drilled in the cover for the drill to exit.

Connecting the elements

One of the main disadvantages of assembling a drill with your own hands from a motor is the lower power compared to a standard device and the low strength of the drill.

If your work requires a cutter, you can easily make one yourself from an old lighter.

To do this, remove the spinning drum from the lighter and place it on a bolt of a suitable size. Secure this with a nut and insert it into the collet hole. The cutter for surface treatment is ready!

If for some reason the cartridge does not fit in size

to the cylindrical shaft of the motor or coil, it is necessary to degrease it well and then attach it to hot glue. This will help to obtain a stable and durable structure.

Such a mini drill with purchased attachments can perform minor repairs on technical equipment, drilling plastic, thin metal, and making crafts.

The problem of consumption or lack of collet cartridges is especially familiar to jewelers. Specialists involved in the manufacture of printed circuit boards also face this problem.

Collet chucks can be created independently from available materials. However, there are some nuances that will be covered in detail in the article below.

It should be noted right away that a hastily made collet will not be dismountable. That is, strictly speaking, removing one drill from it and inserting another will not work. For this reason, the manufacturing method is more suitable for those who need to create a large number of identical holes.

So, to create a homemade collet chuck we will need:

drill;
blank;
steel wire;
soldering flux;
hoop.

Initially, you should wind the steel wire around the blank in the form of a rigid spring (the half rings come as close to each other as possible). Next, the resulting structure must be thoroughly soldered.

Today, anyone can easily purchase a special cam for any type of drill. This can be done both in construction boutiques that offer equipment for sale, and on the Internet (at auctions such as Ebay or Amazon).

The price of such a device does not exceed sixty rubles. Purchasing a cam will forever save you from searching for suitable collets for using various drills.

Of course, it is better to purchase a cam made of high-carbon, durable steel. To tighten it, it is recommended to use a special wrench, which is included in the kit.

How to make a collet with your own hands

Among the advantages of a mini-drill, it is worth noting its compactness and low cost. In order to save money and not doubt the efficiency and reliability of electrical equipment, modern craftsmen have become adept at making power tools at home. With your own hands, today you can assemble a hand-held micro-electric drill, a high-frequency drill and more. How to make rotary instruments and components for them - read below.

A small electric drill is a must-have for anyone who makes electronic crafts or does delicate decorative work. This machine is ideal for performing small work on wood, plastic and metal, and drilling printed circuit boards.

You can assemble a mini-drill at home from a chuck, a jar of soap bubbles, a motor for rotating the chuck, and a battery.

The motor can be taken from a hair dryer or grinder. An electric motor from a VCR or a motor from an old cassette recorder are also suitable for making crafts.

To make an electric mini drill you need:

Connect the cartridge to the motor. This is best done using cold welding. But you need to work quickly and carefully: the weld quickly hardens and becomes as strong as iron. If it fails, it will not be possible to redo the connection.
Place the cartridge in the jar. For better fixation, the cartridge must be treated with hot glue.
Make a hole in the second base for the switch. It’s better if the switch is small and keyboard-based.

To make a drill with your own hands, you should study the theory and watch a training video

The hand micro drill is ready! All that remains is to solder the wires from the motor and power to the switch, observing the polarity.

To power the mini-drill, 9-12v batteries will be enough.

Additionally, you can do reverse on a six-pin switch.

DIY collet chuck

A collet (or clamping) chuck for a mini-drill is an adapter device used to clamp drills, which is attached to the output shaft of the motor.

The mini-chuck allows you to use drills with a diameter of up to 3 mm. The smallest homemade drill can work with drills with a diameter of 0.7 mm.

The quality of the drill’s operation depends on the quality of the chuck and the attachment of the drill to the motor.

Therefore, the choice of clamp should be approached with all responsibility.

And if a high-quality device cannot be found, it can be manufactured quite simply. In this case, you will not need to use a lathe.

To make the clamp you only need an M8 screw and a closed M8 nut.

Making a collet clamp for a mini drill:

We drill a hole with a diameter of 2 mm in the screw head;
We take a hacksaw and apply two axial cuts to the screw body;
In the closed nut, drill a hole with a diameter of 2 mm exactly in the middle;
Using a larger drill, expand the hole in the closed nut to 3.5 mm;
We make a cone out of the nut by connecting it to a regular drill and grinding it using sandpaper.

The collet is ready! Now you can insert a drill of a suitable size into the bolt and screw on the nut.

To make using the drill convenient, you can make a collet for each micro-drill.

A special drill stand will also help you do quality work.

Do-it-yourself drill for small jobs

The drill has long ceased to be an exclusively professional dental instrument.

Today, a drill with a flexible shaft is actively used to perform small decorative work, grinding, polishing, and cutting various products.

You can make a rotary drill with your own hands, similar to a mini-drill.

At the same time, it should be taken into account that for high-quality work of the homemade product you will need a fairly powerful motor.

So, an 18V motor from a screwdriver is perfect for powering drills.

The easiest way would be to make an engraver from an old blender.

To make a drill you will need:

Disconnect the top part of the blender from the working part;
Using a utility knife, remove the rubber cover on the button and use a screwdriver to unscrew the bolts located under it;
Using a screwdriver, from the side of the power cable, pry up the top cover of the case and carefully remove it;
Remove the circuit connected to the power cable from the blender body;
Remove the plastic part located above the rotator from the housing;
Remove the plastic tip from the electric motor shaft;
Measure the diameter of the shaft with a caliper (if you don’t have one, a ruler will also work for this purpose);
Clean the electric motor housing from oil and degrease its surface using an alcohol wipe;
Place a collet chuck of the appropriate size onto the shaft;
Replace the power button with a push mechanism that controls both turning the device on and off;
Assemble the blender.

Parts for making a drill can be found at a flea market

The hand drill is ready! Such a tool will be powered via a power cable with a plug. You can power the tool with batteries, but then the batteries will have to be changed or charged from time to time.

Do-it-yourself flexible shaft for a drill

If you need to transfer the rotation of the motor of an engraver, drill or bur to an attachment, then you will need a flexible shaft. This device consists of a wire enclosed in flexible armor, twisted in several layers, and

can significantly expand the functionality of a rotary instrument. You can assemble the flexible shaft yourself.

For this you will need:

Brass tube;
Two M4 threaded bushings;
Electrode shaft (diameter 5 mm) with M5 thread;
Adapter from internal thread M5 and external thread M8 to 0.75;
Mini quick-release chuck;
Clamp made from an M12 bolt drilled along the axis;
Protection for connection.

Assembling the flexible shaft. To do this, insert an electrode shaft into the brass tube and put M4 bushings on both sides of the tube.

On one side of the tube we screw an adapter onto the sleeve, and onto it a mini-cartridge. On the back side of the tube we place a clamp, with which we connect the shaft from the electrode to the flexible one.

For convenience, you can sand down the heads of the screws on the clamp. We put a special brass protection on the clamp and secure it with fasteners. We isolate the connection.

The flexible shaft is ready! For convenience, a clamp with a plastic handle can be placed on the cartridge side.

How to make a dynamo from an old printer motor

A dynamo is a device that converts mechanical energy into electrical energy.

The operation of the dynamo is based on the principle of electromagnetic induction.

That is, an electric current arises in a closed circuit of a device when the flux of the magnetic induction vector penetrating the circuit changes over time.

In other words, a dynamo is the simplest direct current generator.

In everyday life, a dynamo can be used to charge audio and video equipment, a smartphone and other low-power gadgets (for example, fitness bracelets, tablets, a toy robot, etc.). In addition, the device is perfect for powering bicycle headlights, LED strips, hand-held flashlights and other devices powered by single-phase networks.

Collet clamps, their types, application features, tips for making a collet with your own hands

A collet chuck is a type of chuck widely used in lathes. it is a self-clamping type of such fixtures since it does not require any additional parts. This is a simple and reliable device that is perfect for turning. What are the features of a collet clamp and how to choose it correctly will be discussed in the article.

Depending on the work to be done and the purpose of the machines, all clamping products can be classified into the following types:

Lever;
Collet;
Drilling, also known as quick-clamping;
Wedge and hydraulic chucks;
Three- and four-cam;
Thermal cartridges and membrane.

Self-clamping drill chucks are used on universal or special lathes. Their use allows the clamping force to be transferred with less torque compared to drill chucks.

Self-production

For working on wood, metal and plastics and for making a variety of printed circuit boards, a small drill is best. It should be equipped with a ready-made mini-clamp-type mount.

But if you don’t have one at hand, you can easily make it yourself. Here you will need a soldering iron, millimeter-thick steel wire and solder.

Next, the manufacturing process proceeds according to the following scheme:

We roll the wire into a spiral. Its diameter must be equal to the diameter of the electric motor shaft and the drill with which it will be necessary to work;
Solder the spiral. High quality is ensured by soldering flux or similar options;
Then we put the spiral on the shaft - and the mini-chuck for our drill is completely ready.

Homemade collet chucks are perfect if there are no ready-made clamps for drills and if you have the appropriate skills to make such mechanisms yourself. They will also become indispensable in the household, when work with specific parts is required, and ready-made clamps may not be suitable for any specifications.

The collet is an important element in lathes of various modifications. With its help, you can carry out work on processing and milling metal and plastic parts. In addition, you can easily make it yourself using available materials.

The variety of such mechanisms available today allows you to select the optimal clamp model for your personal needs.

It is also very important to take into account the method of attaching it to the spindle and the dimensions of the flange, since without them it will be impossible to select a collet

Have fun working with different types of clamps!

Do-it-yourself collet chuck: components and manufacturing procedure

Homemade collet chuck turned on a lathe

Drill made from a toothbrush

The same collet chuck is put on the shaft, and batteries are installed instead of batteries. Or you can adapt a suitable mains power supply.