2M112 tabletop drilling machine

Tabletop drilling machine ⭐⭐⭐ 2m112 is a household-grade vertical drilling equipment that has been produced since the 80s of the last century, has undergone several modernizations and is still in demand when performing a wide range of work on metal, wood and plastic processing. These machines are produced in the Russian Vyatka, are functional, versatile, simple and easy to use and are capable of ensuring drilling accuracy in accordance with GOST 8-82. The 2M112 machine from JSC Gigant is high-quality equipment at an affordable price. We offer our clients only reliable, time-tested solutions and take an individual approach to each request.

What is a tabletop drilling machine 2m112

Drilling machines 2M112 are household-grade machines with an electric drive, designed to perform a wide range of vertical drilling operations:

drilling and reaming round holes in workpieces and parts;
drilling of cylindrical holes (countersinking and reaming);
cutting internal threads in parts.

The equipment is universal and can drill holes in parts and workpieces made of steel, iron, cast iron, non-ferrous metal alloys, durable plastic and any type of wood.

The machine is designed for use in small metalworking and woodworking enterprises, repair shops, vocational schools and home workshops. The price for the tabletop drilling machine 2M112 is favorable. The equipment has excellent performance characteristics.

Are you here

The desktop vertical drilling machine model 2M112 is designed for drilling blind and through holes with a diameter of no more than 12 mm and cutting threads up to M12 in small parts made of various materials (cast iron, steel, non-ferrous metals).

Design of a tabletop drilling machine 2M112

Drilling machine structure:

Colon;
Spindle clamping device;
Electric drive of the machine;
Spindle raising and lowering mechanism;
Bracket;
Plate;
Protective cover;
Spindle;
V-belt tension mechanism.

Controls of tabletop drilling machine 2M112

Spindle manual feed handle S;
V-belt tension handle;
Handle for fixing the spindle along the machine column;
Handle for axial movement of the spindle along the column;
Electric motor control buttons;
Handle for fixing the under-engine plate.

Spindle of tabletop drilling machine model 2M112

The majority of the spindle is made up of a cast iron body. It houses the spindle assembly, the belt tensioning mechanism and the local lighting of the machine. An electric motor is mounted at the rear of the machine spindle.

In Fig. Figure 3 shows a spindle assembly, which consists of a spindle 1, which is located in a sleeve 4 on radial ball bearings 3 and 6. The spindle rotates from a sleeve 8 and a pulley 9 through a spline connection. The spindle is fed manually, using a steering wheel, which consists of a gear shaft 5 and a sleeve with a rack 4. The cartridge is removed from the spindle cone using a nut 2.

Setting up, setting up a tabletop drilling machine 2M112

You can use a stop to drill blind holes to a certain depth.

In Fig. The spindle movement scale is shown. By turning the steering wheel, bring the drill to the surface of the workpiece and drill to the depth of the conical sharpening of the drill.

Then release the lock 4 and turn the nut 5 to place the indicator 2 in the “0” position. Turn nut 5, set the required drilling depth and tighten lock 4.

Adjusting the tension of drive belts

During operation, the belts weaken and the torque on the spindle decreases, so the belts should be tensioned. This is done as follows: you need to lift the protective casing covering the belt drive, release the sub-motor plate using handle 6 (Fig. 2), turn button 2 to tighten the belt and again fix the board with handle 6.

Device

One of the important advantages of the drilling machine is its simple and reliable design. It has gone through several modernizations, but has retained a number of important components.

The modern machine ⭐⭐⭐ 2M112 is a massive steel column with a work table at the bottom and a horizontal bracket at the top. A vertically moving spindle head is mounted on the bracket at the front, and a drive motor is installed at the rear.

The power unit shaft is connected to the spindle module by a drive belt (V-belt drive), and the entire drive is protected by a cast metal casing. The motor shaft is equipped with a pulley with five stages of belt installation (splines), which allows you to adjust the spindle rotation speed when working with parts made of different materials.

The spindle head is a tool movable head with a rotating spindle (quill). It is equipped with mechanisms for fixing on the bracket and moving along the bracket (back and forth), as well as mechanisms for spindle feed (up and down) and tension of the drive belt (adjusts the distance between the transmitting and receiving pulleys), which are controlled using handles.

To adjust the position of the work table, which is a massive thrust plate made of tool steel with T-shaped slots, a mechanism with a handle is also used. To precisely control the movement of the spindle head and the drilling depth, a clamp with a flat measuring notch is installed on the tool head.

The spindle is mounted in a special sleeve with two ball bearings, and its clamping device (Morse taper) is adjusted by a rotating head with a lock, which makes it possible to quickly install and change drills of different sizes to drill holes of the required depth and diameter.

To illuminate the working area of the machine, an electric lamp is attached to the body. The electric drive is started by the start button, which is located on the body of the machine column.

In addition, when working with the machine, you can use additional equipment: a support stand (for face machining of parts with a diameter of up to 120 mm), a cross table for ultra-precise drilling, a replaceable turret, a vice for securely fastening parts on the work table and a cooling unit for long-term drilling superhard materials.

Design features

The 2m112 unit was produced by the Kirov Selmash plant. We can safely consider the GS2112 drilling machine instead of 2m112, 2n112 or 2a112. This is due to the fact that the GS2112 desktop drilling machine is a full-fledged analogue of the model we are considering. There are also no fundamental differences in design.

The vertical drilling unit has the following design features:

An important element of the structure is the supporting base. It plays the role of a desktop;
The electric motor, spindle, spindle head, and speed switching device are located in a separate section. It is connected to the base through a column;
There is a thread on the surface of the column, with the help of which the spindle can change the height of its location relative to the workpiece;
The handle on 2n112 is responsible for changing the position of the upper block. Additionally, the handle controls the spindle, or rather the extension of the head;
To regulate the reach of the spindle, a graduated scale is provided at the end of the equipment. This way the operator can visually monitor what characteristics the equipment currently has;
Taking into account the technical characteristics and design, the machines are capable of performing a standard set of functions - countersinking, reaming, drilling and reaming. Moreover, the devices are designed for processing small-sized workpieces;
Also 2n112 with its brothers form a thread. To do this, the machine is additionally equipped with a tap;
In order for the vertical drilling machine to work efficiently and conveniently for the operator, it is additionally recommended to equip it with a work table that can be adjusted in height. This is due to the small size of the machines;
As the passport and technical specifications indicate, the machine is characterized by a simplified scheme for changing the rotation speed. This circuit consists of pulleys installed in two rows. They are located on the electric motor and spindle drive.

Diagram of the drilling machine

Models GS2112, 2n112 and 2m112 allow for repairs and small-scale production of various products.

When purchasing a drilling machine, you may also need a milling unit. A milling machine provides metal processing and allows you to perform a number of operations. Practice shows that a drilling and milling machine are two closely related devices.

Which milling unit to choose in pair with the 2m112 drilling machine depends entirely on your needs and financial capabilities. Not every milling machine will meet the strict requirements of the master, so the choice should be approached responsibly.

Description of work

The control process for the 2M112 drilling machine is simple, and has remained virtually unchanged over the past 40 years:

The part or workpiece must be secured in clamps (mounted on T-slots) on a coordinate work table or in a vice.
A drill of the required size is inserted into the spindle, clamped and fixed.
On the measuring flat scale of the tool head, a fixed height of the spindle (tool head overhang) is set using a clamp.
Rotary handles are used to set the position of the spindle head above the work table and the required speed of rotation of the drill (the harder the part, the higher the speed should be).
The button starts the engine.
Using the spindle head feed adjustment handle, the drill is lowered towards the part and drilling is performed.

After completing the operation, the spindle head is raised up with the same adjustment handle, then the machine engine is turned off.

About the advantages and disadvantages

For high protection against various damages and breakdowns, the manufacturer has assembled all the important components and mechanisms into a solid cast-iron body. For additional convenience, the unit has a built-in lighting function for the work table and processing area.

The production of the product began in the early eighties. Although more than a decade has passed since then, the popularity of the unit has not diminished . To this day it is in great demand at large enterprises and small private workshops. The 2m112 model is highly valued by specialists of this profile for its reliability, ease of operation and good characteristics.

Even if the 2m112 machine has completely malfunctioned and cannot be restored (which in itself is an extremely rare occurrence), users are looking for a device of the same model. Although Chinese analogues are cheaper, their quality often suffers greatly, and European equipment is an order of magnitude more expensive.

Thanks to its high reliability and good service life, the 2m112 drilling machine is able to perfectly cope with difficult operating conditions of uninterrupted operation.

Read also: Field welding designation on the drawings

The simplicity of the design makes it possible to repair it yourself and will not cause any particular difficulties. Nowadays, you can easily find the necessary spare parts and components. So there will be no problems with repairs.

The engine power is quite enough for both industrial organizations and small private enterprises. Considering the relatively affordable price and extremely high reliability due to the long service life, it becomes clear why the machine, developed back in the last century, is so popular.

The 2m112 drilling machine, despite its rather long history of existence, is still in great demand in workshops, vocational schools, and various industries. You might have come across the 2m112 model, as well as its analogues in the form of gs2112, 2n112 and 2a112, in labor lessons at your school. Therefore, let’s look at the 2m112 model in more detail, look at its passport and study the technical characteristics.

Technical characteristics of the drilling machine 2m112

Parameter	Meaning
Drilling diameter in steel 45 GOST 1050-88, mm	12
Spindle overhang (distance from the spindle axis to the generatrix of the column), mm	190
Outer spindle cone size according to GOST 9953-82	B18
Maximum spindle movement, mm	100
Dial division price, mm	1
Distance from the end of the spindle to the working surface of the table, mm	50…400
Dimensions of the working surface of the table, mm	200 x 250
Number of T-slots	3
Distance between grooves, mm	50
Groove width, mm	14
Number of spindle speeds	5
Speed, rpm	450…4500
Drilling feed	manual
Electric motor power, kW	0,55
Rotation speed, rpm.	1500
Supply voltage, V	380
Overall dimensions, mm	770x370x950
Machine weight, kg no more	120

The technical characteristics of the machine make it possible to process workpieces with a wide range of characteristics - dimensions 250 x 250 mm (worktable size) and height up to 400 mm (height from the spindle to the working surface). When using a special cabinet for installing large parts, the machine can drill end holes in parts up to 100 cm in length.

In addition, the following should be taken into account:

machine motor power – 550 W (from three-phase 380 V);
spindle reach – 19 cm;
vertical movement of the spindle with drill – 10 cm;
the three-jaw spindle chuck B-18 rotates in the speed range - 450-4500 rpm (5 speed modes);
the maximum diameter of a drill that can be fixed in a shortened Morse clamping cone KM-2 is 2-12 mm (for steel workpieces) and 16 mm (for other materials);
The maximum depth of drilled holes is 10 cm.

All modules and structural elements comply with GOST, the spindle transmission in all planes is manual. The weight of the machine is 120 kg with dimensions 77 x 37 x 95 cm. The measuring flat scale has a division value of 1 mm.

2 Tabletop drilling machine. Purpose and scope

The machine is designed for drilling holes and cutting threads in small parts made of cast iron, steel, non-ferrous alloys and non-metallic materials in industrial enterprises, repair shops and household workshops.

Main technical characteristics of the tabletop drilling machine 2m112

Manufacturer: Kirov Machine Tool Plant.

Maximum drilling diameter: Ø 12 mm
Maximum drilling depth: 100 mm
Maximum height of the workpiece installed on the work table: 400 mm
Spindle speed limits per minute - (5 steps) 450, 800, 1400, 2500, 4500 rpm
Spindle end - B18 external shortened Morse taper 2 according to GOST 9953
Standard drill chuck - Chuck 16-B18 GOST 8522-79, clamping range 3..16 mm
Electric motor power: 0.55 kW
Machine weight: 120 kg

The spindle of the 2m112 machine receives five rotation speeds from five-stage drive pulleys, which provides free choice of cutting speeds in the range from 450 to 4500 rpm.

The end of the spindle is an external shortened Morse taper KM2, designation B18 according to GOST 9953 (Shortened tool tapers) - shortened cone: D = 17.780 mm, cone length 37.0 mm.

The shortened cone B18 corresponds to a three-jaw drill chuck of the 16th standard size in accordance with GOST 8522 (Three-jaw drill chucks) with a clamping range from 3 to 16 mm.

An example of a symbol for a 3-jaw drill chuck, size 16, with a connecting conical hole B18:

Cartridge 16-B18 GOST 8522-79

Morse cone instrumental shortened

Tool taper - Morse taper is one of the most widely used tool mounts. It was proposed by Stephen A. Morse around 1864.

The Morse taper is divided into eight sizes - from KM0 to KM7 (in English: MT0-MT7, in German: MK0-MK7).

Morse taper standards: GOST 25557 (Tool cones. Main dimensions), ISO 296, DIN 228. Cones made according to inch and metric standards are interchangeable in everything except the shank thread.

For many applications, the length of the Morse cone turned out to be excessive. Therefore, a standard was introduced for nine standard sizes of shortened Morse cones (B7, B10, B12, B16, B18, B22, B24, B32, B45), these dimensions were obtained by removing the thicker part of the cone. The number in the designation of a short cone is the diameter of the thick part of the cone in mm.

B7 - Morse cone KM0 , D = 7.067 mm;
B10 - Morse cone KM1 , D = 10.094 mm. Cartridge 4-B10 (0.5÷4 mm);
B12 - Morse cone KM1 , D = 12.065 mm. Cartridge 6-B12 (0.5÷6 mm), Cartridge 8-B12 (1÷8 mm);
B16 - Morse cone KM2 , D = 15.733 mm. Cartridge 10-B16 (1÷10 mm), Cartridge 13-B16 (1÷13 mm);
B18 - Morse cone KM2 , D = 17.780 mm. Cartridge 16-B18 (3÷16 mm);
B22 - Morse cone KM3 , D = 21.793 mm. Cartridge 20-B22 (5÷20 mm);
B24 - Morse cone KM3 , D = 23.825 mm;
B32 - Morse cone KM4 , D = 31.267 mm;
B45 - Morse cone KM5 , D = 44.399 mm.

Where D is the diameter of the cone in the main plane.

The drilling depth is measured using a flat scale or stop.

The original design of the belt drive tension allows you to quickly change the position of the belt on the pulleys to obtain the desired cutting speed.

Using a stand to install the machine makes it possible to drill the ends of long parts, such as shafts. The shaft diameter is up to one hundred and twenty millimeters, the length is up to a thousand millimeters.

The 2M112 drilling machine allows you to perform the following operations:

drilling
countersinking
deployment
reaming
thread cutting

The 2M112 drilling machine can be equipped with additional accessories to expand its capabilities:

Vise - indispensable for complex types of processing, for example, small parts or drilling at an angle
Cross table - indispensable for precise coordinate drilling or light milling
Turret
Cooling unit - indispensable for long-term drilling

Analogues of the desktop drilling machine 2M112

ENS12 - Ø12 - Yeysk machine tool plant ESZ, Yeysk

OD71 - Ø12 - Orenburg Machine Tool Plant, Orenburg

NS-12A - Ø12 - Vilnius Machine Tool Plant

NS-12B, NS-12-M - Ø12 - Barnaul Machine Tool Plant

SHUNSS-12 - Ø12 - Mukachevo Machine Tool Plant, village. Kolchino

GS2112 – Ø12 – Gomel Machine Unit Plant

ZIM1330.00.00.001 - Ø12 - Maslennikov Plant, ZIM-Machine Tool Builder, Samara

MP8-1655 - Ø12 - Machine Tool Plant named after. Kirov, Minsk

BS-01 - Ø12 - Bevers, Berdichev

VS3-5016 - Ø12 - Voronezh Machine Tool Plant

R175M - Ø12 - Chistopol AutoSpetsEquipment plant, Chistopol

Р175, Р175М – Ø13 – AutoSpetsEquipment

VI 2-7 - Ø14 - Volgograd Tool Plant

MD-23 – Ø14 – Kaunas Machine Tool Plant

Main advantages

The long-term popularity and widespread use in everyday life and industrial production of the 2M112 machine is associated with its simple and reliable design and universal technical characteristics. This equipment is different:

high mechanical strength, wear resistance and long service life;
long periods of maintenance-free operation and high maintainability (modules can simply be replaced as they wear out);
high quality and wear resistance of structural elements (mainly steel parts);
ability to withstand severe temperature changes and air pollution;
endurance and long continuous working cycle;
the ability to process products and parts from different materials;
ease of management and configuration;
unpretentiousness in care and maintenance;
“vertical” design, light weight and compact dimensions (can be installed in small spaces and easily moved from place to place).

It should also be noted that there is an optimal combination of quality, performance and cost, which is important when choosing a drilling machine. European equipment of the same class is usually more expensive, while Chinese equipment is inferior in quality, reliability and performance.

Equipment safety and maintenance

When operating the 2M112 drilling machine, a number of mandatory safety requirements must be observed:

All moving units and adjustable modules have rigid clamps that prevent arbitrary displacement of the adjusted positions of the spindle head. However, before starting work, they should be checked for serviceability and reliability.
The machine engine should be started after the drill is securely secured in the spindle sleeve, and the workpiece is securely secured in the grooves of the work table or vice. The tool head must be secured in the upper position.
The machine must be grounded before operation (for recommendations on grounding, see the product data sheet and the manufacturer’s instructions).
Do not use drills that do not comply with the parameters specified in the manufacturer's recommendations.
The machine operator must wear protective clothing and safety glasses to avoid burns and damage to the skin and eyes from metal shavings.

Maintenance work must be carried out by both the drilling machine operators themselves and the master technologists in accordance with the maintenance card.

Maintenance is a simple set of works, since the design of the 2M112 machine is simple and reliable, containing a small number of moving parts (minimal lubrication is required). However, it should be remembered that:

The work area must be cleared of chips and dust before drilling and upon completion of work operations.
All working units and latches of control mechanisms must be checked before starting work (belt drives, bearings, couplings, rotary mechanisms). If necessary, the units should be adjusted immediately.
Before each work cycle, mandatory attention should be paid to the tension level of the motor pulley belt and the strength of the Morse cone clamps in order to prevent rotation failure, motor burnout and accidental flying of the drill from the clamp.

The machine components should be lubricated regularly and only with high-quality lubricants (machine oil and grease, lithol for bearings). It is important not to forget to change the grease of the bearings in the spindle chuck at least once every six months. If engine speed modes are frequently changed, the belt tension regulator and spindle clamps should be regularly lubricated, and the spindle itself, with a constant workload, requires cleaning and lubrication at least once every two days.

Transportation.

To transport the unpacked machine, a steel rod Ø 6-17 mm is used, which is passed through the hole provided in the body.

When gripping the machine with ropes by the rod, care must be taken not to damage the lining of the machine. In this case, the spindle head of the machine must be moved to its lowest position and securely fastened.

When transporting to the installation site and when lowering onto the foundation, the machine should not be subjected to strong shocks.

Before installation, the machine must be thoroughly cleaned of the anti-corrosion coatings applied to the machine’s open and covered surfaces with casings and shields, and to avoid corrosion, coated with a thin layer of I-ZOA oil GOST 20799-88.

Installation diagram of the 2M112 machine

Cleaning is first done with a wooden spatula, and the remaining lubricant from the outer surfaces is removed with clean napkins moistened with gasoline B-70 GOST 511-82. When re-opening the machine, comply with the safety requirements in accordance with GOST 9.014-78.

How to buy a 2M112 drilling machine in Moscow with delivery?

You can buy a tabletop drilling machine 2M112 in Moscow at an affordable price. JSC Gigant guarantees the shortest possible delivery times.

If you want to leave an order, please contact the managers of our company in the following ways:

telephone; +7;
address: Moscow, 1st Institutskiy proezd, 5, building 1 (metro station “Ryazansky Prospekt”);
Fax ;
Email

Our equipment is reliable, practical, but its main advantage is, undoubtedly, its reasonable cost.

Recommendations for use

The electrical power of the motor used, the layout of the unit and its technical parameters make it possible to carry out repairs and produce various spare parts using these machines.

Although not modern, the 2m112 desktop drilling machine, which is still relevant, offered a passport in the kit. This passport allowed the machine operator to obtain all the necessary information regarding the equipment. So the operator could select spare parts with his own hands, perform repairs, and manufacture various parts using the machine.

Therefore, finding this passport is strongly recommended for anyone who plans to equip their own workshop, carry out repairs and produce parts.

At the same time, everyone should know the basics of operating such equipment.

When connecting the machine to the electrical network, be sure to remember to ground it. Otherwise, it may result in equipment failure and personal injury.
During the first launch, be sure to complete all preparatory activities. The machine passport clearly describes them, so rely only on factory recommendations.
Check the serviceability of all components, make sure they are working before you start drilling spare parts or repairing elements.
During operation, periodically inspect the condition of the machine components. Make sure that all spare parts are in good condition and there are no defects anywhere.
All moving elements, according to data from the passport, should be lubricated with special compounds.
Never operate the machine with the top cover removed.

The design of the unit is quite simple, which is why the 2n112, like its analogues, is still in impressive demand on the market. The current price of the machine is on average 50-70 thousand rubles.

By purchasing drilling and milling machines, you can turn a small workshop into a full-fledged production. What exactly you will produce using drilling and milling units is entirely up to you.

The 2M112 machine is a model of vertical drilling equipment widespread during Soviet times, produced by the Kirov Machine Tool Plant in the period 1980-1995. This unit is characterized by productivity, increased reliability and drilling accuracy.

The article will discuss the purpose, functionality, design features and technical characteristics of the 2M112 machine.