Domestic can rightfully be considered the leading Russian manufacturer of lathes. One of its most successful know-how is the Corvette model range, which is represented by high-quality units designed for processing metal, wood, plastic and other workpieces. In this article we will look at the most popular units among craftsmen. In particular, we will talk about the Corvette 401, Corvette 402 and Corvette 403 lathes.
What do representatives of this line have in common? The units are primarily united by their high reliability and generally recognized performance. Each model is aimed at its target audience. Some of them are compact, others have higher performance. This allows the master to choose a unit that will ideally suit his parameters, without overpaying for unnecessary functions and without saving on performance.
Let's consider each of the above-mentioned units separately.
Description
First of all, it’s worth talking about the Corvette-400 screw-cutting lathe. This device is intended for:
- Cutting and boring parts.
- Boring of workpieces in the shape of a cone and cylinder.
- Drilling works.
- Creating metric threads.
- Working with the ends of parts.
In addition, with certain modifications, the machine can work with parts of large diameter or length. This effect is achieved by installing a movable or static rest and return cams.
Turning operations on this device can be carried out off-center (after installing the faceplate). A relatively large number of additional cutting attachments are installed on the machine, which became possible due to the wide range of rotation speeds.
The design of the machine allows it to perform sharpening work with accuracy class “N”. The device is distinguished by its reliability and long period of effective operation compared to other desktop machines. The most acceptable temperature conditions for working with Corvette-400 mechanisms are positive temperatures (from +1 to +38 C), air humidity no more than 80%.
Corvette 403
The Corvette 403 lathe, like the 402 model, is equipped with an asynchronous 750-watt motor and a silent belt drive. In this case, the stroke of the transverse and rotary calipers is one hundred ten and fifty millimeters, respectively. The pitch of the cut metric thread ranges from 0.5-3 mm.
Just like in the Corvette 402 unit, the Corvette 403 turning unit has a maximum cutter holder size of 13x13 millimeters. Let's denote that model 403 is 250 mm longer. The dimensions of the unit are 1300x560x560 mm, and the weight reaches 120 kg.
conclusions
The manufacturing company, which supplies the market with turning units under the Corvette brand, offers a wide range of equipment. Each presented model has its own characteristics. At the same time, there is no gap between more productive and less productive machines in terms of functionality or price. This means that the master has the opportunity to select exactly the equipment that meets his needs as accurately as possible.
Structural features
The metal lathe from the Encor Corvette-400 company implements a number of design solutions that allow it to perform all basic types of work and increase the reliability of the device:
- Possibility of deep modification of the machine using additional equipment.
- The device is equipped with a commutator type motor.
- Operator safety is ensured thanks to a protective casing with a switch.
- The structural features of the gearbox significantly reduce the noise level when performing work and minimize the chance of engine overload.
- Availability of a container for collecting production waste.
- Automatic switching on of the engine after a temporary stop is impossible due to the presence of a magnetic starter.
- Option to operate the spindle and carriage in reverse mode.
- The possibility of moving the tailstock significantly increases the size of the processed conical parts.
- Possibility of adjusting spindle speed in two ranges.
- The design of the support allows the processing of conical parts of short length.
- Replaceable gears provide adjustment of thread production with the pitch required by the operator.
- The presence of slides that allow you to adjust the smoothness of the caliper.
- An indicator for making threads significantly increases the accuracy of such work, and special dials make it possible to more carefully control the movement of the caliper.
Key technical indicators
The main parameters of the machine can be considered its dimensions and the maximum dimensions of the parts processed on it.
- length – 77 cm;
- height – 33 cm;
- width – 33 cm;
- weight – 37 kg.
The maximum dimensions of parts depend on the place of their processing. At the centers, the machine is capable of working with workpieces up to 30 cm long. The maximum diameter of the workpiece above the bed is 18 cm, and the diameter of the through hole in the spindle is 2 cm. When turning, the maximum depth that the device produces in one pass is 0.2 millimeters. Spindle rotation speed – up to 2500 rpm.
Detailed technical characteristics of the caliper can be found in the table:
Corvette 402
The lathe is in many ways similar to its “little brother”. Its peculiarity is that it has an asynchronous power unit. The design still provides for a low-noise belt drive and the presence of the aforementioned starter. The unit is designed in the same way as the 401 machine. Let's look at what distinguishes them.
The machine is equipped with a 750-watt electric motor, which provides a spindle speed of 1800 rpm. The distance between centers is five hundred millimeters with a hole diameter of 20 mm. In this case, the maximum processing diameter on the bed is 220 mm.
Unlike the Corvette 401 model, which has a maximum cutter holder size of 10x10 mm, the Corvette 402 lathe boasts this indicator at 13x13 mm. Of course, a more productive machine should be larger and weigh more. The weight of the Corvette 402 machine is 105 kg, and the dimensions of the assembled and packaged unit are 1050x560x570 mm.
Description of electrical equipment
The machine operates from a network with a voltage of 220 V, and can be grounded using a special plug. Operating frequency – 50 Hz. To turn on the device, you need to perform a number of simple functions:
- Move the rotation speed regulator to the initial position by turning it counterclockwise.
- Release the emergency shutdown button (move the cover to the side).
- Specify the direction for rotating the chuck.
- Activate rotation by smoothly turning the speed control to the desired speed clockwise.
Remember that the rotation speed depends on the voltage transmitted from the converter! To deactivate the device, turn the speed control counterclockwise all the way or through the emergency shutdown button. You can simply unplug the plug from the socket, but it is safest to use the first option.
Emergency shutdown of the machine should only be used in special situations. The electrical equipment of the device is protected from various power problems using a special fuse, the performance of which must be constantly monitored and changed in time.
Other models of the Corvette machine
Corvette-401
This model differs from the previous one by an electric motor with increased power (500W). All working components of the Corvette 401 are made of high-quality steel. At the same time, this device costs an order of magnitude higher than the previous one - 55-60 thousand rubles. It is 5 cm longer than the Corvette 400, but 2 cm narrower and 1 cm lower. The device operates even quieter than the 400th model and creates minimal vibrations.
As with the previous machine, the design of the Corvette 401 model provides for the creation of metric threads using a wide variety of pitches. This result was achieved through the use of replaceable gears. Like the Corvette-400, this device is reliable, compact and easy to use.
Corvette-402
The scope of application of this model is the same as that of its counterparts. It does an excellent job of facing, turning, milling, and creating threads. Drilling and chamfering work is performed on it.
It differs from previous versions with an even more powerful motor (750 W). In addition, this model has an asynchronous electric motor, which significantly increases its operating time and makes it less susceptible to overheating. In addition, the device is safer for the worker, since its design provides for a protective screen.
Despite the more powerful engine, the Corvette 402's rpm is lower than its siblings (1800 rpm). On the other hand, the machine is capable of processing workpieces with slightly larger dimensions. For example, the maximum diameter of the part above the bed is 22 centimeters, and the maximum length of the workpiece in the centers is 50 cm. At the same time, this machine is noticeably larger than previous models in size, although it can hardly be called large.
Video: Corvette 402 lathe.
Corvette-403
This model is most similar to the Corvette 402, but differs from it in the advanced adjustment of the caliper feed (thanks to the electronic system). The technical indicators and capabilities of the machine actually duplicate the previous model. Modernization of control makes it possible to set the direction and intensity of movement of the caliper.
As in the previous model, the Corvette-403 has 6 stages of forward and reverse spindle rotation, and its maximum speed is 1800 rpm.
Corvette-407
This machine is fundamentally different from previous models not only in price (about 170 thousand rubles), but also in its focus on use in large workshops with significant production turnover. This model copes well with milling and turning work, and can grind workpieces no worse than profile machines. Increased functionality affected the dimensions of the device:
- length – 130 cm;
- width – 66 cm;
- height – 72 cm;
- weight – 150 kg.
The Corvette-407 differs from previous models in its thread depth (0.3 mm) and the ability to create not only metric but also inch threads. In this case, the maximum drilling diameter is 1.3 cm. The design of the device provides for the presence of two electric motors - for turning and milling.
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Corvette 401
The Corvette 401 lathe is an ideal engineering solution focused on working with metal, wood and other materials by turning. The machine can be used to turn workpieces using a variety of methods. It can be used to trim, cut threads, drill and bore workpieces. Using the Corvette 401 machine, you can also select fillets and chamfer.
If the master is faced with the task of processing parts of significant diameter, it is possible to mount the jaws in a specially designed chuck. If you plan to work with workpieces of non-standard length, the Corvette 401 series can be equipped with a steady rest. During the installation of the faceplate, it is possible to carry out the operation with some displacement relative to the axis of rotation. The fact that a considerable range of rotation speeds and feed rates is available in the Corvette 401 suggests that the list of metal-cutting tools that can be equipped with this machine is quite wide.
Let us note the key functional and technological features of the Corvette 401 lathe, presenting them in the form of a list:
- Availability of a reliable 500-watt brushed motor.
- Low noise level ensured by a special belt drive. The same design feature prevents excessive load on the power unit.
- Built-in magnetic starter, which eliminates the involuntary start of the unit after an unexpected power outage.
- Gradual spindle adjustment system.
- Easy-to-change gears allow you to create threads of the desired format without wasting unnecessary time.
- The presence of a table that allows you to manually configure the machine to create threads of a certain format.
- Built-in indicator that ensures extreme accuracy of workpiece processing during thread cutting.
- The presence of limbs (division is 25 microns).
- The ability to move the calipers along the slides provided by the design along the abscissa and ordinate axis. In this case, the master can adjust the smoothness of the ride and eliminate such a phenomenon as backlash.
- Built-in rotary type caliper.
- Tailstock allowing for conical turning.
- The presence of a tray and casing that protect the unit from external influences and make its operation extremely safe.
The Corvette 401 machine operates in 220V power supply mode. The 500-watt electric motor accelerates the spindle to 1100 rpm. The gap between centers is three hundred millimeters, and the hole diameter is 20 mm. In this case, the maximum processing diameter above the bed reaches 180 mm.
The machine of this model boasts modest dimensions of 750x330x310 mm. and a moderate weight of 36 kg. This makes it incredibly mobile. Its small size allows us to talk about its ergonomics and ease of use in a small workshop or even an ordinary garage.
