Information about the manufacturer of the tabletop drilling machine SNVSH
Tabletop drilling machine SNVSH-1, SNVSH-2 is produced by the company Rostov plant of small-sized machine tools MAGSO, founded in 1956.
Other manufacturers of the SNVSH-1 machine: Novocherkassk Electromechanical Plant NEMZ, Kasimovsky Mechanical Plant No. 8, By Set Leningrad.
SNVSH tabletop drilling machine. Purpose and scope
In 1985, the SNVSh-1 machine replaced in production the NS-Sh model table-top drilling machine, which had been produced since 1978.
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.
The simplicity of the design ensures ease of control, reliability and durability of the machines.
Main parameters of the SNVSh drilling machine:
- Maximum drilling diameter: Ø12 mm
- Maximum drilling depth: 100 mm
- Distance of spindle axis to column (overhang): 160 mm
- Electric motor power: 0.6 kW
- Machine weight: 85 kg
Spindle The VSN machine receives 3 rotation speeds from three-stage drive pulleys, which provides a choice of cutting speeds - 450, 1200, 1800 rpm.
Spindle end- external Morse cone KM2, designation B18 according to GOST 9953 (Shortened tool cones) - 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.
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.
Russian standard for shortened cones GOST 9953 Tool cones are shortened.
Russian standard for drill chucks GOST 8522 Three-jaw drill chucks.
- 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), Chuck 8-B12(1÷8 mm);
- B16- Morse cone KM2, D = 15.733 mm. Cartridge 10-B16(1÷10 mm), Chuck 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- 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 diameter of the shaft is up to one hundred and twenty millimeters, the length is up to a thousand millimeters.
The SNVSh drilling machine allows you to perform the following operations:
- drilling
- countersinking
- deployment
- reaming
- thread cutting
The SNVSh 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
General view of the SNVSh tabletop drilling machine
Photo of the SNVSh drilling machine Kasimovsky Mechanical Plant No. 8
Tabletop drilling machine SNVSh. Video.
Technical characteristics of the SNVSh machine
| Parameter name | 2m112 | SNVSH |
|---|---|---|
| Basic machine parameters | ||
| Largest drilling diameter, mm | 12 | 12 |
| The smallest and largest distance from the end of the spindle to the table | 0...400 | 20..420 |
| Distance from the axis of the vertical spindle to the rack guides (overhang), mm | 190 | 160 |
| Desktop | ||
| Width of the working surface of the table, mm | 250 | 250 x 250 |
| Number of T-slots | 3 | 3 |
| Spindle | ||
| Maximum movement of the spindle head, mm | ||
| Spindle sleeve stroke, mm | 100 | 100 |
| Spindle speed, rpm | 450, 800, 1400, 2500, 4500 | 720, 1400, 2000 |
| Number of spindle speeds | 5 | 3 |
| Spindle taper | Morse B18 | Morse B18 |
| Drive unit | ||
| Main motion drive electric motor, kW | 0,55 | 0,6 |
| Dimensions and weight of the machine | ||
| Machine dimensions (length width height), mm | 795 x 370 x 950 | 660 x 360 x 750 |
| Machine weight, kg | 120 | 85 |
This equipment was developed by the Odessa Design Bureau; production was launched at several enterprises of the former USSR in the middle of the last century. Based on the main model, a number of modifications NS-12A, NS-12B, NS-12M were created, with minor differences in characteristics and configuration. The NS-12 drilling machine performs hole drilling and thread processing in parts made of steel, cast iron, non-ferrous metals and alloys, and non-metallic materials. It belongs to the group of tabletop machines.
Description of the unit
It has small dimensions and is installed on a workbench, allowing for the processing of small parts. It is used to equip repair production departments, educational and home workshops.
Despite its small dimensions and low performance, it is lightweight and easy to use. The simplicity of the design makes maintenance and repair accessible.
Design of drilling machine NS-12
The machine is easy to operate, and its simple design increases reliability and durability.
The NS-12 machine has five operating spindle rotation speeds. The rotation speed is changed using a belt drive. The belt is quickly rearranged on multi-stage pulleys from one diameter to another. Thanks to the original design of the tension mechanism, craftsmen can easily obtain the desired cutting speed.
The technical characteristics of the NS-12A drilling machine make it possible to perform the following operations:
- drill and ream holes;
- countersinking and countersinking;
- unfold holes;
- cut the internal thread.
The main cutting movement is the rotation of the tool and the vertical feed of the spindle.
The largest drilling diameter in a steel part, the largest spindle stroke and overhang are the basic parameters of the machine. A description of the equipment is also easy to find on the Internet or from experienced professionals. Any equipment of this type has its own passport, which contains all the technical and specific instructions.
Machine passport
Design of the NS-12A machine
The main design elements of a tabletop drilling machine are:
- base;
- Column;
- trunk with spindle group;
- electric drive;
- controls.
The cast iron base serves as a support base, and inside the massive plate there are electric drive elements, including a switch housing that provides lighting for the work area and a step-down transformer.
A push-button station for turning on the equipment is located on the front panel of the base. At the top of the base there is a work table for installation and securing fixtures and parts.
Along the perimeter contour there is a trench for accumulating coolant used during processing. The gutter has a drain hole closed with a screw plug. In the case of supply from the central line, a nipple with a rubber hose is connected to the hole.
The column is fixed to the base plate with a special shoe and tightened with bolts. When it is necessary to rotate the column around its axis, the bolts are released, the stand together with the upper part is installed in the required position and fixed.
The trunk consists of a cast iron body in which a spindle assembly, a movement mechanism, a belt tensioner and a local lighting lamp are mounted.
An electric motor is suspended from the rear of the body on a sub-motor plate.
It will be able to move longitudinally along the guides. Motor mobility is necessary to reduce the tension of the drive belt when adjusting the spindle speed. When the belt is placed in the pulley groove, the motor returns to its place and the required tension is ensured.
The raising and lowering of the trunk along the column is ensured by a rack and pinion transmission. The transmission rack is firmly fixed to the column, and the drive gear is located in the trunk. Vertical movement is controlled manually through a handle that has a rigid connection with the gear. The second lever is located near the column and fixes the position on the column; this occurs at the required height above the table.
The spindle is installed on the cantilever part of the trunk in the machine quill, movable in the vertical direction.
The movement of the quill, which transmits the feed movement to the spindle, is carried out by a handle located on the side of the trunk. The spindle of the NS-12A drilling machine is placed in supports with precision angular contact bearings; they ensure precision movement and smooth running. The control pulley is made in the form of a five-stage design and is mounted in supports with radial bearings.
You can control the drilling depth of blind holes using a special hard stop and a flat scale on the body.
Machine control principle
Before putting the machine into operation, you need to make sure that grounding is present.
Operating the machine is quite simple:
- to turn it on, you must press the “Start” button on the push-button starter panel;
- switching on is accompanied by the start of the electric motor;
- the machine is ready for work, and to stop work, press the “Stop” button. The power will turn off and the engine will stop. If necessary, local lighting is turned on by turning the toggle switch of the package switch.
Unit control
List of control elements for the NS-12A drilling machine:
- "Start" power button;
- “Stop” shutdown button;
- light switch;
- lever for vertical movement of the trunk along the column;
- tension device clamps;
- quill movement control handle for manual feeding;
- handle for fixing the position of the trunk.
Trunk position fixing handle
Local lighting
The machine is equipped with the necessary equipment for connecting local lighting. The installation location is selected depending on the installation location.
Most often, craftsmen choose a workbench or a monolithic table as a place to install the NS-12A drilling machine. Then the mounting bracket with the local lighting transformer is installed near the machine on the same base. When placing equipment near a wall, it is convenient to place the mount on it.
The presented drilling machine model is considered reliable equipment with a clear control algorithm. The model is highly maintainable and does not require large maintenance costs.
A popular and budget model will be an ideal assistant in the following rooms:
- auto repair shop;
- mini-workshop;
- educational laboratory of the technical school.
Video: Drilling machine NS-12A
The NS-12, whose design was developed by engineers of the Special Design Bureau No. 3 in Odessa, was produced in the 1950s–1970s. several enterprises of the USSR, a number of vocational and technical schools. Along with the NS-12 model, a number of its modified versions were also produced (NS-12A, NS-12B, NS-12M), the design and equipment of which differed slightly from the characteristics of the basic equipment.
Purpose of the machine model NS-12
Model NS-12 belongs to the category of desktop equipment. This suggests that it is suitable for processing small-sized parts. The appropriate dimensions and low productivity of the machine make it possible to use it in repair shops of manufacturing enterprises and small workshops, specialized classes of technical and general educational institutions. You can often find such a device in home workshops.
The long service life, ease of use, maintenance and repair of the NS-12 machine are ensured by the simplicity of its design. When drilling blind holes on such a machine, their depth can be adjusted using a flat scale or a special stop.
The use of a multi-stage belt drive in a drilling machine allows for five different rotation speeds of the spindle assembly. What is important is that the belt can be switched to a pulley of a different diameter simply and quickly thanks to a special belt tensioning mechanism.
The technical capabilities of the drilling machine model NS-12 allow you to perform various types of processing of workpieces made of cast iron, steel, non-ferrous metals and non-metallic materials:
- drilling and reaming holes;
- deployment;
- countersinking;
- internal thread cutting.
Equipment design elements
The design of the NS-12 drilling machine includes the following elements:
- base plate;
- column;
- a trunk on which the spindle group of equipment is mounted;
- electrical equipment.
The column, which is installed on the base plate, is secured to it using a special shoe. Along the perimeter of the base plate there is a special chute for collecting coolant. The liquid drains from the gutter through the lower hole, which is closed with a screw plug. If the coolant is supplied from a centralized network, a nipple is screwed into the drain hole, to which a rubber hose is connected.
The inside of the massive base plate is used to house a step-down transformer and a package switch housing, which is responsible for lighting the processing area. A push-button station is mounted on the front of the plate, with the help of which the main electric motor of the machine is turned on.
The vertical movement of the trunk along the column is carried out due to a rack and pinion transmission, consisting of a rack mounted on the column and a gear mounted in the trunk. This movement is controlled using a handle rigidly connected to the gear. Among the controls of the drilling machine there is another handle, with the help of which the trunk is fixed at the required height.
The spindle assembly is mounted on the trunk; there is also a plate with an electric motor mounted on it and a mechanism for tensioning the drive belts. The spindle itself is installed in the sleeve (quills) of the machine, which can move in the vertical direction.
The movement of the sleeve, which imparts the feed movement to the spindle, is controlled by means of a handle located on the side of the trunk. Smooth and precise rotation of the spindle is ensured by its installation in supports with precision angular contact bearings. The spindle pulley of the drilling machine, which is a five-stage design, is also mounted on two supports with radial bearings.
The machine's electric motor is mounted on a special plate and can move along its guides. This design allows for quick loosening of the drive belt at the moment when it needs to be transferred to another pulley, as well as its rapid tension when it is necessary to begin processing.
How does the kinematic diagram of the machine work?
The electric motor of the drilling machine rotates a five-speed pulley fixed on its shaft, the torque from which is transmitted through a V-belt to the pulley of the spindle assembly. The vertical movement of the sleeve and, accordingly, the spindle assembly is carried out due to the rack and gear fixed on it, which is rigidly connected to the corresponding control handle.
The trunk of the NS-12 drilling machine moves in the vertical direction also due to the rack and pinion transmission, the operation of which was described above. The shoe, mounted on the base plate, has a special clamp, after loosening which you can rotate the column together with the trunk around its axis.
To ensure operator safety, a cast or extended welded casing is mounted on the drill press belt drive.
What does the electrical diagram of the device include?
This characteristic of the machine of this model, such as ease of use and repair, is determined, among other things, by the simplicity of the electrical circuit. The elements of the electrical circuit of the NS-12 drilling machine, which are responsible for controlling the equipment, are the “Start” button, when pressed, the drive motor is started, and the “Stop” button, with which the electric motor is turned off.
The characteristics of the drilling machine include the presence of local lighting, which is turned on when the handle of the corresponding batch switch is turned. The operation of the local lighting system requires the use of a step-down transformer, which is mounted in close proximity to the machine.
