Developer of desktop drilling machine model NS-12 - Special design bureau for special machine tools SKB-3, Odessa. SKB-3 was created in 1947 and existed until the mid-90s.

The machine tool was produced by machine tool factories and several trade and technical schools of the Soviet Union in the 50-70s of the last century.

The desktop drilling machine NS-12 has several modifications (NS-12, NS-12A, NS-12B, NS-12M), which differ slightly from each other in design and configuration.

The most famous manufacturers of the desktop drilling machine model NS-12a are Vilnius Machine Tool Plant "Zalgiris", Vilnius Machine Tool Plant "Komunaras", Zvenigorod DVK and etc.

NS-12A desktop 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.

The main parameters of the drilling machine ns-12a:

• Maximum drilling diameter: Ø 12 mm
• Maximum drilling depth: 100 mm
• Maximum workpiece height: 400 mm
• Distance from the spindle axis to the column (spindle overhang): 200 mm
• Spindle speed: 450, 710, 1400, 2500, 4500 rpm
• Motor power: 0,65 kW
• Machine weight: 120 kg

Spindle assembly drilling machine ns-12 - the most complex and accurate unit in the machine. The spindle assembly is mounted in the headstock. The main details of the spindle assembly:

• Spindle- a shaft that rotates on 2 angular contact bearings inside the spindle sleeve;
• Spindle sleeve (quill)- a cylinder, which is mounted in the headstock and has the possibility of axial movement within 100 mm.

The upper part of the spindle is splined to receive rotation from the take-up pulley, the lower part has a Morse taper for mounting the drill chuck.

The spindle of the NS-12a machine receives five speeds of rotation from five-speed drive pulleys, which provides a choice of cutting speeds in the range - 450, 710, 1400, 2500, 4500 rpm.

Spindle end- outer Morse taper KM2, designation B18 according to GOST 9953 (Shortened tool cones) - shortened cone: D = 17.780 mm, cone length 37.0 mm.

A shortened cone B18 corresponds to a drilling three-jaw chuck of the 16th standard size according to GOST 8522 (Three-jaw drilling chucks) with a clamping range of 3 to 16 mm.

An example of a symbol for a 3-jaw drill chuck, size 16, with a B18 taper connection:

Cartridge 16-B18 GOST 8522-79

Morse taper tool shortened

Tool cone - Morse cone - one of the most widely used tool mounts. Introduced by Stephen A. Morse around 1864.

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

Standards for Morse taper: 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 taper has proven to be excessive. Therefore, a standard was introduced for nine standard sizes of short Morse tapers (B7, B10, B12, B16, B18, B22, B24, B32, B45), these dimensions are obtained by removing the thicker part of the cone. The number in the designation of the short cone is the diameter of the thick part of the cone in mm.

Russian standard for short cones GOST 9953 Tool cones are shortened.

Russian standard for drill chucks GOST 8522 Three-jaw drill chucks.

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

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

Simplicity of a design provides ease of management, reliability and durability of machines.

Reading the depth of drilling is made on a flat scale or stop.

Five-speed drive pulleys allow five spindle speeds to be obtained, which provides a free choice of cutting speeds.

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.

Machine tools NS-12A allow you to perform the following operations:

• drilling
• countersinking
• deployment
• reaming
• threading

Photo of the drilling machine NS-12a

The location of the components of the drilling machine NS-12A

The location of the components of the drilling machine NS-12a

Specification of the components of the drilling machine NS-12A

1. Spindle Column
2. Column and plate
3. Bracket clamp screws
4. Machine drive - electric motor
5. Handle of the clamping device of the headstock on the column
6. The handle of the mechanism for lifting the headstock along the column
7. Headstock
8. Bracket for fastening the column to the stove

General layout and features of the desktop drilling machine NS-12A

The basis of the headstock is a cast-iron body. A spindle assembly, a headstock lifting mechanism, a belt tensioning mechanism and local lighting of the machine are mounted in the body.

An electric motor is attached to the back of the headstock.

The headstock lifting mechanism is designed to move the headstock of the spindle along the column.

The column is attached to the plate with a bracket. In the bracket, the column is clamped with two bolts. If it is necessary to rotate the column around its axis, the bolts are released, the column together with the headstock is rotated to the required position, after which the bolts are clamped.

The location of the controls for the drilling machine NS-12A

The location of the controls for the drilling machine NS-12a

Specification of the controls of the machine NS-12A

1. Spindle manual feed handle
2. Handle for moving the headstock along the column
3. The handle for fixing (locking, clamping) the headstock on the column
4. Motor control button

Spindle assembly of the drilling machine NS-12a

Spindle of the drilling machine NS-12a

Spindle of desktop drilling machine NS-12A

Spindle end - external morse taper KM2, designation B18 according to GOST 9953 (Tool cones shortened) - shortened cone: D = 17.780 mm, cone length 37.0 mm.

The spindle assembly is mounted in the housing 8. The spindle 1 itself is mounted in the sleeve 4 on ball bearings 3 and 7.

The spindle receives rotation from the sleeve 9 and the pulley 10 through a spline connection.

Spindle feed - manual; is carried out by rotating the steering wheel with the help of a gear roller 6 and a sleeve with a rack 4.

Nut 2 is designed to remove the drill chuck from the spindle taper.

Machine drive NS-12A

The electric motor, by means of a sub-engine plate, is attached to the spindle head. On the axis of the electric motor there is a stepped pulley, which is connected to the spindle pulley with a V-belt.

Local lighting machine NS-12A

The machine is equipped with equipment for local lighting. Due to the fact that the desktop drilling machine, model NS-12A, is most often installed on workbenches or tables, therefore, the armature (bracket) and apparatus (transformer) of local lighting, when installing the machine, must be attached near the machine, and if the machine is installed at walls - then to the last.

Kinematic diagram of the drilling machine NS-12A

Kinematic diagram of the drilling machine NS-12a

Electrical equipment and electrical circuit of the drilling machine NS-12A

The electrical circuit of the drilling machine NS-12a

NS-12A desktop drilling machine. Video.

Technical characteristics of the machine NS-12A

Parameter name	2M112	NS-12A
Main parameters of the machine
Maximum 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 (outreach), mm	190	185
Desktop
Table working surface width, mm	250	360 x 360
Number of T-slots Dimensions of T-slots	3	3
Spindle
The greatest movement of a spindle head, mm		300
Spindle sleeve stroke, mm	100	100
Spindle speed, rpm	450, 800, 1400, 2500, 4500	450, 710, 1400, 2500, 4500
Number of spindle speeds	5	5
Spindle taper	Morse B18	Morse B18
Drive unit
Main drive electric motor, kW	0,55	0,65
Dimensions and weight of the machine
Machine dimensions (length width height), mm	795 x 370 x 950	770 x 465 x 700
Machine weight, kg	120	121

The universal desktop drilling machine NS-16 is designed and manufactured in accordance with the requirements of the Ministry of Defense of the Russian Federation for premises of limited height (KUNG), in harsh conditions of transportation by road off-road.

With small dimensions and weight, it has an internal Morse taper M2, which allows, if necessary, to install a cartridge from B6 to B16 (drilling diameter from 0.5 to 16 mm). Using drills with a taper shank allows you to confidently drill holes up to 22mm.

There are no analogues on the Russian market.

At the request of the customer, it is completed with a vice, clamping equipment, as well as a set of high-performance drills.

The electrical equipment is installed on the traverse, which, when using coolant, prevents personnel from getting under the action of a voltage hazardous to health.

When used in conveyor lines and rooms not limited in height, the stroke of the traverse can be doubled.

The scope of the machine is quite wide: it is acquired by technical universities, vocational schools, industrial enterprises and support repair bases of the Ministry of Defense of the Russian Federation.

The machine corresponds to the accuracy class "H".

Working space dimensions HC16

Landing and connecting bases of the HC16 machine

Components of the machine

1. Plate;
2. Rack;
3. Rail;
4. Traverse;
5. Belt drive cover;
6. Electric motor sled;
7. Brake bar;
8. clamping screw;
9. Tension screw;
10. Remote controller;
11. Shaft - rack and pinion;
12. Electric motor;
13. block of electrical equipment;
14. Lid;
15. return spring;
16. Gear shaft;
17. Quill movement handle;
18. Limbo;
19. Nut-lamb;
20. Pulley;
21. Slotted bushing;
22. Cup;
23. Spindle;
24. Pinole;
25. Special nut (with left-hand thread);
26. Ring;
27. Stuffing box.

The device of the machine HC16

Structurally, the NS-16 machine is mounted on a cast plate 1, on which stand 2 with rail 3 is fixed.

It moves along the rack with the help of the rack and pinion shaft 11 of the traverse 4. The brake bar 7 prevents spontaneous movement of the traverse along the rack, the clamp of which is regulated by the screw 8. In the traverse 4 there is a spindle assembly, consisting of the spindle 23 itself and the quill 24.

The spindle 23 with its lower end is fixed through the bearings in the quill 24 with the help of a nut 25 (with left-hand thread), a ring 26 and an oil seal 27. The upper splined end of the spindle 23 through the sleeve 21 is connected to the pulley 20 of the belt drive. The sleeve 21 is mounted for rotation through the bearings in the cup 22, rigidly fixed on the traverse 4.

The quill 24 under the influence of the gear shaft 16 through the handles 17 moves in the traverse. The displacement value is reported on the limb 18. The return of the quill 24 with the spindle to the upper position is carried out under the influence of the spring 15, which is connected with the shaft by the gear 16 with its inner end, and with the outer end with the cover 14, which closes through the key on the traverse 4.

On the traverse 4 are installed, with the ability to move under the influence of the screw 9, the sled 6 with the electric motor 12.

In the block of electrical equipment 13 there is an automatic switch and a magnetic starter.

In the remote control 10, fixed on the traverse 4, there are buttons "Start" and "stop".

The casing 5 of the V-belt transmission consists of two removable parts fixed on the traverse with the help of wing nuts 19. To transfer the belt to the required step of the pulleys, it is enough to remove one of the parts of the casing.

The work of the machine NS16

Turn on the machine in the network with the switch in block 13, after starting the machine with the black button, the electric motor 12 is turned on.

The quill moves when the gear shaft 16 rotates with the help of the handle 17.

The countdown of the vertical movement during drilling is carried out according to the dial 18.

Changes can be made to the design of the machine that do not affect its performance and are not reflected in this instruction manual.

The electrical circuit of the machine NS-16

The desktop drilling machine NS-12 was developed by the Vilnius machine-tool plant "Zalgiris". It differs from similar equipment in its simple layout, reliability and sufficiently accurate material processing parameters.

Machine design

This model is designed to form holes in small workpieces from various materials: steel, wood, polymers. If there is a tap, threads can be cut. It has found application in a complete set of repair shops, is widely popular among home craftsmen.

The design consists of a desktop, which acts as a base. On its surface there are polished T-shaped grooves for fixing the workpiece. A vertical column is installed on the frame, in the upper part of which electrical equipment, a spindle head and shafts for switching the number of revolutions are mounted.

The passport describes in detail the design features of the desktop machine NS-12. They are as follows:

• use of cast iron cases. This ensures a long period of maintenance-free operation of the equipment;
• convenient system for changing the spindle speed. To do this, pulleys of various diameters are installed on the shaft of the headstock and the electric motor. The drive is carried out using a belt drive;
• processing accuracy provides a report of the depth of drilling on the stop or on a flat scale.

The original belt drive tensioning system makes it possible to change gears. But for this it is necessary to wait for the complete stop of the electric motor. To drive the headstock on the NS-12A machine, you can install flat and toothed belts.

During work on the equipment, a protective cover is installed on the shaft with spindle pulleys without fail. This will prevent dangerous situations from occurring.

Specifications

To get acquainted with the exact technical parameters of the machine model NS-12, it is necessary to study the equipment passport. It indicates not only the layout of the elements and characteristics, but also gives recommendations for operation.

The mass of the machine NS-12A 121 kg is enough to dampen the vibrations that inevitably appear during operation. Its dimensions are 77 * 46.5 * 70 cm and allow you to install equipment on a small area of ​​​​the desktop. The motor power is relatively small - 0.65 kW. However, unlike similar models, it is designed to be connected to a single-phase 220 V network, which makes it possible to use the drilling unit at home.

But for a full analysis of the capabilities of a desktop machine, you should carefully study the technical data sheet. Here are the main characteristics of the equipment:

• the maximum allowable drilling diameter is 12 mm;
• distance from the end of the spindle to the surface of the desktop - from 2 to 42 cm;
• spindle overhang - up to 8.5 cm;
• desktop dimensions - 36 * 36 cm;
• number of T-slots for fixing the workpiece - 3 pcs.;
• maximum displacement of the spindle head - 30 cm;
• sleeve travel - up to 10 cm;
• speed options - from 450 to 4500 rpm;
• number of speeds - 5.

These parameters allow drilling and threading with dies with a fairly high accuracy. Before starting work on the NS-12A machine, you need to familiarize yourself with the passport, study the safety rules and the methodology for carrying out repair and preventive measures.

The desktop drilling machine NS-12 was developed by the Vilnius machine-tool plant "Zalgiris". It differs from similar equipment in its simple layout, reliability and sufficiently accurate material processing parameters.

Machine design

This model is designed to form holes in small workpieces from various materials: steel, wood, polymers. If there is a tap, threads can be cut. It has found application in a complete set of repair shops, is widely popular among home craftsmen.

The design consists of a desktop, which acts as a base. On its surface there are polished T-shaped grooves for fixing the workpiece. A vertical column is installed on the frame, in the upper part of which electrical equipment, a spindle head and shafts for switching the number of revolutions are mounted.

The passport describes in detail the design features of the desktop machine NS-12. They are as follows:

• use of cast iron cases. This ensures a long period of maintenance-free operation of the equipment;
• convenient system for changing the spindle speed. To do this, pulleys of various diameters are installed on the shaft of the headstock and the electric motor. The drive is carried out using a belt drive;
• processing accuracy provides a report of the depth of drilling on the stop or on a flat scale.

The original belt drive tensioning system makes it possible to change gears. But for this it is necessary to wait for the complete stop of the electric motor. To drive the headstock on the NS-12A machine, you can install flat and toothed belts.

During work on the equipment, a protective cover is installed on the shaft with spindle pulleys without fail. This will prevent dangerous situations from occurring.

Specifications

To get acquainted with the exact technical parameters of the machine model NS-12, it is necessary to study the equipment passport. It indicates not only the layout of the elements and characteristics, but also gives recommendations for operation.

The mass of the machine NS-12A 121 kg is enough to dampen the vibrations that inevitably appear during operation. Its dimensions are 77 * 46.5 * 70 cm and allow you to install equipment on a small area of ​​​​the desktop. The motor power is relatively small - 0.65 kW. However, unlike similar models, it is designed to be connected to a single-phase 220 V network, which makes it possible to use the drilling unit at home.

But for a full analysis of the capabilities of a desktop machine, you should carefully study the technical data sheet. Here are the main characteristics of the equipment:

• the maximum allowable drilling diameter is 12 mm;
• distance from the end of the spindle to the surface of the desktop - from 2 to 42 cm;
• spindle overhang - up to 8.5 cm;
• desktop dimensions - 36 * 36 cm;
• number of T-slots for fixing the workpiece - 3 pcs.;
• maximum displacement of the spindle head - 30 cm;
• sleeve travel - up to 10 cm;
• speed options - from 450 to 4500 rpm;
• number of speeds - 5.

These parameters allow drilling and threading with dies with a fairly high accuracy. Before starting work on the NS-12A machine, you need to familiarize yourself with the passport, study the safety rules and the methodology for carrying out repair and preventive measures.

Desktop drilling machine NS-12: characteristics and design

The NS-12 drilling machine, the design of which 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 trade and technical schools. Along with the NS-12 model, a number of its modified versions (NS-12A, NS-12B, NS-12M) were also produced, the design and equipment of which differed slightly from the characteristics of the basic equipment.

Appearance of the drilling machine NS-12

Purpose of the machine model NS-12

The drilling machine model NS-12 belongs to the category of desktop equipment. This suggests that it is suitable for processing small parts. The corresponding dimensions and low productivity of the machine make it possible to use it in the repair shops of manufacturing enterprises and small workshops, specialized classes of technical and general educational institutions. You can often find such a device in the equipment of home workshops.

Long service life, ease of use, maintenance and repair of the NS-12 machine are provided by the simplicity of its design. When drilling blind holes on such a machine, their depth can be adjusted on a flat scale or a special stop.

Technical parameters of the drilling machine NS-12 of various modifications

The use of a multi-stage belt drive in a drilling machine makes it possible to obtain five different speeds of rotation of the spindle assembly. What is important, the belt is rearranged 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;
• reaming;
• cutting internal thread.

Overall dimensions and seats (click to enlarge)

Equipment design elements

The design of the drilling machine NS-12 includes the following elements:

• base plate;
• column;
• a trunk on which a spindle group of equipment is mounted;
• electrical equipment.

The location of the components of the machine

The column, which is installed on the base plate, is attached to it using a special shoe. Along the perimeter of the base plate there is a special chute for collecting coolant. From the gutter, the liquid is drained through the bottom hole, which is closed with a screw plug. In the event that 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 the step-down transformer and package switch housing, which is responsible for lighting the treatment 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.

Working table and column for machine NS-12

The vertical movement of the trunk along the column is carried out by means of a rack and pinion gear, consisting of a rack mounted on the column and a gear mounted in the trunk. This movement is controlled by a handle rigidly connected to the gear. Among the controls of the drilling machine there is another handle, with 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 fixed to it and a mechanism for tensioning the drive belts. The spindle itself is installed in the sleeve (quill) of the machine, which can move in the vertical direction.

Machine spindle assembly

The movement of the sleeve, which informs the spindle of the feed movement, is controlled by means of a handle located on the side of the trunk. Smooth and accurate rotation of the spindle is ensured by its installation in supports with precision angular contact bearings. The pulley of the spindle assembly of the drilling machine, which is a five-stage design, is also mounted on two supports with radial bearings.

Scheme of the device of the spindle assembly

The electric motor of the machine is mounted on a special plate and can move along its guides. This design allows the drive belt to quickly loosen when it needs to be transferred to another pulley, as well as quickly tension it when it is necessary to start processing.

How the kinematic diagram of the machine works

The electric motor of the drilling machine rotates a five-stage pulley fixed on its shaft, the torque from which is transmitted by means of a V-belt to the spindle assembly pulley. The vertical movement of the sleeve and, accordingly, the spindle assembly is carried out due to the rack and pinion fixed on it, which is rigidly connected to the corresponding control handle.

Kinematic diagram of the drilling machine HC12

The trunk of the NS-12 drilling machine moves in the vertical direction also due to the rack and pinion gear, the action of which was described above. In the shoe, mounted on the base plate, there is a special clamp, after loosening which you can rotate the column along with the trunk around its axis.

Drawings of pulleys for the NS-12 machine (click to enlarge)

To ensure the safety of the operator, a cast or elongated welded casing is mounted on the belt drive of the drilling machine.

What does the electrical circuit of the device include

Such a characteristic of the machine of this model 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 starts, and the "Stop" button, with which the electric motor is turned off.

The characteristics of the drilling machine provide for the presence of local lighting, which is turned on when the handle of the corresponding package switch is turned. The operation of the local lighting system requires the use of a step-down transformer, which is mounted in the immediate vicinity of the machine.

Electrical diagram of the NS-12A machine (left) and the NS-12B machine (right) (click to enlarge)

When installing the NS-12 machine after its purchase or repair, you should definitely take care of grounding, which will make the operation of the device safe and eliminate the risk of damage due to a short circuit.

The place of installation of the drilling machine of this model, taking into account its small dimensions, is mainly tables or workbenches. At the same time, they must be reliable enough to ensure high stability of the machine during the process of technological operations.

NS-12 desktop drilling machine
Description, characteristics, diagrams

Developer of desktop drilling machine model NS-12 — Special design bureau for special machine tools SKB-3, Odessa- 1947. 90s.

The machine tool was produced by machine tool factories and several trade and technical schools of the Soviet Union in the 50-70s of the last century.

The desktop drilling machine NS-12 has several modifications (NS-12, NS-12A, NS-12B, NS-12M), which differ slightly from each other in design and configuration.

Drilling machines. General information.

Synonyms: drilling machine, bench type drilling machine, center drilling machine, co-ordinate drilling machine, radial drilling machine, deep drilling machine, multi spindle drilling machine, center drilling machine

Drilling machines are designed for drilling, countersinking, countersinking, reaming holes, for trimming the ends of products and cutting threads with taps. They are used mainly in single and small-scale production, and some modifications of these machines - in the conditions of mass and large-scale production.

Kinematic connections of a vertical drilling machine

Basic shaping movements during drilling operations are: the main thing is the rotational movement v and the feed movement s of the machine spindle. The kinematic chains that carry out these movements have independent settings i v and i s . through which the required speed of rotation of the tool and its feed are set.

The main parameters of the machine are the largest hole diameter in steel, overhang and maximum spindle travel.

Drilling machines are divided into

• Desktop drilling machines are used for processing holes with a diameter of up to 16 mm (for example, in instrument making). Desktop machines are built for the largest nominal diameter of drilling holes in steel parts (σ in = 500 ÷ 600 Mn/m2) 3; 6; 12 and 16 mm.
• Vertical drilling machines (column) serve for processing of openings with a diameter - 18; 25; 35; 50 and 75 mm are used to obtain holes in relatively small parts in individual and small-scale production, in repair shops, etc.
• Radial drilling machines for processing heavy and large parts. The overhang of radial drilling machines is 1300 ÷ 2000 mm.
• Coordinate drilling machines are designed for processing holes in conductors, fixtures and parts that require high accuracy in the relative position of the holes. Along with boring, drilling operations, fine milling, marking and checking linear dimensions, in particular center-to-center distances, can be performed on machines.
• Combined drilling and milling machines
• Deep drilling machines(horizontal drilling) are usually used when processing deep holes (for example, in axles, shafts, trunks of rifle and artillery systems, etc.).
• Central machines are used to obtain center holes at the ends of blanks.
• Multi-spindle drilling machines are used for simultaneous processing (mainly drilling) of several holes.

In industry, vertical drilling and radial drilling machines are most widely used.

NS-12 desktop 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.

Simplicity of a design provides ease of management, reliability and durability of machines.

Reading the depth of drilling is made on a flat scale or stop.

Five-speed drive pulleys allow five spindle speeds to be obtained, which provides a free choice of cutting speeds.

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.

Machine tools NS-12 allow you to perform the following operations:

• drilling
• countersinking
• deployment
• reaming
• threading

Analogues of the desktop drilling machine NS-12

2M112— Ø12 — Kirov Machine Tool Plant, Kirov

NS-12A– Ø12 – Vilnius Machine Tool Plant “Žalgiris”

NS-12B, NS-12M

ENC12— Ø12 — Yeysk Machine Tool Plant ESZ, Yeysk

OD71— Ø12 — Orenburg Machine Tool Plant, Orenburg

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

SHUSS-12- Ø12 - Mukachevo Machine Tool Plant, p. Kolchino

GS2112– Ø12 – Gomel plant of machine tools

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

BC3-5016– Ø12 – Voronezh Machine Tool Plant

R175M– Ø12 – Chistopol plant AvtoSpetsOborudovanie, Chistopol

R175, R175M— Ø13 — AutoSpecial Equipment

VI 2-7– Ø14 – Volgograd Tool Plant

MD-23– Ø14 – Kaunas Machine Tool Plant “Neris”

Overall dimensions of the working space, landing and connecting bases of the drilling machine NS-12B

General view of the drilling machine NS-12

The location of the components of the drilling machine NS-12B

Specification of the components of the drilling machine NS-12B

1. Plate
2. Column
3. Trunk (headstock)
4. Sleeve (quill) spindle
5. Spindle
6. Spindle quill feed handle
7. Rack
8. electric motor
9. Electric motor plate (under-engine plate)
10. Belt Tensioner Stopper
11. Shoe (bracket for fastening the column to the plate)

Brief description of the design and operation of the desktop drilling machine NS-12

The machine consists of the following main parts: plate 1; column 2; trunk with spindle group 3; electrical equipment 8.

On the stove shoe 11 is fixed, in the hole of which column 2 is installed. Column secured by tightening the shoe.

Along the perimeter of the plate there is a chute for collecting coolant. At the bottom of the gutter there is a drain hole with a plug. When connecting the machine to a central emulsion supply, instead of a plug, a nipple with a rubber hose can be wrapped.

A step-down transformer and a package switch housing (for local lighting) are mounted inside the plate, and a push-button station (for the machine's electric motor) is outside.

On the column rail 3 is fixed (Fig. 4) (m = 2), in engagement with which is a gear mounted in the trunk, rigidly fixed with handle 4 (see the layout of the controls). When turning the handles 3, 4 (Fig. 6), the trunk moves along the column. After setting the trunk to the required height, the trunk is clamped with handle 3.

on the trunk the spindle group 5, the electric motor 8 with the plate and the tensioner 10 for the V-belt are fixed.

Spindle. unloaded from the pulley, installed in the sleeve 4 (quills) on precision angular contact bearings.

Sleeve moves when turning the handle 6 (Fig. 1).

The transmission of rotation from the pulley to the spindle is carried out using two parallel keys.

Five step spindle pulley fixed with a bushing on two radial bearings.

electric motor It is fixed on the under-engine plate, the guides of which freely enter the corresponding bores in the trunk. After the belt is thrown over the corresponding step of the pulley, this plate is pulled from the trunk to the normal tension of the belt and is fixed in this position by clamping screws.

The location of the controls of the drilling machine NS-12B

Specification of the controls of the machine NS-12

1. Motor shutdown button "Stop"
2. Button for turning on the electric motor "Start"
3. Clamp handle of the trunk (headstock) on the column
4. Handle for lifting and lowering the trunk (headstock) along the column
5. Quill lift handle for manual spindle feed
6. Tensioner clamp screws
7. Local lighting switch

Kinematic diagram of the drilling machine NS-12B

1. Gear rack on the spindle sleeve
2. Gear for moving the spindle sleeve
3. Gear rack on column
4. Gear for moving the trunk (headstock) along the column

Description of the kinematic scheme

From the electric motor, using a V-belt transmission through a five-speed pulley, the machine spindle connected to it by means of keys (and sliding along them) is driven into rotation.

When the handle 5 (Fig. 6) is turned, the gear 2 rotates (Fig. 4), which moves the rack 1 and the sleeve associated with it up and down.

The sleeve, moving in the cavity of the trunk, moves up and down the spindle connected to the sleeve by angular contact ball bearings.

The vertical movement of the trunk is carried out by the action of the gear 4 (Fig. 4), driven by the handle 4 (Fig. 6), on the rail 3 (Fig. 4), mounted on the column.

If necessary, it is possible to rotate the column together with the trunk around its axis after loosening the clamp of the shoe in which the column is fixed.

The belt guard casing is either cast or welded (extended).

Electrical equipment and electrical circuit of the drilling machine NS-12B

Electrical equipment of the drilling machine NS-12B

The electrical equipment of the machine consists of:

1. 0.6 kW electric motor
2. push-button starter with "Stop" and "Start" buttons
3. local lighting with step-down transformer and package switch

Machine control NS-12B

1. By pressing the "Start" button of the KP push-button starter, the electric motor is turned on. By pressing the "Stop" button of the push-button starter of the gearbox, the electric motor is switched off.

2. By turning the handle of the batch switch VO, the local lighting of the LO is turned on. The machine must be grounded.

Machine drive NS-12

The electric motor, by means of a sub-engine plate, is attached to the spindle head. On the axis of the electric motor there is a stepped pulley, which is connected to the spindle pulley with a V-belt.

Local lighting machine NS-12

The machine is equipped with equipment for local lighting. Due to the fact that the desktop drilling machine, model NS-12 is most often installed on workbenches or tables, therefore, the armature (bracket) and apparatus (transformer) of local lighting, when installing the machine, must be attached near the machine, and if the machine is installed at walls - then to the last.

NS-12 desktop drilling machine. Video.

Technical characteristics of the machine NS-12

Drilling machine HC 12A

The NS 12A drilling machine is a well-known brainchild of the Odessa Design Bureau SKB-3 in the post-Soviet space. This unit was produced by several Soviet factories in the 1950s-1970s. The HC12A unit is, in fact, one of the modifications of the model popular at that time. Its main function is to drill holes for various purposes and create threads in cast iron and steel parts, as well as in non-metallic structures and non-ferrous metal blanks.

NS 12A machines were actively used and continue to be used both at large industrial enterprises and in small workshops and workshops. The main advantage of the model is its simplicity of design. The 12A drill press has commendable durability. The unit will also please with its amazing maintainability, which is confirmed by the fact that machines, whose age exceeds half a century, continue to work successfully at various enterprises in our country and neighboring countries.

The HC 12A drilling machine is truly good for its price and functionality. It is easy to operate and does not require any special knowledge or skills from the operator. Moreover, it is characterized by high performance and power.

The engineers involved in the development of this model provided 5 spindle speeds. This allows the machine operator to select the optimal cutting mode depending on the hardness of the material, the thickness of the workpiece and a number of other parameters. The drilling unit HC 12A has a special design of the belt drive tension. This makes it possible to quickly change the position of the belt on the pulleys. All this, of course, is reflected in the speed of work and productivity.

The NS series 12A machine, although an “ancient” machine, can easily cope with countersinking, reaming, reaming and a number of other operations on a par with more “young” counterparts. The unit can be “entrusted” with a wide range of various production tasks, with which it will cope no worse than many modern machines. By the way, about analogues - the drilling machine of the NS 12A brand has more than enough of them. Among the most popular are models 2M112, GS2112 and OD71. All these units are "natives" of the Soviet Union. Model 12A, unfortunately, cannot adequately compete with the equipment produced today by European and Asian companies. However, it remains one of the most affordable used machines on the market.

Design features

The HC 12A drilling machine consists of the following structural elements: a plate, a trunk with a spindle, a column and electrical equipment. The plate is needed to fix the shoe in which the column is mounted. On the plate there is a special discharge chute designed to collect the coolant. A step-down transformer is installed in the plate itself, and outside there is a special push-button module designed to control the operation of the machine. The column of the unit is necessary to fix the rail, to which the gear installed in the trunk clings. A spindle assembly, an electric motor and a tensioning mechanism are fixed on the trunk.

The design of the HC 12A drilling machine is quite simple, which makes it possible to easily replace a failed assembly or part. This is considered a plus of this series in particular and Soviet technology in general.

Specifications

The NS 12A brand machine has decent technical parameters. It is designed for drilling 12 mm holes in metal, which already speaks of its serious capabilities. The machine is equipped with a durable 650-watt electric motor, which ensures the rotation of the spindle head with a maximum intensity of 4500 rpm. The minimum spindle speed in first gear is 450 rpm.

The 12A drilling machine is equipped with a large work table (dimensions are 360x360 mm). At the same time, the dimensions of the machine itself are 770x465x700 mm, and the weight is 121 kg.

This model of the drilling machine is a reliable "workhorse" that does not require significant maintenance costs. Good maintainability and reliability of the main components became the basis for the popularization of the model in the post-Soviet space.

Thus, if you are looking for a budget drilling unit that you can rely on, it is quite possible to consider the HC 12A as a potential object for purchase.

Desktop drilling machine NS12A

Table drilling machine model; ns 12a is used for single or individual production and is designed for drilling blind and through holes with a diameter of up to 12 mm.

Controls of the desktop drilling machine NS 12a

1. Manual spindle feed;
2. Spindle movement along the column;
3. Fixation of the spindle on the column;
4. Motor control handle

The device of the desktop drilling machine NS 12a

The desktop drilling machine includes the following main components:

The headstock is equipped with a spindle unit and a lifting mechanism, which is designed for axial movement of the headstock along the column. The column, in turn, is attached to the plate with a bracket. Turning the column to a certain angle is carried out by releasing the bolts, and after turning to a given angle, subsequent clamping of the bolts.

Kinematic diagram of the desktop drilling machine NS 12a

The electrical circuit of the desktop drilling machine ns 12a

Spindle of desktop drilling machine NS 12a

The spindle assembly is installed in housing 8, and the spindle itself is mounted in sleeve 4 and on two bearings 3 and 7. The spindle receives torque from sleeve 9 and pulley 10.

The manual feed of the spindle is carried out with the help of a handle connected to the gear roller 6 and the sleeve with the rack 4.

To remove the chuck from the spindle taper, use the nut 2.

Setting up and setting up a desktop drilling machine NS 12a

Setting the scale for the drilling depth is carried out as follows: by turning the handwheel 3 bring the cutting tool to the surface of the part and drill to the depth of the conical part of the tool. Then, using screw 5, release clamp 4 on sleeve 6 and set the zero risk of the scale flush with the surface of protrusion 2. Fix the clamp on the sleeve and lower nut 1 opposite the number corresponding to the required drilling depth.

To move the headstock along the column, it is necessary to release the handle 6 and at the same time support the handle 7 to prevent unauthorized lowering of the headstock.

This equipment is a development of the Odessa SKB, the production was launched at several enterprises of the former USSR in the middle of the last century. On the basis of the main model, a number of modifications of the NS-12A, NS-12B, NS-12M were created, with a slight difference in characteristics and configuration. Drilling machine NS-12 performs drilling of holes and threading in parts made of steel, cast iron, non-ferrous metals and alloys, in non-metallic materials. It belongs to the group of desktop machines.

Machine description

It has small dimensions and is installed on a workbench, it allows processing small parts. It is used to equip repair production units, educational and home workshops.

Despite its small size and low performance, it is lightweight and easy to use. Simplicity of a design does accessible maintenance and repair.

The design of the drilling machine NS-12

The machine is convenient to operate, and a simple device increases reliability and durability.

The NS-12 machine has five working spindle speeds. The revolutions of rotation are 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:

• drilling and reaming holes;
• countersink and countersink;
• unroll 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 stroke and overhang of the spindle are the basic parameters of the machine. Equipment descriptions are also easy to find on the Internet or from experienced craftsmen. Any equipment of this type has its own passport, which contains all the technical and specific instructions.

Machine passport

The device of the machine NS-12A

The main structural elements of the desktop drilling machine are:

• base;
• Column;
• trunk with spindle group;
• electric drive;
• governing bodies.

The cast-iron base serves as a support base, and the elements of the electric drive are placed inside the massive plate, including the switch housing, which provides illumination of the working area and a step-down transformer.

A push-button station for turning on the equipment is placed on the front panel of the base. In the upper part of the base there is a working table for installing, fixing fixtures and parts.

A chute is made along the perimeter contour to accumulate the cooling liquid used in 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 on the base plate with a special shoe and bolted. When it is necessary to rotate the column around the axis, the bolts are released, the column together with the upper part is set to 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.

Behind the body, an electric motor is suspended on a sub-engine plate.

He will be able to move longitudinally along the guides. The mobility of the engine is necessary to reduce the tension of the drive belt when adjusting the spindle speed. When the belt is placed in the groove of the pulley, the motor returns to its place and the required tension is provided.

Rise and lowering of the trunk along the column is provided by rack and pinion. The gear rack is firmly fixed on the column, and the drive gear is in the trunk. The vertical movement is controlled manually through the handle, which has a rigid connection with the gear. The second lever is located near the column and fixes the position on the column, this happens at the required height above the table.

The spindle is mounted on the cantilever part of the trunk in the quill of the machine, movable in the vertical direction.

The movement of the quill, which transmits the feed movement to the spindle, is performed by a handle located on the side of the trunk. The spindle of the NS-12A drilling machine is placed in bearings with precision angular contact bearings, they provide movement accuracy and smooth running. The control pulley is made in the form of a five-stage design and is installed in bearings with radial bearings.

To control the depth of drilling blind holes allows the use of 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.

The control of the machine is quite simple:

• to turn it on, you must press the "Start" button on the button starter panel;
• the inclusion is accompanied by the start of the electric motor;
• the machine is ready to work, and to stop the work, press the "Stop" button. The power will turn off and the motor will stop. If necessary, local lighting is switched on by turning the package switch toggle switch.

Unit control

The list of controls for the NS-12A drilling machine:

• power button "Start";
• shutdown button "Stop";
• handle for turning on the lighting;
• lever for vertical movement of the trunk along the column;
• tensioner clamps;
• handle for controlling the movement of the quill for manual feed;
• handle for fixing the position of the trunk.

The handle fixing the position of the trunk

local lighting

The machine is completed with the necessary equipment for connecting local lighting. The place for installation is selected depending on the place of installation.

Most often, craftsmen choose a workbench or a monolithic table as a place for mounting 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 the equipment against a wall, it is convenient to place a mount on it.

The presented model of the drilling machine is considered reliable equipment with a clear control algorithm. The model is highly maintainable and does not require high maintenance costs.

A popular and budget model will be an ideal assistant in the following areas:

• auto repair shop;
• mini workshop;
• technical school laboratory.

Video: Drilling machine NS-12A