Tabletop drilling machine ns12a. Review and description of tabletop drilling machines Tabletop drilling machine ns 12 m passport

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

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

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

NS-12 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 parameters of the drilling machine NS-12B:

Maximum drilling diameter: Ø 12 mm
Maximum drilling depth: 100 mm
Maximum height of the workpiece: 400 mm
Distance from the spindle axis to the column (spindle overhang): 200 mm
Spindle speed: 450, 710, 1400, 2500, 4500 rpm
Motor power: 0,6 kW
Machine weight: 130 kg

Spindle unit drilling machine NS-12 - the most complex and precise unit in the machine. The spindle assembly is mounted in the spindle head. Main parts of the spindle assembly:

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

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

The spindle of the NS-12 machine receives five rotation speeds from five-stage drive pulleys, which provides free choice of cutting speeds of 450, 800, 1410, 2490, 4430 rpm.

The quill, inside which the spindle rotates, has a stroke of 100 mm and is balanced by a spiral spring, which returns the quill to the upper (original) position. The quill is raised and lowered by a rack and pinion. The greatest cutting force allowed by the mechanism is 70 kg.

Spindle end drilling machine NS-12 - internal Morse cone No. 1, D = 12.065 mm according to GOST 25557 (Tool cones). To install a standard drill chuck with a shortened cone on the machine, you must install mandrel according to GOST 2682 (Mandrels with Morse taper for drill chucks).

On the NS-12 machine you can install one of 4 mandrels in accordance with GOST 2682:

Mandrel 6039·0002 AT 10
Mandrel 6039·0005- version 2, shortened Morse taper AT 12
Mandrel 6039·0007- version 2, shortened Morse taper B16
Mandrel 6039·0011- version 2, shortened Morse taper B18

So, using one of the 4 mandrels, you can install on the NS-12 machine drill chuck in one of 6 standard sizes according to GOST 8522 (Three-jaw drill chucks).

Cartridge 4- shortened Morse taper AT 10, clamping range - 0.5..4 mm
Cartridge 6- shortened Morse taper AT 12, clamping range - 0.5..6 mm
Cartridge 8- shortened Morse taper AT 12, clamping range - 1.0..8 mm
Cartridge 10- shortened Morse taper B16, clamping range - 1.0..10 mm
Cartridge 13- shortened Morse taper B16, clamping range - 1.0..13 mm
Cartridge 16- shortened Morse taper B18, clamping range - 3.0..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.

Five-speed drive pulleys allow five spindle rotation speeds, which provides 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.

NS-12 machines allow you to perform the following operations:

drilling
countersinking
deployment
reaming
thread cutting

Analogues of the desktop drilling machine NS-12

2M112- Ø12 - Kirov Machine Tool Plant, Kirov

NS-12A- Ø12 - Vilnius Machine Tool Plant "Zalgiris"

NS-12B, NS-12M

ENS12- Ø12 - Yeysk machine tool plant ESZ, Yeysk

OD71- Ø12 - Orenburg Machine Tool Plant, Orenburg

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

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

GS2112- Ø12 - Gomel plant of machine components

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

MP8-1655- Ø12 - StankoBuilding Plant named after. Kirov, Minsk

BS-01- Ø12 - Bevers, Berdichev

VS3-5016- Ø12 - Voronezh Machine Tool Plant

R175M- Ø12 - Chistopol AutoSpetsEquipment Plant, Chistopol

R175, R175M- Ø13 - AutoSpetsEquipment

VI 2-7- Ø14 - Volgograd Tool Plant

MD-23- Ø14 - Kaunas machine tool plant "Neris"

Overall dimensions of the working space of the NS-12 machine

General view of the drilling machine NS-12

Location of components of the drilling machine NS-12

Specification of components of the drilling machine NS-12

Plate
Column
Trunk (spindle head)
Spindle sleeve (quill)
Spindle
Spindle quill feed handle
Rack
Electric motor
Electric motor plate (sub-motor plate)
Belt tensioner stopper
Shoe (bracket for fastening the column to the plate)

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

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 trench for collecting coolant. At the bottom of the chute there is a drain hole with a plug. When connecting the machine to a centralized supply of emulsion, 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 is installed outside (for the machine’s electric motor).

On the column a rack 3 is fixed (Fig. 4) (m = 2), in mesh with which there is a gear mounted in the trunk, rigidly fixed to the handle 4 (see diagram of the location of the controls). When turning handles 3, 4 (Fig. 6), the trunk moves along the column. After installing the trunk to the required height, handle 3 clamps the trunk.

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

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

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

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

Five speed spindle pulley secured by a bushing on two radial bearings.

Electric motor fixed on the under-engine plate, the guides of which freely fit into the corresponding bores in the trunk. After the belt is thrown onto the corresponding pulley stage, this plate is pulled from the trunk to the normal belt tension and is fixed in this position with clamping screws.

Location of controls for the NS-12 drilling machine

Specification of controls of the NS-12 machine

Stop button
Electric motor start button
Handle for clamping the trunk (spindle head) on the column
Handle for raising and lowering the trunk (spindle head) along the column
Quill lifting handle for manual spindle feed
Tensioner Clamp Screws
Local lighting switch

Kinematic diagram of the drilling machine NS-12

Rack on spindle sleeve
Gear for moving the spindle sleeve
Gear rack on column
Gear for moving the trunk (spindle head) along the column

Description of the kinematic scheme

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

When handle 5 (Fig. 6) is turned, gear 2 (Fig. 4) rotates, which moves 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 gear 4 (Fig. 4), driven into rotation by handle 4 (Fig. 6), on rack 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 secured.

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

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

Electrical diagram of the drilling machine NS-12

Electrical equipment of the drilling machine NS-12

The electrical equipment of the machine consists of:

electric motor 0.6 kW
push-button starter with “Stop” and “Start” buttons
local lighting with step-down transformer and package switch

Control of the NS-12 machine

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

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

Drive of the machine NS-12

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

Local lighting of the NS-12 machine

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

NS-12 tabletop drilling machine. Video.

Technical characteristics of the NS-12 machine

Parameter name	NS-12	NS-12B	NS-12M
Basic machine parameters
Largest drilling diameter, mm	12	12	12
The greatest distance from the end of the spindle to the table	20..420	100..400	300
Distance from the axis of the vertical spindle to the rack guides (overhang), mm	185	200	200
Desktop
Width of the working surface of the table, mm	360 x 360	300 x 350	300
Number of T-slots Dimensions of T-slots	3	3
Spindle
Maximum movement of the spindle head, mm	300	200
Spindle sleeve stroke, mm	100	100	100
Spindle speed, rpm	450, 710, 1400, 2500, 4500	450, 800, 1410, 2490, 4430	880, 1500, 2880
Number of spindle speeds	5	5	3
Spindle taper	Morse 2	Morse 1	B18
Drive unit
Main motion drive electric motor, kW	0,65	0,6	0,37
Dimensions and weight of the machine
Machine dimensions (length width height), mm	770 x 465 x 700	760 x 470 x 955	810 x 450 x 910
Machine weight, kg	121	130	140

The purpose of the desktop drilling machine model NS 12 is to drill holes with a diameter of no more than 12 mm in small-sized parts made of ferrous and non-ferrous metals.

Device

The benchtop drilling machine consists of the following main components:

Spindle head
Column and plate
Spindle
Drive unit
Local lighting

Design Features

The spindle assembly and lifting mechanism are attached to one side of the spindle head. This mechanism is designed to move the spindle head along the column. An electric motor is attached to the rear of the headstock.

The column is fixed to the slab with a clamp; in the clamp itself, the column is fixed with two bolts. If it is necessary to rotate the column, loosen the clamp of the bolts, turn the column together with the headstock to the required position, after which the bolts are fixed back.

Figure - Drilling machine NS 12

The spindle assembly is located in the headstock housing. The spindle itself is mounted in a sleeve on ball bearings. The spindle rotates from the electric motor drive through a splined connection. The spindle is fed manually by rotating the steering wheel.

The nut is designed to remove the drill chuck from the spindle body.

The electric motor is attached to the spindle headstock by means of a submotor plate. On the axis of the electric motor there is a pulley, which is connected to the spindle pulley by a V-belt. The machine is equipped with local lighting.

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

Machine design

This model is designed for forming holes in small workpieces made of various materials: steel, wood, polymers. If you have a tap, the thread can be cut. It has found application in repair shops and is widely popular among home craftsmen.

The design consists of a work table, which serves 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 NS-12 desktop machine. They are as follows:

use of cast iron bodies. This ensures long term maintenance-free operation of the equipment;
convenient system for changing the spindle speed. For this purpose, pulleys of various diameters are installed on the headstock and electric motor shafts. The drive is carried out using a belt drive;
Precision processing provides a report of the drilling depth on a stop or on a flat scale.

The original belt tension system makes it possible to change gears. But to do this you need to wait until the electric motor stops completely. To drive the spindle head on the NS-12A machine, you can install flat and toothed belts.

When working on the equipment, it is mandatory to install a protective casing on the shaft with spindle pulleys. This will prevent dangerous situations from occurring.

Specifications

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

The weight of the NS-12A machine, 121 kg, is enough to dampen vibrations that inevitably appear during operation. Its dimensions are 77*46.5*70 cm and allow you to install the equipment on a small desktop area. The electric motor power is relatively small - 0.65 kW. However, unlike similar models, it is designed for connection 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. The main characteristics of the equipment are indicated there:

the maximum permissible drilling diameter is 12 mm;
distance from the end of the spindle to the surface of the work table – from 2 to 42 cm;
spindle reach - up to 8.5 cm;
desktop dimensions – 36*36 cm;
number of T-shaped slots for fixing the workpiece – 3 pcs.;
maximum spindle head displacement – 30 cm;
sleeve stroke – up to 10 cm;
rotation speed options - from 450 to 4500 rpm;
number of speeds – 5.

These parameters allow you to drill and form threads using dies with fairly high accuracy. Before starting work on the NS-12A machine, you need to read the passport, study the safety rules and the methodology for carrying out repair and preventative measures.

Tabletop 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 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.

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-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.

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

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.

Overall dimensions and mounting locations (click to enlarge)

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.

Location of machine components

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.

Work table and column for the NS-12 machine

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.

Machine spindle assembly

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.

Spindle assembly diagram

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.

Kinematic diagram of the NS12 drilling machine

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.

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

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.

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 breakdown due to a short circuit.

The installation location for 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 technological operations.

NS-12 tabletop drilling machine
Description, characteristics, diagrams

Developer of the tabletop drilling machine model NS-12 - Special design bureau of special machines SKB-3, Odessa— 1947. 90s.

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

The NS-12 desktop drilling machine 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, 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 are used in 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 rotation speed of the tool and its feed are set.

Main parameters of the machine are the largest diameter of drilling a hole in steel, the offset and the maximum spindle stroke.

Drilling machines are divided into

Tabletop drilling machines used for machining holes with a diameter of up to 16 mm (for example, in instrument making). Tabletop 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) used for processing holes with a diameter of 18; 25; 35; 50 and 75 mm, are used to produce holes in relatively small-sized parts in individual and small-scale production, in repair shops, etc.
Radial drilling machines for processing heavy and large parts. The reach of radial drilling machines is 1300 ÷ 2000 mm.
Jig drilling machines designed for processing holes in jigs, fixtures and parts that require high precision in the relative position of the holes. Along with boring, the machines can perform drilling operations, finishing milling, marking and checking linear dimensions, in particular center-to-center distances.
Combined drilling and milling machines
Deep drilling machines(horizontal drilling) are usually used when processing deep holes (for example, in axles, shafts, barrels of small arms and artillery systems, etc.).
Centering machines are used to obtain center holes at the ends of the workpieces.
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 tabletop drilling machine. Purpose and scope

The simplicity of the design ensures ease of control, reliability and durability of the machines.

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

Five-speed drive pulleys allow five spindle rotation speeds, which provides 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.

NS-12 machines allow you to perform the following operations:

drilling
countersinking
deployment
reaming
thread cutting

Analogues of the desktop drilling machine NS-12

2M112— Ø12 — Kirov Machine Tool Plant, Kirov

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

NS-12B, NS-12M

ENS12— Ø12 — Yeisk machine-tool plant ESZ, Yeisk

OD71— Ø12 — Orenburg Machine Tool Plant, Orenburg

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

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

GS2112— Ø12 — Gomel plant of machine components

ZIM1330.00.00.001- Ø12 - Maslennikov Plant, ZIM-Machine Tools, Samara

MP8-1655— Ø12 — StankoBuilding Plant named after. Kirov, Minsk

BS-01- Ø12 - Bevers, Berdichev

VS3-5016— Ø12 — Voronezh Machine Tool Plant

R175M— Ø12 — Chistopol AutoSpetsEquipment plant, Chistopol

R175, R175M— Ø13 — AutoSpetsEquipment

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 NS-12B drilling machine

General view of the drilling machine NS-12

Location of components of the drilling machine NS-12B

Specification of components of the drilling machine NS-12B

Plate
Column
Trunk (spindle head)
Spindle sleeve (quill)
Spindle
Spindle quill feed handle
Rack
Electric motor
Electric motor plate (sub-motor plate)
Belt tensioner stopper
Shoe (bracket for fastening the column to the plate)

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

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.

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

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

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

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

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

Five speed spindle pulley secured by a bushing on two radial bearings.

Location of controls for drilling machine NS-12B

Specification of controls of the NS-12 machine

Stop button
Electric motor start button
Handle for clamping the trunk (spindle head) on the column
Handle for raising and lowering the trunk (spindle head) along the column
Quill lifting handle for manual spindle feed
Tensioner Clamp Screws
Local lighting switch

Kinematic diagram of the drilling machine NS-12B

Rack on spindle sleeve
Gear for moving the spindle sleeve
Gear rack on column
Gear for moving the trunk (spindle head) along the column

Description of the kinematic scheme

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

When handle 5 (Fig. 6) is turned, gear 2 (Fig. 4) rotates, which moves 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 gear 4 (Fig. 4), driven into rotation by handle 4 (Fig. 6), on rack 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 secured.

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:

electric motor 0.6 kW
push-button starter with “Stop” and “Start” buttons
local lighting with step-down transformer and package switch

Control of the NS-12B machine

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

Drive of the machine NS-12

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

Local lighting of the NS-12 machine

NS-12 tabletop drilling machine. Video.

Technical characteristics of the NS-12 machine

Drilling machine NS 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 1950-1970s. The NS12A unit is, in fact, one of the modifications of the model that was 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 workpieces.

NS 12A machines have been 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 delight you with its amazing maintainability, which is confirmed by the fact that the machines, whose age exceeds half a century, continue to operate successfully at various enterprises in our country and neighboring countries.

The NS 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 who developed 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 NS 12A has a special design for tensioning the belt drive. This makes it possible to quickly change the position of the belt on the pulleys. All this, of course, affects the speed of work and productivity.

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

Design Features

The NS 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. There is a special outlet chute on the plate designed to collect 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 for fixing the rack, 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 NS 12A drilling machine is quite simple, which allows for easy replacement of a failed unit 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 spindle head rotation with a maximum intensity of 4500 rpm. The minimum spindle rotation 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 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, you can consider the NS 12A as a potential purchase.

Bench drilling machine ns12a

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

Controls of the tabletop drilling machine NS 12a

Manual spindle feed;
Spindle movement along the column;
Fixing the spindle on the column;
Electric motor control handle

Design of a tabletop drilling machine ns 12a

The tabletop drilling machine includes the following main components:

The spindle headstock contains a spindle assembly and a lifting mechanism, which are designed for axial movement of the headstock along the column. The column, in turn, is attached to the slab using a bracket. Rotation of the column at a certain angle is carried out by releasing the bolts, and after rotation at a given angle, subsequent clamping of the bolts.

Kinematic diagram of the tabletop drilling machine NS 12a

Electrical diagram of a tabletop drilling machine ns 12a

Spindle of tabletop 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.

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

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

Setting up and setting up a tabletop drilling machine ns 12a

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

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

Machine design

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

use of cast iron bodies. This ensures long term maintenance-free operation of the equipment;
convenient system for changing the spindle speed. For this purpose, pulleys of various diameters are installed on the headstock and electric motor shafts. The drive is carried out using a belt drive;
Precision processing provides a report of the drilling depth on a stop or on a flat scale.

The original belt tension system makes it possible to change gears. But to do this you need to wait until the electric motor stops completely. To drive the spindle head on the NS-12A machine, you can install flat and toothed belts.

When working on the equipment, it is mandatory to install a protective casing on the shaft with spindle pulleys. This will prevent dangerous situations from occurring.

Specifications

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

the maximum permissible drilling diameter is 12 mm;
distance from the end of the spindle to the surface of the work table – from 2 to 42 cm;
spindle reach - up to 8.5 cm;
desktop dimensions – 36*36 cm;
number of T-shaped slots for fixing the workpiece – 3 pcs.;
maximum spindle head displacement – 30 cm;
sleeve stroke – up to 10 cm;
rotation speed options - from 450 to 4500 rpm;
number of speeds – 5.

These parameters allow you to drill and form threads using dies with fairly high accuracy. Before starting work on the NS-12A machine, you need to read the passport, study the safety rules and the methodology for carrying out repair and preventative measures.

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

Controls of the tabletop drilling machine NS 12a

Manual spindle feed;
Spindle movement along the column;
Fixing the spindle on the column;
Electric motor control handle

Design of a tabletop drilling machine ns 12a

The tabletop drilling machine includes the following main components:

Headstock 8;
Column 2;
Spindle 1;
Drive 4

Kinematic diagram of the tabletop drilling machine NS 12a

Electrical diagram of a tabletop drilling machine ns 12a

Spindle of tabletop 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.

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

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

Setting up and setting up a tabletop drilling machine ns 12a

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

Technical characteristics of the tabletop drilling machine NS 12a

Main settings	ns 12a
Largest drilling diameter, mm	12
Distance from the end of the spindle to the plate, mm:
least	20
greatest	420
Spindle outer diameter, mm	17,780
Maximum spindle movement, mm	100
Length of ruler for measuring drilling depth, mm	100
Price of one ruler division, mm	1
The largest vertical movement of the spindle head	300
Maximum rotation angle, degrees	360
Machine dimensions:
length	710
width	360
height	700
Machine weight, kg	87