2N112 tabletop drilling machine. Passport, diagrams, characteristics, description

2N112 tabletop drilling machine. Purpose and scope

2N112 desktop drilling 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 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 2N112 makes it possible to drill the ends of long parts, such as shafts. The shaft diameter is up to one hundred and twenty millimeters, the length is up to a thousand millimeters.

2N112 drilling machine allows you to perform the following operations:

drilling
countersinking
deployment
reaming
thread cutting

The spindle of the 2N112 receives 7 rotation speeds from 4-speed drive pulleys, which provides a choice of cutting speeds in the range from 500 to 4000 rpm.

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

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

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

Cartridge 16-B18 GOST 8522-79

Main technical characteristics of the tabletop drilling machine 2N112

Developer: Molodechno Machine Tool Plant MSZ.
Manufacturer - Training and production workshops of the Perm Mechanical College named after N.G. Slavyanova.

The machine parameters correspond to TU2-024-734 dated March 2, 1967 and GOST 8-53.

Maximum drilling diameter: Ø 12 mm
Maximum drilling depth: 100 mm
Maximum height of the workpiece installed on the work table: 420 mm
Spindle speed limits per minute - (7 steps) 500..4000 rpm
Spindle end - B18 external shortened Morse taper 2 according to GOST 9953
Standard drill chuck - Chuck 16-B18 GOST 8522-79, clamping range 3..16 mm
Electric motor power: 0.6 kW
Machine weight: 120 kg

Morse cone instrumental shortened

Tool taper - Morse taper is one of the most widely used tool mounts.
It was proposed by Stephen A. Morse around 1864. The Morse taper is divided into eight sizes - from KM0 to KM7 (in English: MT0-MT7, in German: MK0-MK7).

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

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

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), Cartridge 8-B12 (1÷8 mm);
B16 - Morse cone KM2 , D = 15.733 mm. Cartridge 10-B16 (1÷10 mm), Cartridge 13-B16 (1÷13 mm);
B18 - Morse cone KM2 , D = 17.780 mm. Cartridge 16-B18 (3÷16 mm);
B22 - Morse cone KM3 , D = 21.793 mm. Cartridge 20-B22 (5÷20 mm);
B24 - Morse cone KM3 , D = 23.825 mm;
B32 - Morse cone KM4 , D = 31.267 mm;
B45 - Morse cone KM5 , D = 44.399 mm.

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

Electrical equipment and electrical circuit of the drilling machine 2M112

Power supply of the drilling machine 2m112 ~380 or ~220 Volts.

Machines manufactured for industrial enterprises and educational institutions have a supply voltage of ~380 V, for mobile workshops - ~220 V. Local lighting has a safe voltage of ~24 V.

All electrical equipment of the machine: switches, transformer, fuses are placed under the work table plate.

Technical characteristics of the electric drive

Type of spindle drive electric motor - AIR714U3 or 4A71A4U3
Electric motor – asynchronous three-phase, with a squirrel-cage rotor, height of the axis of rotation 71 mm, weight 8.4 kg
Spindle drive electric motor power – 0.55 kW
Spindle drive electric motor speed – 1370 rpm

Initial start-up and instructions for installation and operation

When installing, you must first connect the machine (cooling unit) to the general grounding system using a special bolt located on the machine plate (on the machine of the cooling unit tank).

The supply wires are inserted by the customer through the hole located on the back of the machine plate (on the casing of the cooling unit control panel).

The OSZR (coolant) device is connected autonomously to the supply circuit.

The machine (cooling unit) is connected to the power supply using switch Q1.

First, it is necessary to test run the machine at idle, at all speeds sequentially, starting with the lowest spindle speed. During the first period after starting the machine, it is not recommended to work at maximum spindle speed.

Protection

The stack's electrical equipment is protected from short circuits and overloads by fuses F1, F2, F3.

To prevent self-starting of the electric motor, zero protection is applied using contacts of magnetic starters K1 and K2.

Instructions for servicing the electrical equipment of the machine

Electrical equipment was installed using wires of the following colors:

power circuits - black
control circuits - red

To ensure long-term and trouble-free operation of the machine, it is necessary to regularly clean the electric motor, starting and protective equipment from dust, and contacts from carbon deposits; Tighten connections between drives and equipment as necessary.

Electrical diagram of a drilling machine 2m112 at 380V

List of elements for the electrical diagram

Q1 – Switch PKU3-154I-2037U3 TU 16-526.047-74
S1 – Switch KE201U3 used. 5 red “P” TU 16-642.015-84
S2, S3 – Switch KE181U3 used. 2 black “P” TU 16-642.015-84
E1 – Lamp NKP03-60-0.04UH4 TU 16.876.184-86. Lamp M 024-40 GOST 1182-77
Ml – Engine AIR 71 A4U3, 380 V, 50 Hz TU 16-525.564-84 or 4A71A4U3 GOST 19523-81
F1, F2, F3 – Fuse PRS-6U3-P with fuse link PVD1-6U3 TU 16-522.112-74
K1, K2 – Starter PME-041U4 (380 V, 50 Hz) OST 16.0.536.001-72
T, Q2, F4 – Device OSZR-0.04-83UHL3 TU 16-6/1 041-84 (coolant)

It is possible to replace components without compromising the quality of the machine.

Electrical diagram of a drilling machine 2m112 at 220V

Control panel for drilling machine 2m112

Installation of the electrical circuit of a drilling machine 2m112

Spindle head of drilling machine 2N112

Spindle head of drilling machine 2n112

Device Features

Despite the relatively small size and low power of the 2m112 product, frequent and long-term operation of the unit is allowed. High performance of the machine is achieved through simple design solutions that ensure greater operating efficiency of the unit.

The main parts of the machine are the spindle head, which moves using a separate device in the vertical direction along the column. It is fixed on it with a special device that acts as a clamp. The electric motor transmits torque to a system of pulleys, which, in turn, are connected to the chuck through a shaft. The pulley system provides different power and rotation speed of the chuck. A special casing covers the pulley system and the entire drive. The slab serves as a support for the column. The upper part of the stove serves as a work table.

Technical characteristics of the machine 2N112

Parameter name	2M112	2N112	2N115pm
Basic machine parameters
Largest nominal drilling diameter, mm	12	12	15
The smallest and largest distance from the end of the spindle to the table	0…400	70..420	70..520
Distance from the axis of the vertical spindle to the rack guides (overhang), mm	190	160	160
Desktop
Width of the working surface of the table, mm	250 x 250	250 x 250	250 x 250
Number of T-slots	3	3	3
Spindle
Maximum movement of the spindle (drilling) head along the column, mm	250	350
Spindle sleeve stroke, mm	100	100	100
Spindle speed, rpm	450, 800, 1400, 2500, 4500	500, 710, 1000, 1400, 2000, 2800, 4000	500, 710, 1000, 1400, 2000, 2800, 4000
Number of spindle speeds	5	7	7
Spindle taper	Morse B18	Morse B18	Morse B18
Drive unit
Main motion drive electric motor, kW (rpm)	0,55	0,6 (1350)	0,8 (1350)
Dimensions and weight of the machine
Machine dimensions (length width height), mm	795 x 370 x 950	785 x 465 x 795	785 x 465 x 895
Machine weight, kg	120	120	130

Bibliography

Barun V.A. Working on drilling machines, 1963
Vinnikov I.Z., Frenkel M.I. Driller, 1971
Vinnikov I.Z. Drilling machines and work on them, 1988
Loskutov V.V Drilling and boring machines, 1981
Panov F.S. Working on CNC machines, 1984
Popov V.M., Gladilina I.I. Driller, 1958
Sysoev V.I. Handbook for a Young Driller, 1962

Kinematic diagram of a table-top vertical drilling machine 2M112.

The kinematic diagram of the 2M112 vertical drilling machine is shown in the following figure:

The kinematic diagram of the 2M112 table-top vertical drilling machine with good resolution and quality is given in the 2M112 machine passport, a link to which was given above.

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About the advantages and disadvantages

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

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

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

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

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

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

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