INTERSTATE STANDARD

SPINDLE ENDS
DRILLING, BORING
AND MILLING MACHINES

DIMENSIONS. TECHNICAL REQUIREMENTS

INTERSTATE COUNCIL
ON STANDARDIZATION, METROLOGY AND CERTIFICATION

Minsk

Foreword

1 DEVELOPED by Gosstandart of Russia

INTRODUCED by the Technical Secretariat of the Interstate Council for Standardization, Metrology and Certification

2 ADOPTED by the Interstate Council for Standardization, Metrology and Certification on October 21, 1993

State name	Name of the national standardization body
Republic of Belarus	Belstandard
Republic of Kyrgyzstan	Kyrgyzstandart
The Republic of Moldova	Moldovastandard
The Russian Federation	Gosstandart of Russia
The Republic of Tajikistan	Tajikstandart
Turkmenistan	Turkmenglavstate inspection
	State Standard of Ukraine

3 Standard meets international standard ISO 297-88 for 7:24 taper spindle ends and key sizes used in their construction

4. Dimensions in brackets are for machines designed before 01/01/94.

Table 1

Dimensions, mm

		D 1 at least
						prev. off
Metric

Notes:

1. Dimensions D, d, d 1 , l 1 , l 2 , g, h- according to GOST 25557.

3. The shape and size of the hole d 1 for machines with mechanized tool clamping are not regulated.

Version 3

table 2

Dimensions, mm

Version 4

Version 5

Version 6

Version 7

Version 8

* For machines with manual tool change, it is allowed to take the maximum deviation of the position of the main plane relative to its theoretical position equal to ±0.4 mm.

1 - dowel; 2 - screw according to GOST 11738; 3 - pin according to GOST 3128

Table 3

Dimensions, mm

Execution

Dimension values ​​for spindle end taper

at least

3rd row (tolerance h5)

D2(tolerance Js12)

d 1 , at least

d 2 (tolerance range H12)

L at least

l 2 , not less

FROM, not less

m, not less

n, no more

E/2, not less

(tolerance field M6)

Key (pos. 1) (tolerance h5)

r, no more

(offset limit ±0.2)

M6 - 6g × 16.56.05

M8 - 6g × 20.56.05

M10 - 6g × 30.56.05 M12 - 6g × 25.56.05

М16 - 6g × 35.56.05 (M12 - 6g × 45.56.05

М16 - 6g × 55.56.05 (M12 - 6g × 45.56.05

М20 - 6g × 45.56.05

M20 - 6g × 65.56.05 (M20 - 6g × 60.56.05

M6 - 6g × 25.56.05

M8 - 6g × 25.56.05

М10 - 6g × 35.56.05 M12 - 6g × 30.56.05

Notes:

1. 1st row size D 1 - for ends of spindles with keys (pos. 1) made in contact with the spindle, or with screwed keys, having a maximum length reduced compared to that indicated in table. 4 and sized D 1 .

2nd size row D 1 - for the ends of spindles with screwed keys, the dimensions of which correspond to those indicated in table. 4.

3rd size row D 1 - for the ends of spindles with threaded keys and the possibility of fixing the tool based on the outer diameter of the spindle.

2. For machines with automatic tool changer dimensions d 1 , d 2 And L as well as threaded holes d 3 are not regulated.

3. It is allowed to increase the length of the screw and the size l up to the values ​​determined by the calculation.

4. For spindle ends with dimensions D 1 according to the 1st row of dimension values D 2 And f are not regulated.

5. It is allowed to manufacture the ends of spindles of version 5 without locking pins (pos. 3) and with threaded holes d 3 at the end of the spindle.

6. Dimension values a, a 1 d 4 , l 1 are recommended.

7. It is allowed to use screws (pos. 2) in accordance with GOST 11738 with mechanical properties, corresponding to strength class 6.8 according to GOST 1759.4 , coated 06 according to GOST 1759.0 .

8. It is allowed to make the ends of the spindles of machines with a manual tool change with a thread on the outer surface for fixing the tool.

Example symbol spindle end version 1 with Morse taper 1:

The same, version 1 with metric cone 80:

The same, version 5 with cone 30:

5. Keys (pos. 1) used in the designs of the ends of spindles of versions 4 - 8 must be made of the following versions:

1 - for ends of spindles of executions 4 and 6;

2 - for ends of spindles of version 5;

3 - for ends of spindles of executions 7 and 8.

The design and dimensions of the keys must correspond to those indicated in Fig. 4 and in table. 4.

Table 4

Dimensions, mm

Spindle end taper designation

b(tolerance h5)

l, no more

l 2 (offset limit ±0.1)

from, no more

Versions 1 and 3

Execution 2

Versions 1 and 3

Execution 2

Versions 1 and 3

Execution 2

prev. off -0.2

Notes:

1. Dimension values d 2 , h 3 , l 3 are recommended.

2. In technically justified cases, it is allowed to increase the size l within the dimension determined by the values D 1 according to the table. 3.

An example of the key designation of execution 1 for the end of the spindle with a taper 30:

6. Unspecified limit deviations of dimensions: holes - according to H14, shafts - according to h14, others -.

7. The degree of accuracy in the manufacture of spindle cones must correspond to that indicated in Table. five.

Table 5

Degree of spindle taper accuracy

GOST 9953, as well as the spindle taper according to GOST 25557 must comply with GOST 2848. Tolerances of the angle and shape of the spindle taper according to GOST 15945 must comply with GOST 19860. 9. The surface hardness of the ends of spindles with tapers 30 and 40 and Morse tapers 0 ... 4 should not be lower than 55 HRC e, for the remaining ends of the spindles 58 ... 64 HRC e (except for threads). 10. Key hardness - 30 ... 40 HRC e. INFORMATION DATA REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

Engineering. GOST 30064-93: Spindle ends of drilling, boring and milling machines. Dimensions. Technical requirements. OKS: Mechanical engineering, Metal-cutting machines. GOSTs. Spindle ends for drilling, boring and milling.... class=text>

GOST 30064-93

Spindle ends of drilling, boring and milling machines. Dimensions. Technical requirements

GOST 30064-93
Group G81

STATE STANDARD OF THE RUSSIAN FEDERATION

SPINDLE ENDS FOR DRILLING, BORING AND MILLING MACHINES

Dimensions. Technical requirements

Spindle noses of drilling, boring and milling machines. dimensions. technical requirements

Introduction date 1995-01-01

Foreword

1 DEVELOPED by Gosstandart of Russia
INTRODUCED by the Technical Secretariat of the Interstate Council for Standardization, Metrology and Certification

2 ADOPTED by the Interstate Council for Standardization, Metrology and Certification on October 21, 1993
Voted to accept:

State name	Name of the national standardization body
Republic of Belarus	Belstandard
Republic of Kyrgyzstan	Kyrgyzstandart
The Republic of Moldova	Moldovastandard
the Russian Federation	Gosstandart of Russia
The Republic of Tajikistan	Tajikstandart
Turkmenistan	Turkmenglavstate inspection
Ukraine	State Standard of Ukraine

3 The standard corresponds to the international standard ISO 297-88* in terms of the dimensions of the ends of spindles with a 7:24 taper and the dimensions of the keys used in their designs
_______________
* Access to international and foreign documents mentioned here can be obtained by clicking on the link to the site http://shop.cntd.ru. - Note of the database manufacturer.

4 INTRODUCED TO REPLACE GOST 24644-81 in terms of spindle ends

INFORMATION DATA

REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

	Item number
GOST 8-82
GOST 1759.0-87
GOST 1759.4-87
GOST 2848-75
GOST 3128-70
GOST 9953-82
GOST 11738-84
GOST 15945-82
GOST 19860-93
GOST 25557-82

1. This standard applies to the ends of the spindles of all types of universal drilling, boring and milling machines with conical seating surfaces.
The requirements of the standard are mandatory, with the exception of paragraphs 2-8, notes to table 3, notes to table 4.
Spindle ends of special designs are selected by agreement between the manufacturer and the consumer.

2. The ends of the spindles of drilling, boring and milling machines must be made:
With Morse tapers and metric versions*:
_______________
* The text of the document corresponds to the original. It should read: "executions". - Database manufacturer's note.

1 - for installing the tool shank with a foot.

2 - for installing a tool shank with a threaded hole.

3 - for installing a tool shank with a threaded hole using a face key.
Tapered 7:24 versions:

4 - with a cone from 30 to 70;

5 - with a cone from 30 to 50;

6 - with a cone from 30 to 60;

7 - with a cone 60;

8 - with a cone from 65 to 80.
With external shortened Morse taper B10, B12, B18.

3. The main dimensions of the ends of the spindles of executions 1 and 2 must correspond to those indicated in drawing 1 and in table 1, execution 3 - in drawing 2 and in table 2, executions 4-8 - in drawing 3 and in table 3 .
The main dimensions of the ends of the spindles with an external shortened Morse taper B10, B12, B18 - according to GOST 9953.

4. Dimensions in brackets are for machines designed before 01/01/94.

Damn.1. The main dimensions of the ends of the spindles of executions 1 and 2

Damn.1

Table 1

Dimensions, mm

		Not less than
						prev. off
Metric

Notes:

1. Dimensions , , , , , , - according to GOST 25557.

2. Size - according to GOST 2848.

3. The shape and dimensions of the hole for machines with mechanized tool clamping are not regulated.

Damn.2. The main dimensions of the ends of the spindles of executions 3

Damn.2

table 2

Dimensions, mm

Spindle end taper designation			Not less than	Not less than	Not less than	(tolerance field H5)
Metric

Damn.3. The main dimensions of the ends of the spindles of executions 4-8

________________
* For machines with manual tool change, it is allowed to take the maximum deviation of the position of the main plane relative to its theoretical position equal to ±0.4 mm.

1 - dowel; 2 - screw according to GOST 11738; 3 - pin according to GOST 3128
Damn.3

Table 3

Dimensions, mm

Is- floor- not- nie

Dimensions

3Dimensions for spindle end taper

3rd row (tolerance h5)

(tolerance Js12)

M16 (M12)

Not less than

(tolerance field H12)

M24 (M20)

M30 (M24)

Not less than

Not less than

Not less than

Not less than

No more

/2, not less

Groove (tolerance field M6)

Key (pos.1) (tolerance h5)

No more

(offset limit ±0.2)

106 (109)

Screw (pos.2) according to GOST 11738

М6-616.56.05

М8-620.56.05

М10-630.56.05; М12-625.56.05

М16-635.56.05 (M12-645.56.05)

М16-645.56.05 (М12-645.56.05)

М20-655.56.05

М20-665.56.05 (М20-660.56.05)

М6-625.56.05

М8-625.56.05

М10-635.56.05; М12-630.56.05

Notes:

1. 1st row of size - for the ends of spindles with keys (item 1) made integral with the spindle, or with screwed keys having a maximum length reduced compared to that indicated in Table 4 and determined by the size.
2nd size row - for the ends of spindles with screwed keys, the dimensions of which correspond to those indicated in Table 4.
3rd size row - for the ends of spindles with threaded keys and the possibility of fixing the tool based on the outer diameter of the spindle.

2. For machines with automatic tool change, dimensions , and , as well as threaded holes are not regulated.

3. It is allowed to increase the length of the screw and the size up to the values ​​determined by the calculation.

4. For the ends of spindles with dimensions according to the 1st row, the values ​​of the dimensions and are not regulated.

5. It is allowed to manufacture the ends of spindles of version 5 without locking pins (pos.3) and with threaded holes in the end of the spindle.

7. It is allowed to use screws (item 2) in accordance with GOST 11738 with mechanical properties corresponding to strength class 6.8 in accordance with GOST 1759.4, with coating 06 in accordance with GOST 1759.0.

8. It is allowed to make the ends of the spindles of machines with a manual tool change with a thread on the outer surface for fixing the tool.

An example of the symbol for the end of the spindle version 1 with Morse taper 1:

Spindle end 1-1To GOST 30064-93

The same, version 1 with metric cone 80:

Spindle end 1-80M GOST 30064-93

The same, version 5 with cone 30:

Spindle end 5-30GOST 30064-93

5. Keys (item 1) used in the designs of the ends of spindles of executions 4-8 must be made of the following executions:

1 - for ends of spindles of executions 4 and 6;

2 - for ends of spindles of version 5;

3 - for ends of spindles of executions 7 and 8.
The design and dimensions of the keys must correspond to those indicated in Fig. 4 and in Table 4.

Damn.4. Key design and dimensions

Damn.4

Table 4

Dimensions, mm

Designation spinning end taper dividing

(tolerance h5)

No more

(offset limit ±0.1)

Sky- more

Execute- definitions 1 and 3

Execute- 2

Execute- definitions 1 and 3

Execute- 2

Execute- definitions 1 and 3

Execute- 2

no more

prev. off -0,2

8,4 (9,0)

13,4 (14,0)

2,0 (1,5)

16,0 (19,0)

Notes:

2. In technically justified cases, it is allowed to increase the size within the dimensions determined by the values ​​in Table 3.

An example of the key designation of execution 1 for the end of the spindle with a taper 30:

Key 1-30 GOST 30064-93

6. Unspecified limit deviations of dimensions: holes - according to H14, shafts - according to h14, others -.

7. The degree of accuracy in the manufacture of spindle cones must correspond to that indicated in Table 5.

Table 5

Machine accuracy class according to GOST 8	Degree of spindle taper accuracy
	Spindle taper according to GOST 9953	Spindle taper according to GOST 25557	Spindle taper according to GOST 15945

________________
* The degree of accuracy for the angle and straightness of the generatrix of the cone.
** Degree of accuracy for cone roundness.
*** The deviation of the cone angle from the nominal size should be set to "minus".

8. Tolerances of the angle and shape of the spindle taper according to GOST 9953, as well as the spindle taper according to GOST 25557 must comply with GOST 2848. The tolerances of the angle and shape of the spindle taper according to GOST 15945 must comply with GOST 19860.

9. The surface hardness of the ends of spindles with tapers 30 and 40 and Morse tapers 0...4 should not be lower than 55 HRC, for the remaining ends of the spindles 58...64 HRC (except for threads).

10. Key hardness - 30...40 HRC.

Modern mechanical engineering puts forward increasingly stringent requirements for the quality of manufactured parts. This technological task can only be achieved by increasing the requirements for the accuracy of metalworking machines with their constant control. These theses fully apply to modern drilling machines. Maintaining the specified accuracy of the equipment makes it possible to ensure a high level of quality in processing parts (in this case, by drilling), increase technological capabilities, facilitate working conditions, and reduce costs. finished products and qualitatively change the indicators of labor productivity at the enterprise in the direction of their significant increase.

Types and principles of operation of drilling machines

The main task for the modernization of machine-building equipment has always been multifunctionality. Modern drilling machines for metal when equipped with additional equipment and tools can handle more than just drilling and reaming holes. The range of operations performed by them is quite wide. It is: countersinking, countersinking, reaming, threading (with a tap), boring holes (with a cutter), smoothing (with roller or ball mandrels).

When choosing one type or another drilling machine the main parameter is the size of the holes (maximum nominal diameter). Significant technological indicators include the movement of the spindle (its overhang, maximum stroke), as well as the speed of the machine.

All of them are divided into the following types in the direction of the drilling itself:

• horizontal drilling - serves to obtain holes of different depths (possibly five times or more exceeding the diameter) when drilling in a horizontal position;
• radial drilling - the principle of its operation is to align the axes of the spindle with the workpiece, while the spindle moves on the traverse in the radial direction with respect to the workpiece, which is fixed motionless;
• vertical drilling - the principle of operation here is to rotate the spindle itself with a tool rigidly fixed in it (feed itself is carried out in a vertical direction). The workpiece is located on the desktop, and the combination of the axes of rotation of the spindle and the workpiece is carried out by moving it.

General indicators that characterize the accuracy of machine tools are regulated by GOST 8-82. It is for this GOST that the following series of indicators is analyzed:

• base (on which the working tool and workpiece are installed);
• the trajectory of movement of the working body, which feeds the workpiece to the cutting tool itself;
• the location of the axes of rotation and the direction of movement of the working bodies that directly feed the workpiece and tool;
• adjusting and motor movements of working bodies;
• coordinate movements (another term is positioning) of these bodies that feed the workpiece to the cutting tool (drill).

Download GOST 8-82

Features of the drilling process and checking the accuracy of drilling equipment

Features of the geometry of the cutting tool (in this case, drills), as well as more difficult working conditions, distinguish the cutting process while drilling from similar metal cutting processes, such as milling, turning or planing. A feature here is the fact that the drill itself is not single-edged (compared to a cutter). This cutting tool is multi-bladed, in the process of its operation two main blades, two auxiliary blades (located on the guide ribbons of the drill itself) and a jumper blade are involved.

Technological features of the drilling process require specific verification of the accuracy of the drilling machine. This procedure is regulated by GOST 370-93 and includes a study of accuracy, taking into account the following nuances:

• general requirements - according to GOST 8-82;
• geometric parameters - according to GOST 22267-76, methods and measurement schemes are regulated;
• set the movable organs in the middle position and fix them;
• study the radial runout of the surface of the centering hole;
• measure the radial runout of the spindle taper itself. Here are the types of beating:
  • internal beat;
  • external beat;
• study the axial runout of the spindle itself;
• examine the end runout of the working surface of the turntable;
• conduct a study of the perpendicularity of the working surface of the table relative to the axis of rotation of the spindle;
• check the perpendicularity of the trajectory of the movement of the spindle itself to the surface of the table;
• for overhead tables, a check is carried out outside the table.

Download GOST 22267-76

Download GOST 370-93

Attention should be paid to the fact that, by mutual agreement with the manufacturer, the consumer has the right to choose only those types of functional checks (compliance with GOST runout and perpendicularity indicators) that are of greatest interest to him and meet his technological requirements. This moment is necessarily documented when placing an order for the manufacture of the machine.

A study of compliance with GOST accuracy standards is carried out for all newly manufactured machines at the manufacturing plant.

Checking drilling machines after repairs

It is absolutely clear that those machines that have undergone major or current repairs must be subjected to a mandatory check for their compliance with accuracy standards in accordance with GOST.

So, after the completion of the repair, the machines first of all undergo an external inspection, then they are checked for accuracy and rigidity. The final stage is the test of operation, both at idle and under workload.

These activities are carried out in the mechanical repair shop on specialized stands in several stages:

1. Visual inspection;
2. Test in unloaded mode (at idle) - here the mechanisms of the main movement are checked sequentially at all values ​​of the spindle speed (controlling the runout). The machine operates at the upper speed limits from one and a half to two hours, until the operating temperature is established for all elements.

Now under study temperature regime, which must meet the following key indicators:

• bearings: ˂ 70°C (sliding)
• ˂ 80°С (rolling);
• oil: ˂ 60°C;
• feed mechanisms: ˂ 50°С.

Next, carefully study the cooling and lubrication systems. During the entire period of the test, the nature of the functioning of the machine must be smooth, without shocks, beats, noise and vibration. In this regard, the performance is considered satisfactory if the noise produced in the unloaded state (at idle) is practically indistinguishable at a distance of more than five meters from the noise source.

When conducting a comprehensive check of the drilling machine, they also study its passport data provided by the manufacturer. The range of permissible deviations of the obtained results from the passport values ​​is 5%.

Load test - this stage makes it possible to determine both the quality of its work and the technological power. This study should be carried out under conditions that would be as close as possible to production conditions (even short-term overloads of up to 25% of the nominal power are allowed).

Under such a load, the machine test continues for some time, but not less than 0.5 hours.

Accuracy and stiffness test - in progress control master with the obligatory presence at the tests of the employees of the mechanical repair shop, who directly carried out the repair. This control includes a study of the geometric accuracy and rigidity (according to GOST) of the machine itself, as well as samples of parts that are machined on it.

In the case when the process of testing a drilling machine after a major or current repair identified shortcomings and defects, then their list is entered into a special technological list of defects with subsequent transfer to a repair team for troubleshooting.

After completing all types of checks, the machine must be degreased, carefully primed and painted. Then it is transferred for further operation to the workshop. In this case, it is necessary to draw up an appropriate act.

The scrupulous methods of checking drilling machines described above are necessary to ensure their uninterrupted and high-quality, according to all the requirements of GOST, work throughout the entire service life.

Drilling desktop machine VSN was produced by the enterprise Kasimov Mechanical Plant No. 8.

VSN table 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 conditions industrial enterprises, repair shops and household workshops.

The main parameters of the drilling VSN machine:

• Maximum drilling diameter: Ø16 mm
• Maximum drilling depth: 100 mm
• Maximum workpiece height: 400 mm
• Motor power: 0.75 kW
• Machine weight: 60 kg

Spindle VSN machine receives 3 rotation speeds from three-stage drive pulleys, which provides a choice of cutting speeds - 450, 1200, 1800 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, from KM0 to KM7 (English: MT0-MT7, German: MK0-MK7). Taper from 1:19.002 to 1:20.047 (taper angle from 2°51'26" to 3°00'52", taper slope from 1°25'43" to 1°30'26") depending on the size.

Standards for Morse taper: GOST 25557 (Tool cones. Main dimensions), ISO 296, DIN 228. In the Russian standard, the KM7 cone is not recommended for use, instead an incompatible metric cone No. 80 is used. Cones made according to inch and metric standards are interchangeable in everything but 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 shortened cones GOST 9953-82 (Tool cones shortened).

1. B7- Morse taper - KM0, D = 7.067 mm;
2. B10- Morse taper - KM1, D = 10.004 mm;
3. B12- Morse taper - KM1, D = 12.065 mm;
4. B16- Morse taper - KM2, D = 15.733 mm;
5. B18- Morse taper - KM2, D = 17.780 mm;
6. B22- Morse taper - KM3, D = 21.793 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.

The original design of the belt drive tension allows you to quickly change the position of the belt on the pulleys to obtain desired speed cutting.

VSN machines allow you to perform the following operations:

• drilling
• countersinking
• deployment
• reaming
• threading

Photo of the VSN drilling machine

Location constituent parts drilling machine VSN

Specification of the components of the VSN drilling machine

1. Cast iron bed
2. Column (rack)
3. Headstock with lifting and clamping devices
4. Spindle
5. Spindle feed and return mechanism
6. electric motor
7. Pulley guard
8. protective screen

General layout and features of the table drilling machine VSN

Machine bed

The bed is at the same time the table of the machine, on which machine vices are installed and fixed to secure the workpieces.

Column

Column - a cylindrical rack with an external cylindrical thread, on which the headstock is mounted. The headstock is raised and lowered along the column with the help of a nut on which it rests. After setting the headstock to the desired height, the headstock is clamped on the column.

Headstock

The basis of the headstock is a cast-iron body. Mounted in the body:

• Spindle assembly
• Headstock lifting mechanism
• headstock clamping mechanism
• Belt tensioner
• Local machine lighting

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.

Spindle assembly table drilling machine VSN

Spindle drilling machine is a multi-stage shaft made of high quality steel. The spindle is an expensive and difficult part to manufacture.

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

The upper end of the spindle is a splined shaft on which the receiving pulley of the belt drive is mounted, from which it receives rotation.

Spindle bearings - rolling bearings, perceive radial and axial load from cutting forces. Particularly accurate and reliable is the front spindle support, since it perceives the main share of the load and transfers directly to the workpiece all the errors of its installation. Angular-contact ball bearings are often used as the front bearing of the spindles of drilling machines, perceiving radial and axial loads. This bearing has a high performance, rigidity, and high speed.

The spindle is mounted in a steel sleeve - quills. The quill moves vertically 100 mm inside the headstock along with the rotating spindle.

Movement (feed) of the quill - manual; is carried out by rotating the handwheel on the axis of which the gear.

VSN machine drive

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 of the VSN machine

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

Electrical equipment and electrical circuit of the VSN drilling machine

Wiring diagram drilling machine VSN

Technical characteristics of the VSN machine

Parameter name	2M112	VSN
Main parameters of the machine
Maximum drilling diameter, mm	12	12; 16
The smallest and largest distance from the end of the spindle to the table	0..400	0..400
Distance from the axis of the vertical spindle to the rack guides (outreach), mm	190
Desktop
Table working surface width, mm	250	250 x 250
Number of T-slots Dimensions of T-slots	3	1
Spindle
The greatest movement of a spindle head, mm
Spindle sleeve stroke, mm	100	100
Spindle speed, rpm	450, 800, 1400, 2500, 4500	450, 1200, 1800
Number of spindle speeds	5	2; 3
Spindle taper	Morse B18	Morse B16
Drive unit
Operating voltage, V	~380	~380
Main drive electric motor, kW	0,55	0,37; 0,55; 0,75
Dimensions and weight of the machine
Machine dimensions (length width height), mm	795 x 370 x 950	290 x 580 x 630
Machine weight, kg	120	60