GOST 19860-93

Group G81.

Interstate standard

Cones internal and exterior taper 7:24

Tolerances

INTERNAL AND AXTERNAL 7:24 TAPERS.
Tolerances.

OX 25.080 *
OKP 39 0000.

* In the Signator "National Standards" 2006
OX 25.080.01. - Note.

Date of introduction 1996-01-01

Preface

1 developed by the Russian Federation

Submitted by the Technical Secretariat of the Interstate Council on Standardization, Metrology and Certification

2 Adopted by the Interstate Council on Standardization, Metrology and Certification 15.03.94

3 Resolution of the Committee Russian Federation according to standardization, metrology and certification of 28.06.95 N 329 Interstate standard GOST 19860-93 was performed directly as state Standard Of the Russian Federation from January 1, 1996

4 Instead of GOST 19860-74

1 AREA OF USE

1 AREA OF USE

This standard applies to cones according to GOST 15945 with a taper 7:24 with a designation from 30 to 80 and sets the tolerances of the angles and the shape of the cones from 3 to 7 the degree of accuracy.

The requirements of this standard are mandatory.

2 Regulatory references

GOST 8908-81 The main norms of interchangeability. Normal angles and tolerances

GOST 15945-82 Cones internal and exterior taper 7:24. Dimensions

3 Tolerances Angle and Form Cones

3.1 Dimensions and tolerances of the angles of external and internal cones should correspond to the indicated in the figure and in Table 1.

________________
* Size for references.

** - base cone is set in standards for specific products

1 - the main plane; 2 - Basic plane

Table 1

Dimensions in millimeters

Converse cone - according to GOST 15945 with the addition of the degree of accuracy of the cone for this standard, for example:

Cone 50 AT5 GOST 15945-82

3.2 The limit deviations of the base concess should be chosen from the range: ± 0.4; ± 0.2; ± 0.1; ± 0.05 mm.

3.3. Tolerances forms of cones must match the specified in Table 2.

table 2

Often the buyer, ordering an auxiliary tool for the machine, is convinced that by specifying when ordering "Spindle with SK40 cone", he will surely receive what he wants. When the tool bought is not suitable for the machine, the customer is extremely surprised: "How so, I used to buy a" mandrel of SK40 with a cone 7:24 "and there were no problems, and now I bought" the same "SK40, and he suddenly Not suitable. " Let's try to figure out the situation.

The customer is right at the same time and is wrong. The main problem is in the designation itself. SK letters indicate only the taper of the mandrel shank and are a reduction from the German Steilkel - a steep cone. Under the steep cone, in this case, mandrels are understood with a taper 7:24. Thus, indicating when ordering SK, the customer defines only the type of shank. Other common types of shanks in machine tool is a short horsk horsk cone, Morse Cone MK, modular Systems km and Capto. The number 40 indicates the size of the shank. In this part, the reserve all pointed out correctly. Its error is that in addition to the type and size of the shank, it is necessary to specify the standard for which the shank is made.
In the USSR, there was GOST 25827-83 "Tool shanks with a cone 7:24." Due to the fact that this GOST did not comply with any of the existing international standards, in 1992 he was revised. Many significant changes and additions were made - and it began to fully comply with the standard ISO 7388 / 1-83. New Russian number - GOST R 50071-92, was appropriated. At the same time, the old GOST 1983 was absolutely "lost", as a result of which in 1993 he was once again revised. It was decided to return the old one, usual number GOST 25827, and the Russian GOST R 50071-92 (which was released "instead of GOST 25827-83 and GOST 24644-81 in terms of mandrels with a cone 7:24") canceled. Thus, in Russia today there is only one GOST 25827-93 "Tool shanks with a cone 7:24".
Three versions of shanks are standardized in this guest:

1. Shanks for "execution 1" are used for machine tools with manual change tool and correspond to DIN 2080.
2. According to "Execution 2" - for machine tools with automatic change tool, comply with ISO 7388 / 1-83 standard, which coincides with DIN 69871.
3. According to "Performance 3" (also for automatic tool change), no Western counterparts do not meet: "Tool with shanks for equipment up to 01.01.94".

This is all in our country. What is the situation abroad?
Today in Europe, the most common shanks with the performance of DIN - german standardOn the basis of which the ISO International Standard was created. The Japanese machines are dominated by shanks with the execution of MAS WT (Japanese JIS standard in 6339). Machines with spindles on this standard are becoming more widely distributed in Europe, respectively, the nomenclature of the auxiliary tool with this type of connection is expanding. In America, auxiliary tools are common with CAT / ANSI shanks. Some firms make machines with accession to the spindle of their own design (for example, Mazak). What are the fundamental differences of the specified shanks? The article presents the sketches of some standard shanks and tables with basic sizes.

Most European machines use auxiliary tool according to DIN 69871 (ISO 7388 / 1-83). This standard has three versions:

• the form "A" - without the central hole for the supply of coolant (corresponds to the Russian GOST 25827-93. 2);
• the form "AD" - with the central hole for the supply of coolant through the spindle center;
• the form "B" - with coolant side holes, located on the end of the flange under the capture of the manipulator.

The form "AD" is similar to the form "A", only with a cross-cutting central hole.
The execution of "B" constructively varies from various firms, but functions remain unchanged.
Execution 1 according to GOST 25827-93 (for manual tool change) today fully corresponds to DIN 2080.
Many domestic and western production machines are currently oriented on DIN (ISO), there are less frequent machines with a spindle by MAS W. Most firms producing auxiliary tool (including Russian) offer the full range of both standards.
When buying a machine, it is still better to clarify exactly what kind of spindle execution is offered to the customer. Often, manufacturers of machine tools indicate only the sizes of auxiliary tool without specifying, which standard is made by the spindle. If there is a choice of choice, it is better to choose a machine with such an auxiliary instrument that is already in your company. If the company offers without an alternative to the machine with a spindle type previously not used in your production, it is better to contact the firm offering the appropriate auxiliary tool, and learn how wide the wide range of the tool of this standard is available. Otherwise, you will have long to look for the source of acquisition of the necessary auxiliary instrument.
With all the variety of the considered auxiliary tool, there is a partial interchangeability. All tools of one sizes have the same landing base diameter and approximately the same base length. Most often, the complexity occurs only with the automatic tool change, when the mandrel is taken by a manipulator from the machine store. Instruments different standards have a different shape and size of grooves under the capture of the manipulator, as well as the different distance from the basic spindle plane to the groove axis. With manual shift, such a problem does not occur. Since each standard has its own thrust form for the mandrel clip in the machine spindle, it is necessary to check whether it is possible to use this standard on this machine, or it is necessary to make a special transition traction. It is with the help of transient traction auxiliary tool made by DIN 69871, can be fixed on a spindle machine according to GOST 25897-93. Execution 3. It is also recommended to check the base length of the cone, since it is different standards Also a little different.

Interstate standard

Tool shanks with cone 7:24

Official edition

Interstate Council for Standardization. Metrology and certification Minsk

Preface

1 Developed by the State Standard of Russia

Submitted by the Technical Secretariat of the Interstate Council on Standardization, Metrology and Certification

2 adopted by the Interstate Council for Standardization,

3. The standard corresponds to the international standard ISO 297-88 in terms of the shanks of the tool shanks with a cone 7:24 and fully corresponds to ISO 7388-1-83

Execution 1.

Limit deflection of the position of the main plane.

/ - Basic plane; 2 - Tool Fastening Area

Dimensions for certificates

Dimensions correspond to ISO 297-88. In addition to sizes.

Notes:

1. Dimensions enclosed in brackets for machines designed until 01/01/94.

2. Dimensions A, D 2, / apply to the tools for which the clamp from the front side of the flange is provided.

3. Gunge for exit grinding Circle - According to GOST 8820. It is allowed to manufacture shanks without a groove to exit the grinding circle between the base diameter and the flange. In this case, the diameter of the cylindrical transitional surface d ^ \u003d d ~ o, 5.

4. In coordination with the consumer, an increase in size D T is allowed to values \u200b\u200bequal to the diameter of the outer surface of the spindle of GOST 30064-93.

* Limit deflection of the position of the main plane.

** Sizes Determine the space to capture the tool.

Shanks sizes corresponding to ISO 7388-1-83 (see application).

Notes:

1. The magnitude of the diameter of the cylindrical part /) 5 must satisfy the following relationship:

Between the base diameter and the flange to manufacture the groove to exit the grinding circle of depth-according to GOST 8820. Width of the groove for cones 30 and 40-1.6 mm. for cones 45 and 50-3.0 mm;

Increase in size / subject to the fulfillment of the ratio of the grooves for a key of a width B can be unsported with parallel sides with a length of no less values \u200b\u200b/ 44

Notes:

1. Gunge for the output of the grinding circle - according to GOST 8820.

2. In coordination with the consumer is allowed:

Between the base diameter and the flange to make a groove to exit a grinding wheel in a depth of GOST 8820, the width of the groove for the conees 30 and 40 is 1.6 mm, for cones 45 and 50 - 3.0 we;

An increase in size / to a value not exceeding: / + l, while the grooves for the key width can be produced by no less valid / parallel sides /;

Production of a groove with size / a.

3. Sizes and shape of the center hole must match the specified. 4 and in table. four.

4. unspeakable limit deviations of dimensions: H14, s4, IT 14

5. The degree of accuracy of AT4 cones, AT5, the tolerance of the angle and the forms of the cone - according to GOST 19860. Deviation of the corner of the cone from the nominal plane to the "plus".

6. Surface hardness of the conical part of shanks - 51 ... 57 HRC,.

GOST 25827-93
(ISO 7388-1-83)

Group G27.

Interstate standard

Tool shanks with cone 7:24

Dimensions

Tool Shanks WITH 7/24 TAPER. Dimensions

OKP 39 2800.

Date of introduction 1995-01-01

Preface

1 Developed by the State Standard of Russia

Submitted by the Technical Secretariat of the Interstate Council on Standardization, Metrology and Certification

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

For the adoption voted:

3. The standard corresponds to the international standard ISO 297-88 in terms of the shanks of the tool shanks with a cone 7:24 and fully corresponds to ISO 7388-1-83

4 introduced instead of GOST 25827-83 and GOST 24644-81 In part of mandrels with a cone 7:24

Information details

Reference regulatory and technical documents

This standard applies to the tool shanks with a cone 7:24 for manual and automatic tool change.

The requirements of this standard are mandatory, besides outlined in the notes 3 and 4 to Table 1 and in the notes to Table 2-4.

1. Tool shanks should be made of executions:

1 - for manual change of tools with cones from 30 to 80;

2 and 3 - to automatically change tools with cones from 30 to 50.

2. Tool shanks sizes must match:

execution 1 - specified on the features. 1 and in Table 1;

performances 2 - specified on the drawn.2 and in Table 2;

performances 3 - specified on the drawn.3 and in Table 3.

Note. Tool with shanks of execution 3 - for equipment designed to 01.01.94.

Chert.1. Dimensions of tool shanks. Execution 1.

_________________

1 - main plane; 2 - Tool fastening zone

Table 1

_________________
* Dimensions for references.

Dimensions correspond to ISO 297-88, except for the sizes enclosed in brackets (see Appendix)

Notes:

1. Dimensions enclosed in brackets for machines designed until 01/01/94.

2. Dimensions, apply to the tools for which the clamp from the front side of the flange is provided.

3. Gunge for the exit of the grinding circle - by GOST 8820. . It is allowed to manufacture shanks without a groove to exit the grinding circle between the base diameter and the flange. In this case, the diameter of the cylindrical transitional surface \u003d.

4. In coordination with the consumer, an increase in size is allowed to values \u200b\u200bequal to the diameter of the outer surface of the spindle GOST 30064-93.

Damn. Execution 2.

_________________
* Limit deflection of the position of the main plane.



*** Size for references.

1 - main plane; 2
cutting edge tool; 3 - measuring roller; 4 - Tool fastening zone

table 2

_________________
* Shanks sizes corresponding to ISO 7388-1-83 (see Appendix).

Notes:

1. The magnitude of the diameter of the cylindrical part must satisfy the following ratio:

GOST 8820. . Width of the groove for cones 30 and 40 - 1.6 mm, for cones 45 and 50 - 3.0 mm;

- increase in size subject to the fulfillment of the ratio, while the grooves for a key of the width can be no less than no less valid to the parallel sides;

Damn.3. Execution 3.

_________________
* Limit deflection of the position of the main plane.

** Sizes Determine the space to capture the tool.

1 - main plane; 2 - Count counting to determine the position
cutting edge tool; 3 - Measuring roller

Table 3.

Notes:

1. Gunge for the exit of the grinding circle - by GOST 8820..

2. In coordination with the consumer is allowed:

- Between the base diameter and the flange to make a groove to exit the grinding wheel in depth of GOST 8820. , groove width for cones 30 and 40 - 1.6 mm, for cones 45 and 50 - 3.0 mm;

- an increase in size to a value that does not exceed:, while the grooves for a key of the width can be made by no less valid values \u200b\u200bwith parallel sides;

- Production of a groove with size.

3. The dimensions and shape of the center hole must correspond to the specified ones. 4 and in Table 4.

Chert.4. Dimensions and shape of the center hole. Performance 1, 2

________________
* Dimensions for references.

** For manual tool change - in coordination with the consumer.

4. unspeakable limit deviations of dimensions: H14, H14, ±

5. The degree of accuracy of AT4 cones, AT5, the tolerance of the angle and the form of the cone - by GOST 19860 . Deviation of the corner of the cone from the nominal placing into the "plus".

6. Surface hardness of the conical part of shanks - 51 ... 57 HRC.

Table 4.

Notes:

1. The size enclosed in brackets for machines designed to 01.01.94.

2. For machine tools with manual change tool for size, it is allowed to apply the H9 tool field, limit deviation The size is not regulated.

3. Gunge for the exit of the grinding wheel (pos.1) - in coordination with the consumer.


Example legend Performance shank 2 with cone 30:

Shank 2-30 GOST 25827-93

Appendix (Reference). Compliance of this standard by international standards ISO 297-88, ISO 7388 / 1-83

ATTACHMENT
Reference

Compliance of this standard by international standards
ISO 297-88, ISO 7388 / 1-83

The shanks of the tool shanks with a cone 7:24 For manual change of tools installed in this standard, fully covers the range of their size according to the international standard ISO 297-88 and are shown in Table 1; To automatically change tools, ISO 7388-1-83 is fully consistent and are shown on the check. 2 and Table 2.

In addition, the standard includes requirements for shank shanks with cone 7:24 for automatic tool change (execution 3) not provided international standards, requirements for the degrees of the accuracy of shanks, the tolerance of the corner of the cone and tolerances of the shape, the surface hardness of the conical part of the shank.



The text of the document is drilled by:
official edition
M.: Standards Publishing House, 1994