JB/T 9940.2-1999 This standard is a revision of ZB J52 010.2-89 "Technical conditions for self-locking tapered reducer sleeves for tool shanks". The main technical content differences compared with the original standard are as follows: - Re-edited according to relevant standards; - Type inspection requirements are added to the inspection rules; - Product model marking examples are adjusted according to the provisions of the newly released JB/T 2326-1994. This standard is part of the JB/T 9940 "Self-locking tapered reducer sleeves for tool shanks" series of standards, which includes the following two parts: JB/T 9940.1-1999 Parameters of self-locking tapered reducer sleeves for tool shanks JB/T 9940.2-1999 Technical conditions for self-locking tapered reducer sleeves for tool shanks This standard specifies the technical requirements, inspection rules, product marking and packaging of self-locking tapered reducer sleeves for tool shanks. This standard applies to self-locking tapered reducer sleeves for tool shanks used in machine tools. This standard was first issued in March 1989. JB/T 9940.2-1999 Technical conditions for self-locking tapered reducers for tool handles JB/T9940.2-1999 Standard download decompression password: www.bzxz.net

TCS 25.060.20
Mechanical Industry Standard of the People's Republic of China
JB/T9940.1~9940.2—1999
Self-locking tapered reducer for tool handle
1999-05-20 Issued
State Administration of Machinery Industry
2000-01-01 Implementation
JB/T9940.2—1999
This standard is a revision of ZBJ52010.2—89 (Technical conditions for tool handle self-locking reducer sleeves). This version is formulated based on the structural characteristics of tool handle self-locking reducer sleeves and the user's requirements. The technical content can still meet the current scientific and technological level and meet the production and use needs.
This standard is basically consistent with the technical content of 2H52010.2—89. The main differences are: it has been re-edited according to relevant regulations:
The requirement for the inspection type has been added to the specification: The product model certification example has been adjusted according to the provisions of R23261994. This standard is part of the standard for tool handle self-locking reducer sleeves. J8T9940 is under the general title of "Tool handle self-locking reducer sleeves", including the above two parts:
Part I (i.e. B 9940.1): Reference: Part 2 [i.e. JD/T9940.2]: Technical conditions: This standard replaces ZBJ52010.2-89 from the date of implementation. This standard was proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Machine Tool Accessories Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard: Dalian Machine Tool Accessories Factory. The main drafters of this standard: Zhang Jiaofen, Zhuo Ling, Ma Sanzhu. This standard: First published in March 1989. 1 Scope
Machinery Industry Standards of the People's Republic of China
Tool Shank Self-locking Taper Reducer
Technical Conditions
JR/T 9940.2—1999
15200.289
This standard specifies the technical requirements, inspection specifications, product marking and packaging of self-locking reducer sleeves for T-type self-locking mesh groups. This standard is only applicable to reducer sleeves with handle self-locking round for machine tools. 1 Referenced standards
The following standards contain the provisions that constitute the provisions of this standard through reference in this standard. When this standard is published, the version shown is not valid. All standards are usually slightly revised. All parties using technical standards should discuss the possibility of using the latest version of the following standard. GB/T699—1988
GB/T1443-1996
GB/T 3077--1988
GD/T 1EBS3--19B9
GB/T 17421.1—1998
JB/T2326—1994
JB/T3207—1991
J8755631991wwW.bzxz.Net
JB/14935—1999
3 Technical requirements
Technical conditions for high-quality carbon structural steel
Technical conditions for self-clamping steel for machine tools and T. steel for use with tools
Technical conditions for alloy structural steel
Metric taper gauges
Machine tool inspection and testing Part 1: Geometrical accuracy of machine tools under no-load or machining conditions Machine tool accessories Model manufacturing method
Machine tool accessoriesProduct packagingGeneral technical watermarking codeCutting machine toolCone surface rolling color methodInspection and modification of machine tool accessoriesCompilation of random technical documents
3.1Tool handle reducer sleeve shall be made of 45% carbon steel (see GHT6991.Pliers handle extension rod reducer sleeve,1 tool cone guide extension rod reducer,return reducer sleeve shall be made of 4% alloy structural steel (see B/T3077),or other materials with mechanical properties not exceeding the specified ones.
3.2Heat treatment hardness shall not be less than 40HHC, and the hardness of the opening shall be less than SHRC.3.3Inner and outer surfaces of the steel chain shall be inspected with standard gauge: the contact ratio of actual contact length to working length shall not be less than the heat setting in Table 1, and the torsion roughness value shall not be less than that in Table 1. 1. The maintenance and change of the industry
on the cone base of the long rod diameter change plan
T tool maintenance guide plus light diameter change inspection
circular row diameter change plan
3. The direction of the precision and its inspection see old 2
external demand
"tool maintenance vehicle safety
on the tool cone auxiliary such as long support light room
JB/T9940.2—1999
relative R
contact Biber
.1. The proposed guide lengthening theory||t t||Circular diameter width
In 30 degrees, 1. For
Note: It is allowed to use its penetration effect to carry out geometric test 0.015
Indicator
Test pole
Figure male change
3.5 The basic size and limit deviation of the cone handle part shall be in accordance with the provisions of GB/T1443. The surface sugar content R
Test method
Refer to the relevant provisions of GB8 Hall 17421.1-1998 5.6.1.2 J
Put the indicator head on the L axis and touch the surface of the inspection hole. Rotate the diameter change hole to inspect the cavity. The diameter change hole needs to be re-rotated every three times for a total of four measurements. The arithmetic mean of the effective times is the error of this item. 36 The product surface has small cracks, burns, rust and obvious scratches, etc. that affect the use or appearance. 4 Inspection rules
JB/T 9948.2—1999
4.1 Each product can be shipped out of the factory after passing the inspection. The factory inspection shall include 3.3, 3.4, 3.5, 3.6 and Chapter 5. 4.2 Internal and external surfaces shall be inspected by colorimetric method as required by the regulations, and the inspection method shall comply with the provisions of JB[5563. 4.3 Internal and external surface inspections shall comply with the provisions of GB/T11853. 4.4 Type inspection shall include all the contents of this standard. Type inspection shall be carried out in the following cases: a) When new products or old products are transferred to the factory for production; b) When the product is resumed after a long period of suspension; 3) When the enterprise conducts regular quality inspections or the superior quality supervision department inspects the product. 5 Marking and packaging
S.1 The product shall be marked at appropriate locations: factory name or trademark; b) Product model.
Product models should comply with the standards of JB/T2326. Examples of markings are as follows: tool handle reducer with outer chain of metric size and inner diameter of Morse No. 3, model R515×3; tool extension rod reducer with outer chain of metric size B0 and inner diameter of Morse No. 4, model R5280×4; tool guide extension reducer with outer chain of Morse No. 6 and inner chain of Morse No. 5, model R536x5; tool cone reducer with outer chain of metric size 100 and inner diameter of Morse No. 6, model 54100×65.2 Product packaging should comply with the provisions of 1A/T3207. 5.3 The reduction of the random technical documents of the product should comply with the provisions of JB/T9935, 12
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