This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of manual socket wrench connection accessories. This standard applies to manual socket wrench connection accessories for installing and removing hexagonal bolts and nuts. GB/T 3390.4-2004 Manual socket wrench connection accessories GB/T3390.4-2004 Standard download decompression password: www.bzxz.net

ICS 25. 140. 30
National Standard of the People's Republic of China
GB/T3390.4-—2004
Replaces GB/T3390.4—1989
Hand operated socket wrenchesAttachments(ISO 3316:1996,Assembly tools for screws and nutsAttachments for hand-operated square drive socket wrenches—Dimension and tests, This standard is revised on the basis of the original national standard GB/T3390.4-1989 "Manual socket wrench connection accessories", and is one of the product series standards for manual socket wrenches. Other standards issued at the same time are as follows: - GB/T3390.1-2004 "Manual socket wrench socket"; GB/T3390.2-2004 "Manual socket wrench transmission square sample and square hole"; - GB/T3390.3-2004 "Manual socket wrench transmission accessories"; - GB/T3390.5-2004 "Manual socket wrench inspection rules, packaging and marking". This standard is modified to adopt the international standard ISO3316:1996 "Screw and nut assembly tools-hand-operated socket wrench accessories and tests" (English version).
Taking into account the national conditions of my country, this standard has made some modifications when adopting ISO33161996. The relevant technical differences have been compiled into the text and marked with a vertical single line in the margins of the clauses they involve. A list of these technical differences and their reasons is given in Appendix A for reference. Appendix B shows the chapter and article numbers of the technical differences with ISO3316:1996 for reference. The main differences between this standard and ISO3316:1996 are as follows: some expressions applicable to international standards are changed to expressions applicable to Chinese standards; the torque of transmission accessories is based on ISO3316:1996, and the C level is added according to the actual situation in my country. Compared with the original national standard GB/T3390.4-1989, the main changes of this standard are as follows: the basic dimensions of transmission accessories are added (see 3.4); the strength level b is cancelled, and the two strength levels a and c are retained (see 3.3, Table 2); - some contents are adjusted.
Appendix A and Appendix B of this standard are informative appendices. This standard is proposed by the China Light Industry Federation. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by the Shanghai Tool Industry Research Institute, and Shanghai Xingguang Li Ke Tools Co., Ltd., Shanghai Jiang Machinery Factory, Jiaxing Xingqiu Tools Co., Ltd. and others participated in the drafting. The main drafters of this standard are Lin Meide, Wang Penggen, Zhang Yufang, Zhu Shiliang, and Wu Zuxun. The previous versions of the standards replaced by this standard are: -GB/T3390.4—1982.GB/T 3390,4—1989. 1
1 Scope
Manual socket wrench
Connection accessories
GB/T3390.4—2004
This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of manual socket wrench connection accessories.
This standard applies to the connection accessories of manual socket wrenches for installing and removing hexagonal bolts and nuts. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T230 Metal Rockwell hardness test method (GB/T230-1991, neqISO6508:1986) GB/T3390.2 Manual socket wrench transmission square and square hole (GB/T3390.2-2004, ISO1174-11996, MOD) GB/T3390.5 Manual socket wrench inspection rules, packaging and marking GB/T4625 Assembly tool terminology for screws and nuts (GB/T4625-1998, idtISO1703:1983) Cover layer Cover layer thickness measurement Anodic dissolution coulometric method (GB/T4955-1997, idtISO2177: GB/T 4955
GB/T 6462
1463.1982)
3 Product classification
3.1 Type
Measuring method of cross-sectional thickness by microscope (GB/T6462-1986, egvISO Metal and oxide coverings
Connecting accessories are divided into four types according to the provisions of No. 203 to 206 in GB/T4625, and their names and numbers are as follows: a) Joint-
b) Connecting rod-
-203;
c) Universal joint
d) Square transmission rod
3.2 Series
205;
-206.
Connection accessories are divided into five series according to the opposite side dimensions of the transmission side: 6.3mm, 10mm, 12.5mm, 20mm and 25mm, with codes 6.3, 10, 12.5, 20 and 25 respectively. 3.3 Grade
Connection accessories are divided into two grades: a and c according to their strength. 3.4 Basic dimensions
The basic dimensions of connection accessories are specified in Table 1. 1
GB/T3390.4--2004
Table 1 Basic dimensions of connecting accessories
Universal joint
Square transmission rod
(for spiral
ratchet drive
Square rod series
Square and square hole
Square sample and square hole
Unit: mm
Basic dimensionswww.bzxz.net
100±5
150±8
125±6
250±12
125±6
250±12
100±6||t t||200±10
400±20
200±10
400±20
3.5 Marking example
The marking of the connection accessories consists of the name, number, series code, length, grade and standard number. Example 1. The 20 series universal joint with strength grade a should be marked as: Universal joint 20520×110aGB/T3390.4 Example 2. The 12.5 series joint with strength grade c should be marked as: Joint 20312.5X44cGB/T3390.4
4 Technical requirements
Surface quality
The surface of the connection accessories should not have Cracks, burrs and other defects. 4.2 Transmission square pants and square holes
The transmission square samples and square holes of the connecting accessories shall comply with the provisions of GB/T3390.2. 4.3 Hardness
The hardness of the transmission square samples and square holes of the connecting accessories shall not be less than 39HRC. 4.4 Torque
The connecting accessories shall be able to withstand the test torque specified in Table 2. Table 2 Test torque of connecting accessories
Universal joint
Square transmission rod
Square sample series/
Square and square hole
Square and square hole
GB/T3390.4—2004
Torque/Nm
GB/T3390. 4—2004
4.5 Surface treatment
The surface of the connection accessories shall be electroplated or otherwise treated. The thickness of the electroplating layer shall not be less than 8um, and the surface shall be uniform in color and shall not have defects such as pores, plating leakage, burning and delamination. 4.6 Rotating parts
When the elbow angle of the universal joint is within 35°, it shall rotate flexibly. The rotation displacement angle of the elbow in all directions shall not be less than 75°
5 Test methods
5.1 Surface quality inspection
The surface quality of the connection accessories shall be inspected visually. 5.2 Dimension inspection
The dimension inspection of the connection accessories shall be carried out by special gauges and general measuring tools. 5.3 Hardness test
The hardness test of the connecting accessories shall be carried out on the outer surface of the transmission square sample and the transmission square hole of the connecting accessories in accordance with the provisions of GB/T230.
5.4 Torque test
5.4.1 Test steps
The square test bar used in the torque test of the connecting accessories shall have the opposite side dimensions of the square sample and the square hole in accordance with the corresponding provisions of S1mx and S2min in GB/T3390.2, with tolerances of h8 and H8 respectively, and the hardness shall not be less than 55HRC. During the test, fix the test square hole, insert the transmission square sample of the connecting accessories into the test square hole, and then insert the square test bar into the transmission square hole of the connecting accessories, and apply the load steadily and slowly until the test torque value specified in Table 2 is reached. The torque test machine with square hole rotation is used, and its torque accuracy is ±2.5%. 5.4.2 Test requirements for various connection accessories
5.4.2.1 Test of joints, connecting rods and universal joints During the test of joints, connecting rods and universal joints, it shall be ensured that the test square hole, test piece and square test rod are on the same axis. 5.4.2.2 Test of square trouser transmission rod
During the test of square transmission, a socket that matches the rod shall be used, and it shall be ensured that the test square hole, test piece and socket are on the same axis. 5.5 Electroplating layer thickness test
For connection accessories treated with electroplating, the thickness of the electroplating layer shall be measured in accordance with the provisions of GB/T4955. For the electroplating layer that cannot be measured by this method, it shall be measured in accordance with the provisions of GB/T6462.
5.6 Rotation test
The rotation of the universal joint is tested by hand force, and the displacement angle of the toggle is measured with a universal angle ruler. 6 Inspection rules
The inspection rules of the product shall be in accordance with the provisions of GB/T3390.5. 7 Packaging, marking, transportation and storage
The packaging, marking, transportation and storage of the product shall comply with the provisions of GB/T3390.5. 4
Appendix A
(Informative Appendix)
Technical differences between this standard and ISO3316:1996 and their causes Table A1 gives a list of technical differences between this standard and ISO3316:1996 and their causes. Table A.1 Technical differences between this standard and ISO3316:1996 and their causes Chapter and article number of this standard
4.4 (Table 2)
Technical differences
Chinese standards that adopt international standards are cited. GB/T230, GB/T3390.5, GB/T4393, GB/T4625.GB/T4955, GB/T6462 are added. Test torque C-level series is added.
Appendix B
(Informative Appendix)
Comparison of the number of chapters and clauses of the technical differences between this standard and IS03316:1996 GB/T 3390.4----2004
To suit my country's national conditions.
To suit my country's product status.
Table B.1 gives a comparison of the number of chapters and clauses of the technical differences between this standard and ISO3316:1996. Table B.1 Comparison of the number of chapters and clauses of the technical differences between this standard and ISO3316:1996 The number of chapters and clauses of this standard
Corresponding number of chapters and clauses of the international standard
3 (Table 1)
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