This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of manual socket wrench transmission accessories. This standard applies to manual socket wrench transmission accessories for installing and removing hexagonal bolts, bolts and nuts. GB/T 3390.3-2004 Manual socket wrench transmission accessories GB/T3390.3-2004 Standard download decompression password: www.bzxz.net

ICS25.140.30
National Standard of the People's Republic of China
GB/T3390.3—2004
Replaces GB/T3390.3—1989
Hand operated socket wrenches
Transmission accessories
Hand operated socket wrenches-Driving parts(ISO 3315:1996,Assembly tools for screws and nuts-Driving parts forhand-operated square drive socket wrenchesDimensions and This standard is revised on the basis of the original national standard GB/T3390.3-1989 "Manual socket wrench transmission 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 and square hole"; --GB/T3390.4-2004 "Manual socket wrench connection accessories"; GB/T3390.5-2004 "Manual socket wrench inspection rules, packaging and marking". This standard is modified to adopt the international standard ISO3315:1996 "Screw and nut assembly tools - Hand-operated socket wrench transmission accessories - Dimensions and tests" (English version).
Taking into account my country's national conditions, this standard has made some modifications when adopting ISO3315:1996. 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 number comparison of the technical differences with ISO3315:1996 for reference. The main differences between this standard and ISO3315:1996 are as follows: some expressions applicable to international standards are changed to expressions applicable to my country's standards; the torque of transmission accessories is based on ISO3315:1996, and the c level is added according to my country's actual situation. Compared with the original national standard GB/T3390.3-1989, 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 strength levels a and c are retained (see 3.3, Table 2); the durability test of reversible ratchet wrenches is added (see 5.6.2.2); 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 Qiujiang Machinery Factory, Jiaxing Xingqiu Tools Co., Ltd., etc. participated in the drafting. The main drafters of this standard are: Lin Meide, Wang Penggen, Zhang Yufang, Zhu Shiliang, Wu Zuxun. The previous versions of the standards replaced by this standard are: GB/T 3390.3--1982, GB/T 3390.3-1989. 1 Scope
Manual socket wrench
Transmission accessories
GB/T 3390.3-2004
This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of manual socket wrench transmission accessories.
This standard applies to the transmission 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 sample and square hole (GB/T3390.2-2004, ISO1174-1:1996, 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) GB/T4955 Metallic coating Coating thickness measurement Anodic dissolution coulometric method (GB/T4955-1997, idtISO2177:1985)
GB/T6462
1463:1982)
3 Product classification
3.1 Type
Cross-section thickness microscope measurement Method (GB/T6462-1986, eqvISO metal and oxide coatings
Transmission accessories are divided into seven types according to the provisions of 251 to 257 in GB/T4625, and their names and numbers are as follows: a) Rotary handle - 251;
b) Steering handle - 252;
Sliding head handle - 253;
d) Bend handle - 254;
e) Quick crank handle - 255 ;
f) Ratchet wrench - 256;
g) Reversible ratchet wrench - 257
3.2 Series
According to the opposite side dimensions of the transmission side, the transmission accessories are divided into five series: 6.3mm, 10mm, 12.5mm, 20mm and 25mm, with codes 6.3, 10, 12.5, 20 and 25 respectively. 3.3 Grade
According to its strength, the transmission accessories are divided into two grades: a and c. 3.4 Basic dimensions
The basic dimensions of the transmission accessories are specified in Table 1. GB/T 3390.32004
Table 1 Basic dimensions of transmission accessories
Sliding head handle
Quick crank handle
Ratchet wrench
Reversible
Ratchet wrench
Steering handle
Square series
Unit: mm
Basic size
lz min
12 max
l2 max
l2 max
12 max
th max
lz max
3.5 Marking example
The marking of transmission accessories consists of name, number, series code, grade and standard number. Example 1. The 12.5 series slider handle with strength grade a should be marked as: slider handle 25312.5aGB/T3390.3 Example 2. The 20 series reversible ratchet wrench with strength grade c should be marked as: reversible ratchet wrench 25720cGB/T3390.34 Technical requirements
Surface quality
The surface of the transmission accessories should not have cracks, burrs or other defects that affect the use. 4.2 Transmission square wedges and square holes
The transmission square samples and square holes of the transmission accessories shall comply with the provisions of GB/T3390.2. 4.3 Hardness
The transmission square sample hardness of the transmission accessories shall not be less than 39HRC. 4.4 Torque
The transmission accessories shall be able to withstand the test torque specified in Table 2. Table 2 Torque of transmission accessories
Sliding head handle
Quick crank handle
Ratchet wrench
Reversible ratchet wrench
Fangjin series/
GB/T3390.3--2004
Torque/N·m
GB/T3390.3—2004
4.5 Surface treatment
Steering handle
Table 2 (continued)
Fang series/
Torque/N·m
The surface of transmission accessories should 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 part
The ratchet mechanism of the ratchet wrench shall rotate flexibly without any jamming. The rotation angle of the steering handle shall not be less than 180°. 5 Test method
5.1 Surface quality inspection
The surface quality of the transmission accessories shall be inspected visually. 5.2 Dimension inspection
The dimension inspection of the transmission accessories shall be inspected by special gauges and general measuring tools. 5.3 Hardness test
The hardness test of the transmission square of the transmission accessories shall be carried out on the transmission square in accordance with the provisions of GB/T230. 5.4 Torque test
5.4. 1 Test steps
The test square hole used in the torque test of the transmission accessories shall have the maximum size of S2 as specified in GB/T3390.2, and the tolerance is H8. The hardness of the test square hole shall not be less than 55HRC. During the test, the transmission square sample shall be inserted into the test square hole, and then the load shall be applied steadily and slowly until the test torque value specified in Table 2 is reached.
The torque test machine with rotating square hole shall be used, and its torque accuracy shall be ±2.5%. 5.4.2 Test requirements for each transmission accessory
5.4.2.1 Test of the slider handle
Move the slider to one end of the handle and apply the load at the other end farthest from the slider. 5.4.2.2 Test of quick crank handle
The test load shall be applied to the center of the crank handle grip. 5.4.2.3 Test of ratchet wrench and reversible ratchet wrench The test load shall be applied to the end of the handle as far as possible. The test of reversible ratchet wrench shall be carried out in both positive and negative directions. 5.4.2.4 Test of rotating handle
Fix the rotating handle and apply torque by rotating the test square hole. 4
5.4.2.5 Test of steering handle
Turn the handle to a position at right angles to the steering head and apply a load to its end. 5.4.2.6 Test of bent handle
The test load shall be applied to the end of the handle as far as possible. 5.5 Test of electroplating layer thickness
GB/T3390.3--2004
For transmission accessories that have been electroplated, 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 according to the provisions of GB/T6462.
5.6 Rotation part test
5.6.1 Rotation test of steering handle
The rotation performance of the steering handle steering head shall be tested by hand force. 5.6.2 Rotation test of ratchet wrench and reversible ratchet wrench5.6.2.1 Rotate the transmission square by hand to check the flexibility of the ratchet mechanism. The reversible ratchet wrench shall be tested in both directions. 5.6.2.2
After the torque test, the reversible ratchet wrench shall be subjected to a durability test according to the provisions of Table 3. Table 3 Durability test
Transmission square sample series/
6 Inspection rules
Total number of test revolutions
The inspection rules of the product shall be in accordance with the provisions of GB/T3390.5. 7 Packaging, marking, transportation and storage
Test torque per revolution/
The packaging, marking, transportation and storage of the product shall comply with the provisions of GB/T3390.5. Frequency (max)/Www.bzxZ.net
(r/min)
GB/T 3390.3—2004
Appendix A
(Informative Appendix)
Technical differences between this standard and ISO3315:1996 and their causes Table A.1 gives a list of technical differences between this standard and ISO3315:1996 and their causes. Table A.1 Technical differences between this standard and IS03315:1996 and their causes Article number of this standard
4.4 (Table 2)
Technical differences
Chinese standards that adopt international standards are quoted. Added references to GB/T230, GB/T3390.5, GB/T4393, GB/T4625.GB/T4955.GB/T6462. Added test torque C series.
Appendix B
(Informative Appendix)
Comparison of chapter and article numbers of technical differences between this standard and IS03315:1996
To suit my country's national conditions.
To suit my country's product status.
Table B.1 gives a comparison of chapter and article numbers of technical differences between this standard and ISO3315:1996. Table B.1 Comparison of chapter and article numbers of technical differences between this standard and ISO3315:1996 Chapter and article numbers of this standard
4.4 (Table 2)
Corresponding chapter and article numbers of international standards
3 (Table 1)
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