This standard specifies the type, basic dimensions, technical requirements and test methods of manual socket wrenches for driving square tenons and square holes. This standard applies to manual socket wrenches for installing and removing hexagonal bolts and nuts. GB/T 3390.2-2004 Manual socket wrenches for driving square tenons and square holes GB/T3390.2-2004 Standard download decompression password: www.bzxz.net

ICS 25.140.30
National Standard of the People's Republic of China
GB/T3390.2--2004
Replaces GB/T3390.2-1989
Hand operated socket wrenches
Driving squares and square holes
Hand operated socket wrenchesDriving sguares(ISO 1174-1:1996 Assembly tools for screws and nuts—Driving squares-Part 1:Driving squares for hand socket This standard is revised on the basis of the original national standard GB/T3390.2-1989 "Square sample and square hole for manual socket wrench transmission". It is one of the product series standards for manual socket wrenches. Other standards released at the same time are as follows: GB/T3390.1--2004 "Manual socket wrench socket"; -GB/T3390.3-2004 "Manual socket wrench transmission accessories"; -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 ISO1174-1:1996 "Screw and nut assembly tools - Drive square and square holes - Part 1: Drive square and square holes for hand-operated socket tools" (English version). Taking into account my country's national conditions, this standard has made some modifications when adopting ISO1174-1:1996. 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 comparison of the chapter and article numbers of the technical differences with ISO1174-1:1996 for reference. bzxz.net
The main differences between this standard and ISO1174-1:1996 are as follows: some expressions applicable to international standards are changed to expressions applicable to Chinese standards; the international standards ISO3 and ISO286-1 cited in the international standard ISO1174-1:1996 are changed to cite Chinese national standards GB/T321 and GB/T1800.3 in this standard, and the relevant technical contents of these standards are consistent with international standards. Compared with the original national standard GB/T3390.2-1989, the main changes of this standard are as follows: the combination performance of transmission square and square hole and the corresponding test methods are added (see 4.2 and 5.3); some contents are adjusted.
Appendix A and Appendix B of this standard are informative appendices. This standard is proposed by China Light Industry Federation. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard is drafted by Shanghai Tool Industry Research Institute, and Shanghai Xingguang Like Tool Co., Ltd., Shanghai Hongjiang Machinery Factory, Jiaxing Xingqiu Tool 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/T 3390.2—1982, GB/T 3390.2--1989.1 Scope
Manual socket wrench transmission square cone and square hole
GB/T3390.2—2004
This standard specifies the type, basic dimensions, technical requirements and test methods of manual socket wrench transmission square sample and square hole. This standard is applicable to manual socket wrench transmission square sample and square hole 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 all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an 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/T321 Priority numbers and priority number systems
GB/T1800.3 Limits and basis of fit
Part 3: Table of standard tolerances and basic deviations (GB/T1800.3—1998, eqvISO286-1:1988)
GB/T3390.5 Manual socket wrenches
Inspection rules, packaging and marking
3 Types and basic dimensions
3.1 Type
The type of the transmission square sample is shown in Figures 1 and 2, and the type of the transmission square hole is shown in Figures 3 and 4. Figure 1 Type A transmission square wrench
GB/T3390.2——2004
1) Should be chamfered or rounded to match the r of the square. 1) It should be chamfered or rounded to match the ri of the square sample. 2
Figure 2B type transmission square
Figure 3C type transmission square hole
Figure 4D type transmission square hole
3.2 Series
GB/T 3390.2—2004
The opposite side dimensions of the transmission square sample and square hole are in accordance with GB/T321. The R10 series is divided into five series: 6.3mm, 10mm, 12.5mm, 20mm and 25mm, and their codes are 6.3, 10, 12.5, 20 and 25 respectively. 3.3 Basic dimensions
The basic dimensions of the transmission square sample and square hole are in accordance with Table 1 and Table 2. Table 1 Transmission square wedge dimensions (type A and type B)
Basic dimensions
Unit: mm
Note 1: The maximum and minimum dimensions of the transmission square sample opposite side dimension S1 are calculated based on the IT11 tolerance value specified in GB/T1800.3. Note 2: It is not recommended to use type B and type C together
The type with brackets should be avoided.
Transmission square hole dimensions (type C and type D)
Type.
Basic dimensions
Unit: mm
Note 1: The maximum and minimum dimensions of the transmission square hole opposite side dimension s2 are calculated based on the IT13 tolerance value specified in GB/T1800.3. Note 2: It is not recommended to use type B and type C together. aThe type with brackets should be avoided.
3.4 ​​Marking example
The marking of the transmission square sample and square hole consists of the name, type, series code and standard number. Example 1. The A-type transmission square sample with a series of 12.5 is marked as: Transmission square A12.5GB/T3390.2
Example 2. The C-type transmission square hole with a series of 12.5 is marked as: Transmission square hole C12.5GB/T3390.2
4 Technical requirements
4.1 Surface roughness
The R value of the surface roughness of the transmission square sample and square hole shall not be greater than 25μm. Combination performance
The transmission square should be able to be reliably combined with the transmission square hole, and the connection and removal should be convenient. The steel balls or steel pins of the transmission square sample shall not fall off. 3
GB/T3390.2—2004
5 Test method
5.1 Dimension inspection
The dimensions of the transmission square and square hole are inspected by special gauges and general measuring tools. 5.2 Surface roughness inspection
The surface roughness of the transmission square sample and square hole is inspected by standard sample. 5.3 Combination performance test
When the transmission square sample is inserted into the transmission square hole, there should be no blocking phenomenon. The transmission square sample and square hole can only be disengaged if the disengagement force specified in Table 3 is applied along the axial direction of the transmission square and square hole. Note: This test should be carried out on products produced by the same manufacturer. Table 3 Combination performance test
Series of transmission square and square hole/mm
Inspection rules
The inspection rules of products shall be in accordance with the provisions of GB/T3390.5. Packaging, marking, transportation and storage
The packaging, marking, transportation and storage of the product shall comply with the provisions of GB/T3390.5. Unloading force/N
Appendix A
(Informative Appendix)
Technical differences between this standard and ISO1174-1:1996 and their causes Table A.1 gives a list of technical differences between this standard and ISO1174-1:1996 and their causes. Table A.1 Technical differences between this standard and ISO1174-1:1996 and their causes Chapter number of this standard
Technical differences
The Chinese standard adopting the international standard is quoted. B(A) type is added to B type.
D(C) type is added to D type.
Appendix B
(Informative Appendix)
GB/T 3390.2—2004
To suit my country's national conditions.
To suit my country's existing product types.
To suit my country's existing product types.
Comparison table of chapter and article numbers of technical differences between this standard and IS0 1174-1:1996 gives a comparison table of chapter and article numbers of technical differences between this standard and ISO1174-1:1996. Table B.1 Comparison of chapter and article numbers of technical differences between this standard and ISO1174-1:1996 Chapter and article numbers of this standard
Corresponding international standard chapter and article numbers
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