GB/T 4392-1995 Percussion wrenches and percussion ring wrenches

This standard specifies the types, basic dimensions and technical requirements of percussion wrenches and percussion ring spanners. This standard applies to percussion wrenches and percussion ring spanners. GB/T 4392-1995 Percussion wrenches and percussion ring spanners GB/T4392-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Slugging open-end wrenches and slugging box wrenches
1 Subject content and scope of application
This standard specifies the types, basic dimensions and technical requirements of slugging open-end wrenches and slugging box wrenches. This standard applies to slugging open-end wrenches and slugging box wrenches. Referenced standards
GB/T4393 Technical specifications for open-end wrenches, box wrenches and combination wrenches 3 Types and basic dimensions
3.1 The types of slugging open-end wrenches and slugging box wrenches are shown in Figures 1 and 2. L
Strike wrench
National Technical Supervision Bureau approved GB/T4392-1995 on October 24, 1995
Replaced GB4392--84
Implemented on July 1, 1996
GB/T43921995
Figure 2 Striking box spanner
The basic dimensions and limit deviations of striking box spanners and striking box spanners shall be in accordance with the provisions of Table 1. 3.2
Lower deviation
Upper deviation
Strike open spanner
br(man)
Hi(max)
Li(aia)
Lower deviation
Strike open spanner
b2(mx)
Upper deviation
H2(man)
L2(mio)
Lower deviation
Upper deviation
Strike open spanner
GB/T4392—1995
Continued Table 1www.bzxz.net
Hi(man)
Note: The accuracy of the spanner hole is determined based on the unmachined state. 4 Technical requirements
4.1 Material
Li(catie)
Lower deviation
Strike wrench
be(nan)
Upper deviation
The materials used for striking wrenches and striking wrenches shall comply with the provisions of Chapter 3 of GB/T4393. 4.2 Hardness
The heat treatment hardness of striking wrenches and striking wrenches is HRC30~36. 4.3 The symmetry between the opening and the head width, the deviation shall be in accordance with the provisions of Figure 3 and Table 2.
Specification S
Ht(ma)
130～210
Lz(min)
4.4 Surface treatment
GB/T4392—1995
The surface treatment of the percussion wrench and the percussion box wrench shall comply with the provisions of Article 3.5 of GB/T4393. 4.5 Surface quality
The surface quality of the percussion wrench and the blind box wrench shall comply with the provisions of Article 3.6 of GB/T4393. Additional remarks:
This standard was proposed by the China Light Industry General Association and is under the jurisdiction of the National Tool Hardware Standardization Center. This standard was drafted by the First Working Group of the Tool Hardware Sub-Technical Committee of the National Technical Committee for Standardization of Hardware Products. The main drafters of this standard are Lin Meide, Zhou Yanmou, and Xue Guijuan. This standard was first issued on May 14, 1984. This standard was issued for the second time on October 24, 1995. 266
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