This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fitter's hammers. This standard applies to fitter's hammers. QB/T 1290.3-1991 Steel Hammer Fitter's Hammer QB/T1290.3-1991 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
1 Subject content and scope of application
Fixer's hammerwww.bzxz.net
QB/T1290.3—1991
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fitter's hammer. This standard applies to fitter's hammer.
2 Reference standards
GB/T5305 Packaging, marking, transportation and storage of hand tools GB/T13473 General technical conditions for steel hammers
3 Product classification
3.1 Type
The type of fitter's hammer is shown in Figure 1 and Figure 2. 3.2 Basic dimensions
The basic dimensions of fitter's hammer shall be as specified in Table 1 and Table 2. 3.3 Product marking
The marking of fitter's hammer consists of product name, type code, specification and standard number. Marking example: Fitter hammer A0.30 QB/T1290.3 Figure 1
A-type fitter hammer
Approved by the Ministry of Light Industry of the People's Republic of China on October 17, 1991 and implemented on June 1, 1992
Basic dimensions
Basic dimensions
QB/T 1290. 3-1991
Figure 2B-type fitter hammer
Table 1 Dimensions of type A fitter hammer
Basic dimensions
Dimensions of type B fitter hammer
Basic dimensions
Note: ①This table does not include fitter hammers of special specifications and types. Tolerance
②The dimensions of the hammer hole shall comply with the provisions of Appendix A of GB/T13473. 4 Technical requirements
Basic dimensions
Basic dimensions
15×15
19×19
23×23
25×25
29×29
33×33
36×36
42×42
47×47
Basic dimensions
4.1 Hardness
The heat treatment hardness of both ends of the fitter's hammer is HRC 48~58, and the depth of the hard layer is not less than 3mm. 4.2 Other requirements
Other technical requirements for fitter's hammer shall comply with the provisions of Chapter 4 of GB/T13473. 476
Hammer hole number
A—09
Hammer hole number
A—03
Test method
QB/T1290.3-1991
The test method of the fitter's hammer shall be carried out in accordance with the provisions of Chapter 5 of GB/T13473. 6 Inspection rules
The inspection rules of the fitter's hammer shall be carried out in accordance with the provisions of Chapter 6 of GB/T13473. Labeling, packaging, transportation, storage
The labeling, packaging, transportation and storage of the fitter's hammer shall be in accordance with the provisions of GB/T 5305. Additional remarks:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Tool Hardware Standardization Center. This standard was drafted by the Steel Hammer Industry Standard Drafting Working Group. The main drafters of this standard are Lin Meide, Jing Guofan, Liu Yongbao and Chi Renheng. 477
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