QB/T 1290.4-1991 Steel hammer flat tail hammer

This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of flat tail hammers. This standard applies to flat tail hammers. QB/T 1290.4-1991 Steel hammer flat tail hammer QB/T1290.4-1991 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
Subject Content and Scope of Application
Flat Tail Hammer
QB/T 1290. 4-- 1991
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fan-tail hammers. This standard applies to flat tail hammers.
Referenced Standards
GB/T5305 Packaging, marking, transportation and storage of hand tools GB/T13473 General Technical Conditions for Steel Hammers
3 Product Classification
The type of flat tail hammer is shown in the figure below.
Flat Tail Hammer Type Diagram
3.2 Basic Dimensions
The basic dimensions of the flat tail hammer are as specified in the following table. 3.3 Product Marking
The marking of the flat tail hammer is composed of the product name, specification and standard number. Marking example: Flat tail hammer 0.10 QB/T1290.4 Approved by the Ministry of Light Industry of the People's Republic of China on October 17, 1991 478
Implemented on June 1, 1992
Basic dimensions
Basic dimensions
QB/T 1290.4-1991
Note: ① This table does not include flat tail hammers of special specifications and types. ② The hammer hole dimensions shall comply with the provisions of Appendix A of GB/T13473. 4 Technical requirements
4.1 Hardness
Basic dimensions
The heat treatment hardness of both ends of the flat tail hammer hammer body is HRC48~55. 4.2
Other requirements
Other technical requirements of the flat tail hammer shall comply with the provisions of Chapter 4 of GB/T13473. 5 Test method
The test method of the flat tail hammer shall be in accordance with the provisions of Chapter 5 of GB/T13473. 6 Inspection and testing
The inspection rules of the flat tail hammer shall be in accordance with the provisions of Chapter 6 of GB/T13473. 7 Marking, packaging, transportation, storagewww.bzxz.net
The marking, packaging, transportation and storage of the flat tail hammer shall be in accordance with the provisions of GB/T5305. Additional notes:
This standard is 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, Chi Renheng, C
Basic dimensions
Hammer hole number
B---01
B—02
B—04
B—05
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