This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of octagonal hammers. This standard applies to octagonal hammers. QB/T 1290.1-1991 Steel Hammer Octagonal Hammer QB/T1290.1-1991 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
Steel Hammer Octagonal Hammer
Subject Content and Scope of Application
QB/T1290.11991bzxz.net
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of octagonal hammers. This standard applies to octagonal hammers.
2 Reference Standards
GB/T5305 Packaging, marking, transportation and storage of hand tools GB/T13473 General Technical Conditions for Steel Chain Hammers
3 Product Classification
3.1 Type
The type of octagonal hammer is shown in the figure below.
Octagonal Hammer Type Diagram
3.2 Basic Dimensions
The basic dimensions of octagonal hammers are as specified in the table below. 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
QB/T 1290.1- 1991
Basic dimensions
Note: ① Octagonal hammers of special types and specifications are not subject to the restrictions of this table. ② The dimensions of the hammer hole shall comply with the provisions of Appendix A of GB/T 13473. 3.3 Product marking
Basic dimensions
The marking of the octagonal hammer consists of the product name, specification and standard number. Marking example: Octagonal hammer 1.4QB/T1290.14 Technical requirements
4.1 Hardness
Basic dimensions
The hardness of the hammer surface at both ends of the octagonal hammer body is HRC45~～55, and the depth of the hardened layer is not less than 3mm. 4.2 Other requirements
Other technical requirements of octagonal hammers shall comply with the provisions of Chapter 4 of GB/T13473. 5 Test methods
The test methods of octagonal hammers shall comply with the provisions of Chapter 5 of GB/T13473. 6 Inspection rules
The inspection rules of octagonal hammers shall comply with the provisions of Chapter 6 of GB/T13473. 7 Marking, packaging, transportation, storage
The marking, packaging, transportation and storage of octagonal hammers shall comply 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 is 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. From the date of implementation of this standard, the former Ministry of Light Industry Standard SG255--1982 "Octagonal Chain" will be invalidated. 472
Valve number
B---08
B---11
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