This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of claw hammers. This standard applies to claw hammers. The basic dimensions of claw hammers are as specified in the following table. QB/T 1290.2-1991 Steel Hammer Ball Pein Hammer QB/T1290.2-1991 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
1 Subject content and scope of application
Ball Pein Hammer
QB/T 1290.2--1991
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of ball peen hammers. This standard applies to ball peen hammers.
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 ball peen hammer is shown in the figure below.
Ball Pein Type Diagram
Specifications and basic dimensions
The specifications and basic dimensions of ball peen hammers are as specified in the following table. 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/T1290.2--1991
Note: ①D This table does not include ball peen hammers of special specifications and types. Basic dimensions
② The dimensions of the hammer hole shall comply with the provisions of Appendix A of GB/T13473. 3.3 Product marking
The marking of the ball peen hammer consists of the product name, specification and mark number. Marking example: Ball Pein Hammer 0.45QB/T1290.24 Technical Requirements
4.1 Hardness
Basic size
Hammer hole number
A—09
The heat treatment hardness of the hammer end of the ball peen hammer body is HRC45~55, and the heat treatment hardness of the hammer top should not be less than HRC40.4.2 Other requirementsWww.bzxZ.net
Other technical requirements for ball peen hammers shall comply with the provisions of Chapter 4 of GB/T13473. 5 Test methods
The test methods for ball peen hammers shall comply with the provisions of Chapter 5 of GB/T13473. 6 Inspection rules
The inspection rules for ball peen hammers shall comply with the provisions of Chapter 6 of GB/T13473. Marking, packaging, transportation, storage
The marking, packaging, transportation and storage of ball peen hammers shall comply with the provisions of GB/T5305. Additional Notes:
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. From the date of implementation of this standard, the former Ministry of Light Industry standard SG216-1980 "Ball Pein Hammer" will be invalidated. 474
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