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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Tool shanks with 7/24 taper for automatic tool changers—Part 2Dimensions and designation of shanks of forms JJD and JF
Standard published on 31.12.2013
Selected format:Tool shanks with 7/24 taper for automatic tool changersPart 3:Retention knobs for shanks of forms AC, AD, AF, UC, UD, UF,JD and JF
Standard published on 31.12.2013
Selected format:
Tool shanks with 7/24 taper for automatic tool changers—Part 3:Retention knobs of forms AD, AF, UD, UF,JD and JF
Execute Date: may 2026
Standard published on 31.10.2025
Selected format:Tool shanks with 7/24 taper for automatic tool changers—Part 4: Technical specifications for shanks
Standard published on 31.12.2013
Selected format:Tool shanks with 7/24 taper for automatic tool changersPart 5: Technical specifications of Retention knobs
Standard published on 31.12.2013
Selected format:Taper shank twist drills with carbide tips
Standard published on 30.12.2006
Selected format:T-slot cutters with carbide tips
Standard published on 30.12.2006
Selected format:Square and rectangular keyways
Standard published on 5.6.2003
Selected format:Hobs for parallel side splines
Standard published on 18.5.2005
Selected format:Cutting-off tools for turning with clamp tips
Standard published on 30.12.2006
Selected format:Latest update: 2025-12-24 (Number of items: 2 253 093)
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