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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
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WITHDRAWN published on 1.1.1989
Selected format:Pulley for classical and narrow V-belts drires--Geometrical inspection of groove
WITHDRAWN published on 12.6.1989
Selected format:Belt drives—Pulleys for classical and narrow V-belts drives(system based on datum width)—Geometrical inspection of grooves
WITHDRAWN published on 30.12.1997
Selected format:Belt drives—Pulleys for classical and narrow V-belts drives(system based on effective width)—Geometrical inspection of grooves
WITHDRAWN published on 30.12.1997
Selected format:Quality, Surface roughness and balance of transmission pulleys
WITHDRAWN published on 12.6.1989
Selected format:Quality,roughness and balance of transmission pulleys
WITHDRAWN published on 16.4.2008
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Hand taper 1: 50 pin reamers
WITHDRAWN published on 1.1.1984
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Synchronous belt drives—Pulleys
WITHDRAWN published on 12.6.1989
Selected format:Latest update: 2026-01-23 (Number of items: 2 257 393)
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