JB/T 8013.1-1999 This standard is a revision of JB/T 8013.1-95 "Machine Tool Fixture Parts and Component Positioning Bushings". During the revision, only editorial modifications were made in accordance with relevant regulations, and the technical content has not changed. This standard specifies positioning bushings with specifications ranging from 3 to 78mm. This standard was first released as GB 2201-80 in 1981, revised for the first time to GB/T 2201-91 on April 30, 1991, and adjusted to JB/T 8013.1-95 in April 1996.
JB/T 8013.1-1999 history
1999JB/T 8013-1999 Machine tool fixture parts and component positioning bushings