JB/T 8026.5-1999 This standard is a revision of JB/T 8026.5-95 "Machine Tool Fixture Parts and Component Ball Head Supports". During the revision, only editorial modifications were made in accordance with relevant regulations, and the technical content has not changed. This standard specifies ball head supports with a ball head diameter of 8 to 32 mm. This standard was first released as GB 2231-80 in 1981, revised for the first time to GB/T 2231-91 on April 30, 1991, and adjusted to JB/T 8026.5-95 in April 1996.
JB/T 8026.5-1999 history
1999JB/T 8026.5-1999 The parts and units of jigs and fixtures.Spherical head supporters