JB/T 10121-1999 This standard specifies quick-change chucks for lathes suitable for workpiece diameters of 8 to 100 mm. This standard was first published as JB 3395-83 in 1983 and revised for the first time in 1991 as GB/T 12886-91.
JB/T 10121-1999 history
1999JB/T 10121-1999 The parts and units of jigs and fixtures.Quick powl for lathe