This standard specifies the static accuracy test of manual scroll chucks with two or more jaws and the tolerances for the two classes, based on ISO 230-1.
JIS B 6152:1993 history
2008JIS B 6152:2008 Machine tools -- Test conditions for self-centring, manually-operated chucks with one-piece jaws
1993JIS B 6152:1993 Self-centring manually-operated chucks for machine tools -- Acceptance test specifications (geometrical tests)