Historical
ISO 3442:1991
Self-centring chucks for machine tools with two-piece jaws (tongue and groove type) - Sizes for interchangeability and acceptance test specifications
Defines precision classes as follows: class I, corresponding to precision chucks; class II, corresponding to normal accuracy chucks. This second edition cancels and replaces the first edition (1975).
CONTENT PROVIDER
International Organization for Standardization [iso]
International Organization for Standardization [iso]