B23B31/1171 - CPC Classification

Chucks ; Expansion mandrels; Adaptations thereof for remote control; Chucks characterised by the retaining or gripping devices or their immediate operating means; Retention by friction only, e.g. using springs, resilient sleeves, tapers not used, subgroups and

• B23B31/1172 » {using fluid-pressure means to actuate the gripping means} 3