CPC Subgroup
B23B 31/1175 Full Title
Chucks ; Expansion mandrels; Adaptations thereof for remote control (faceplates B23Q1/50; rotary devices holding by magnetic and/or electrical force acting directly on work B23Q3/152) > Chucks > characterised by the retaining or gripping devices or their immediate operating means > Retention by friction only, e.g. using springs, resilient sleeves, tapers
1 direct subcode
Child Classifications
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