Conoidal Chuck
A wire chuck which has a conoidal shape in lieu of the shoulder usually left on wire chucks for the bend in the lathe head. Fig. 72 illus-Fig. 71. trates the usual form of conoidal chucks.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
A wire chuck which has a conoidal shape in lieu of the shoulder usually left on wire chucks for the bend in the lathe head. Fig. 72 illus-Fig. 71. trates the usual form of conoidal chucks.