Figure 14. Chucks Used With the Lathe

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A lathe chuck is a device that exerts

pressure on the workpiece to hold it secure to the headstock spindle or

tailstock spindle. Commonly used with the lathe are the independent chuck,

the universal scroll chuck, the combination chuck, the hollow headstock

spindle chuck, the lathe tailstock chuck, the collet chuck, and the step

chuck.

(2) Independent Chuck.

(a) The independent chuck (figure 14) generally has four jaws which are

adjusted individually on the chuck face by means of adjusting screws. The

chuck face is scribed with concentric circles which are used for rough

alignment of the jaws when chucking round workpieces. The final adjustment