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Using the Four-Jaw Chuck
To install the four-jaw chuck, do these steps:
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To load a workpiece in the four-jaw chuck, do these steps:
1.Using the chuck key, open each jaw so the workpiece will lay flat against the chuck face and will be roughly centered.
2.Support the workpiece in the center of the chuck as best as you can by eye.
3.Turn each jaw until it just makes contact with the workpiece.
4.While measuring with a dial indicator (see Figure 16), and rotating the chuck by hand, make fine centering adjustments by slightly loosening one jaw and tightening the opposing jaw until the workpiece is precisely aligned.
5.Use a lower RPM when machining heavy eccentric workpieces.
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=`^li\16% Centering workpiece.