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Using the Four-Jaw Chuck
To install the four-jaw chuck, do these steps:
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on GX^\(0 to mount the four-jaw chuck.
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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