Grizzly G0554Z owner manual To mount a workpiece onto the 4-jaw chuck

4-Jaw Chuck

Always use a low spindle speed when machining non-concentric workpieces or for off-center turning to avoid ejecting the workpiece from the mounting device at a high rate of speed. Failure to heed this warning could lead to serious personal injury, death or property damage.

The 8" 4-jaw, direct mount, independent chuck included with your lathe has hardened steel jaws that are independently adjusted and can be independently reversed, which allows for a wide range of mounting versatility for non-concentric workpieces.

Mounting Workpiece
Tools Needed	Qty
4-jaw Chuck Key	1
Plywood 3⁄4" (Bedway)	1

To mount a workpiece onto the 4-jaw chuck:

1.DISCONNECT LATHE FROM POWER!

2.Lay a piece of plywood on the bedway under the chuck to protect it.

3.Use the chuck key to open each jaw so the workpiece will lay flat against the chuck face or jaw steps.

4.With assistance or a supporting device, mount the workpiece centered on the chuck, then turn each jaw until it makes contact with the workpiece.

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5.Tighten each jaw in small increments. After you have adjusted the first jaw, continue tight- ening in an opposing sequence, as shown in

Figure 32.

13

Workpiece

Center Point

42

Figure 32. 4-jaw tightening sequence.

6.After the workpiece is held in place by the jaws, turn the chuck by hand and notice the workpiece alignment.

—If the workpiece is not correctly aligned for your operation as you turn the chuck, make fine adjustments by slightly loosening one jaw and tightening the opposing jaw until the workpiece is correctly aligned (see Figure 33 for an example).

Figure 33. Non-concentric workpiece correctly

mounted on the 4-jaw chuck.

Model G0554Z (Mfg 01/09+)