Grizzly G9249 owner manual Using the 3-Jaw Chuck, To mount a workpiece in the 3-jaw chuck

Using the 3-Jaw Chuck

The 3-jaw scroll-type chuck included with this lathe features hardened steel jaws that center the workpiece. When the operator opens or closes the jaws with the chuck key, the jaws move in unison.

There are two sets of jaws included with the 3-jaw chuck—inside and outside jaws. Use the correct jaws for the size and configuration of the workpiece to hold it firmly and securely on the chuck (see Figure 25 for examples).

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Figure 25. Example of using the 3-jaw chuck.

Tools Needed	Qty
Chuck Key	1

To mount a workpiece in the 3-jaw chuck:

1.DISCONNECT LATHE FROM POWER!

2.Use the chuck key to open the jaws until the workpiece sits flat against the chuck face and jaw step, or fits in the chuck hole.

3.Close the jaws until they just make contact with the workpiece.

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4.Turn the chuck by hand to make sure the workpiece makes even contact with all three jaws and is centered, as shown in

Figure 26.

—If the workpiece is not centered, loosen the jaws and adjust the workpiece.

—If the workpiece is centered, fully tighten the jaws.

Figure 26. Example of workpiece firmly held in

the center of the 3-jaw chuck.

Tools Needed	Qty
Chuck Key	1
To remove and install the jaws:

1.DISCONNECT LATHE FROM POWER!

2.Use a piece of wood to protect the bedways.

3.Insert and turn the chuck key counterclock- wise and back the jaws all the way out.

Note: If this is the first time you are removing the jaws, mark each jaw and its jaw guide with a numbers 1–3. Returning the jaws to the same jaw guide on the chuck will make installation easier.

4.Clean the jaw mating surfaces and apply a film of light multi-purpose grease to these surfaces.

Note: Store jaws in a place free from mois- ture and abrasives.

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