Woodstock M1109 owner manual Replacing Jaws, To remove a set of jaws, do these steps

M1109 Combo Lathe/Mill

Replacing Jaws

OPERATIONS

The three-jaw scroll chuck has removable hardened steel jaws (Figure 17). The outside of the jaws are used to hold the workpiece from the outer diameter.

Numbered from 1–3, the jaws must be used in the match- ing numbered jaw guides, see Figure 18.

Note: The chuck need not be removed from the spindle to swap the jaws.

To remove a set of jaws, do these steps:

1.DISCONNECT POWER TO THE LATHE/MILL!

2. Place a piece of wood over the ways to protect them from potential damage.

3. Turn the chuck key counterclockwise and back the jaws out.

4. Clean the jaw mating surfaces and apply a film of white lithium grease to the mating surfaces.

5. Set the old jaws aside in a safe place free of mois- ture and abrasives.

6.Rotate the chuck key clockwise until you see the tip of the scroll-gear lead thread just begin to enter jaw guide #1 (see Figure 19).

7.Insert jaw #1 into jaw guide #1 and hold the jaw against the scroll gear.

8.Rotate the chuck key clockwise one turn to engage the tip of the scroll-gear lead thread into the jaw. Pull on the jaw now and it should be locked into the jaw guide.

9. Repeat the steps on the remaining jaws.

•If installed correctly, all three jaws will converge together at the center of the chuck.

•If the jaws do not come together, repeat this pro- cedure until they do.

Figure 17. Chuck and jaw selection.

Jaw Guide #1 Jaw Numbers

Figure 18. Jaw guide number.

Lead Thread

Figure 19. Lead thread on scroll gear.

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