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Mounting Chuck or
Faceplate
The three-jaw scroll chuck will automatically self-center
the workpiece. It has hardened steel external jaws
that hold the workpiece on the outside diameter of the
part. An extra set of jaws is included for holding larger
workpieces on the inside diameter of the part.
The four-jaw chuck has hardened steel jaws that must be
independently adjusted to center the workpiece. Each jaw
can be removed from the chuck body and reversed for
clamping odd-shaped workpieces.
If either chuck cannot hold your workpiece, the cast-iron
faceplate has slots for T-bolts that hold standard or cus-
tom clamping fixtures. With the correct clamping hard-
ware, this faceplate will hold non-cylindrical parts such as
castings.
Both chucks and the faceplate are removed and installed
the same way.
To remove and install the chuck or faceplate, do these
steps:
1. DISCONNECT POWER TO THE LATHE!
2. Lay a piece of plywood over the bedways to protect
the precision-ground way surfaces.
3. Use a 5mm hex wrench to remove the two cap
screws and the chuck locks (Figure 6).
4. Insert the chuck keys as shown in Figure 7, hold the
spindle, and loosen the chuck.
Note: The chuck loosens in the counterclockwise
direction.
5. Support the chuck from falling off of the spindle;
unscrew and remove the chuck.
6. Clean, inspect, deburr, and lightly oil all threads and
mating surfaces (Figure 8).
7. Install the faceplate or the other chuck in the
reverse order of the previous steps.
Spindle Lock Hole
Chuck Lock
Figure 6. Cap screw, chuck lock and lock
Figure 7. Inserting chuck keys to loosen or
tighten the chuck onto the spindle.
Clean, de-burr, and oil threads
and all mating surfaces shown.
-16-
Model M1099 (Mfg Since 8/07)
Cap Screw
hole.
Figure 8. Spindle.
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