-15-
Figure 33. Examples of workpiece
mounted in the 3-jaw chuck.
4. Rotate the chuck by hand to make sure the
workpiece makes even contact with all three jaws
and is centered.
4-Jaw Chuck
The 4-jaw chuck features independently adjustable
hardened steel jaws to hold non-cylindrical or off-
center workpieces. Each jaw can be removed from
the chuck body and reversed for a wide range of work
holding versatility.
To mount a workpiece on the 4-jaw chuck :
1. Disconnect Lathe from POWER !
2. Place a chuck cradle or plywood on the bedway
below the chuck to protect it.
3. Use the chuck key to open each jaw so the
workpiece will lay
fl
at against the chuck face or
jaw steps.
4. With help from another person or a supporting
device, mount the workpiece centered on the
chuck, then turn each jaw until it makes contact
with the workpiece.
5. Tighten each jaw in small increments. After you
have adjusted the
fi
rst jaw, continue tightening in
an opposing sequence.
6. After the workpiece is held in place by the jaws,
turn the chuck by hand and pay attention to the
workpiece alignment.
Tailstock
The tailstock on your lathe can be used to support
workpieces with the use of a live or dead center.
Figure 34. Tailstock and quill lock handles in
locked position.
Quill Handwheel
Tailstock Lock Lever
Tailstock Lock Lever
To move the tailstock :
1. Pull back on the lock lever.
2. Slide the tailstock to the desired position.
3. Push the tailstock lock lever forward to lock the
tailstock to the lathe bed.
To use the tailstock quill :
1. With the tailstock locked to the bed, release the
quill lock lever.
2. Turn the quill feed handwheel clockwise to
feed/move the quill towards the spindle, or turn
counterclockwise to move the quill away from the
spindle.
3. Push the quill lock lever forward to lock the quill
in place.
To install tooling in the tailstock :
1. With the tailstock locked, unlock the quill lock
lever.
2. Turn the quill handwheel CW to extend quill about
25mm out of the casting.
3. Insert a tapered drill arbor or a tapered drill bit
into the quill until the taper is
fi
rmly seated and
the tang is locked to the quill slot.
4. Turn the quill handwheel CW to feed the drill bit
into the rotating workpiece.
5. To remove the tooling from the tailstock, turn the
quill handwheel CCW until the tooling is pushed
out of the taper.
To offset the tailstock :
1. Lock the tailstock in position, and adjust the left
and right jack screws until the scale ( Figure 35 )
indicates the offset you want. See Figure 36 for
adjustment direction.
It can also be used to drill or bore holes in the center
of a part or cut shallow tapers by using the offset
adjustment.
