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G0554 Gear-Head Floor Lathe
Four-Jaw Direct
Mount Independent
Chuck
Four-jaw chucks feature hardened steel jaws that
are adjusted independently. Each jaw can be
removed from the chuck body and be reversed.
Independent jaw adjustment and reversal allows
fo
r a wide range of work holding versatility.
The four-jaw direct mount independent chuck fea-
t
ured in these instructions moun
ts the same way
as the three-jaw chuck. Refer to the three-jaw
chuck instructions begi
nning on Page 20.
To load a workpiece, do these steps:
1. Using the chuck key, open each jaw so the
workpiece
will lay flat against the chuck
face.
2. Support the workpiece.
3. Lock the tailstock and then turn the tailstock
quill
so the dead center makes contact with
the centerpoint of your workpiece.
4. Turn each jaw until it just makes contact with
the
workpiece.
5.
Tighten each jaw in small increments. After
you have adjusted the first jaw, contin-
ue
tightening in opposing sequence (see
Figures 25 & 26). Check frequently to make
sure
you have not wandered off your center
point due to applying too much pressure to a
single jaw.
PINCH HAZARD! Protect
your hands and precision
ground bedways with
plywood when removing
lathe chuck! The heavy
weight of a falling chuck
can cause serious injury.
Figure 25. Centering workpiece.
Figure 26. Jaw tightening sequence.
6. After the workpiece is held in place,
back the
tailstock away
and rotate the chuck by hand.
The center point will move if the
workpiece is
out of center (see Figure 27).