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Model G0746/G0749 (Mfg. Since 3/13)
Chuck Removal
To remove the chuck:
1. DISCONNECT LATHE FROM POWER!
2. Use an appropriate lifting, support, or protec-
tive device to protect the ways and support
the chuck (refer to
Installation & Removal
Devices section for more details).
3. Loosen the camlocks by turning the key
counterclockwise until each cam line is
aligned with its corresponding spindle mark,
as shown below.
Figure 37. Camlock is fully loosened when the
cam line is aligned with the spindle mark.
Cam line and spindle mark aligned
Tip: Camlocks can become very tight. A
cheater pipe may be used as a last resort to
add leverage when loosening. After loosen-
ing, you may need to wiggle the chuck key in
the camlock to fully disengage the stud.
4.
Using a dead blow hammer or other soft
mallet, lightly tap around the outer circumfer-
ence of the chuck body to loosen it from the
spindle.
5.
Remove the chuck from the spindle, using
a light rocking motion to carefully slide the
studs out of the cam holes.
— If the chuck does not immediately come off,
rotate it approximately 60° and tap it again.
Make sure all the marks on the cams and
spindle are proper aligned for removal.
This 3-jaw scroll-type chuck has an internal scroll-
gear
that moves all jaws in unison when a
djusted
with the chuck key
. This chuck holds
cylindrical
parts on-center with the axis of spindle rotation
and can be
rotated
at high speeds if the workpiece
is properly clamped and balanced.
Never mix jaw types or
positions to
accommodate an odd-shaped workpiece.
T
he
chuck will spin out of balance an
d
may throw the
workpiece
!
Instead, use an independent jaw chuck
or a faceplate.
Insufficient
Jaw Clamping
Unstable
Workpiece
Bar Stock
Cylinder
Unsafe Jaw Position
Poor Scroll
Gear Engagement
Safer Inside
Jaw Use
Unsafe Inside
Jaw Use
Unsafe Jaw
Position
Safer Outside
Jaw Use
Poor Scroll Gear Engagement
Unsafe Jaw Position and
Poor Scroll
Gear
Engagement
Poor Grip
Unstable
Workpiece
Shallow
Bar Stock
Shallow
Bar Stock
Safer Outside
Jaw Use
Safer Inside
Jaw Use
CORRECT
CORRECT
CORRECT
CORRECT
INCORRECT
INCORRECT
INCORRECT
INCORRECT
Scroll Chuck
Clamping
Figure 38. Jaw selection and workpiece holding.