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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.
Cam line and spindle mark aligned
figure 37. Camlock is fully loosened when the
cam line is aligned with the spindle mark.
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.
-36-
Scroll chuck
clamping
this 3-jaw scroll-type chuck has an internal scroll-
gear that moves all jaws in unison when adjusted
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
accommodate an odd-shaped workpiece. the
chuck will spin out of balance and may throw the
workpiece! instead, use an independent jaw chuck
or a faceplate.
Safer Inside
Jaw Use
Bar Stock
CORRECT
Unsafe Jaw Position and
Safer Outside
Poor Scroll Gear Engagement
Jaw Use
Shallow
Bar Stock
CORRECT
Safer Outside
Jaw Use
Shallow
Bar Stock
Unsafe Jaw
Position
CORRECT
Safer Inside
Jaw Use
Cylinder
Poor Scroll
CORRECT
Gear Engagement
figure 38. Jaw selection and workpiece holding.
Model G0746/G0749 (Mfg. Since 3/13)
or
positions
Insufficient
Jaw Clamping
Unstable
Workpiece
INCORRECT
Poor Grip
Unstable
Workpiece
INCORRECT
Unsafe Inside
Jaw Use
Poor Scroll
Gear
Engagement
INCORRECT
Unsafe Jaw Position
INCORRECT
to
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