Scroll Chuck Clamping; Chuck Jaw Reversal - Grizzly G0750G Owner's Manual

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
Poor Scroll Gear Engagement
Safer Outside
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 33. Jaw selection and workpiece holding.
-32-
or positions to
Insufficient
Jaw Clamping
Unstable
Workpiece
INCORRECT
Poor Grip
Unstable
Workpiece
INCORRECT
Unsafe Inside
Jaw Use
Poor Scroll
Gear
Engagement
INCORRECT
Unsafe Jaw Position
INCORRECT

Chuck Jaw Reversal

This chuck has 2-piece jaws that consist of
a top jaw and a master jaw. The top jaw can
be removed, rotated 180°, and re-installed in
the reverse position for additional work-holding
options. When reversing the top jaws, always
keep them matched with their original master jaw
to ensure the best fit.
To reverse 2-piece jaws:
1. DISCONNECT MACHINE FROM POWER!
2. Remove cap screws that secure top jaw to
master (bottom) jaw.
3. Remove top jaw, rotate it 180°, then re-install
it with longest cap screw in tallest portion of
jaw.
4. Repeat Steps 2–3 with each remaining jaw
(we recommend only reversing one jaw at a
time to keep all original parts together).
Short Cap Screw
Figure 34. Reversing the chuck jaws.
Model G0750G (Mfd. Since 5/15)
Long Cap Screw
Rotate Top
Jaw 180º