Grizzly G0740 owner manual Scroll Chuck Clamping, Chuck Jaw Reversal, To reverse 2-piece jaws

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 will hold 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. the chuck will spin out of balance and may throw the workpiece! instead, use an independent jaw chuck or a faceplate.

Safer Inside	Insufficient
Jaw Use	Jaw Clamping		Unstable
			Workpiece
	Bar Stock
CORRECT		INCORRECT
Safer Outside	Unsafe Jaw Position and
	Poor Scroll Gear Engagement
Jaw Use			Poor Grip
	Shallow		Unstable
	Bar Stock
			Workpiece
CORRECT		INCORRECT
Safer Outside	Unsafe Inside
Jaw Use		Jaw Use
		Poor Scroll
	Shallow	Gear
	Bar Stock	Engagement
	Unsafe Jaw
CORRECT	Position	INCORRECT
Safer Inside	Unsafe Jaw Position
Jaw Use
	Cylinder
CORRECT	Poor Scroll	INCORRECT
	Gear Engagement

Figure 36. Jaw selection and workpiece holding.

Model G0740 (Mfg. Since 11/12)

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 the cap screws that secure the top jaw to the master (bottom) jaw.

3.remove the top jaw, rotate it 180°, then re- install it with the longest cap screw in the tall- est portion of the jaw.

4.repeat Steps 2–3with each remaining jaw (we recommend only reversing one jaw at a time to keep all original parts together).

Short Cap Screw	Long Cap Screw
	Rotate Top
	Jaw 180º

Figure 37. Reversing the chuck jaws.

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