Grizzly g0746, g0749 owner manual Chuck Removal, Scroll Chuck Clamping, To remove the chuck

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 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 38. Jaw selection and workpiece holding.

Model G0746/G0749 (Mfg. Since 3/13)