Grizzly G7945 - Manual (Page 36)

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G7945/G7946 Radial Drill Press
Symptom Possible Cause Possible Solution
Machine has vibration or noisy operation. 1. Motor or component is loose.
2. Belt is slapping belt cover.
3. V-belt is worn or is loose.
4. Motor fan is rubbing on fan cover.
5. Pulley is loose.
6. Machine is incorrectly mounted to the
floor, or the floor is uneven.
7. Chuck or cutter is at fault.
8. Motor bearings are at fault.
9. Spindle bearings at fault.
1. Inspect, replace for stripped or dam-
aged bolts/nuts, and re-tighten with
thread locking fluid.
2. Replace/realign belt and retension
(refer to Page 25).
3. Replace belt.
4. Replace/repair dented fan cover, and
replace loose or damaged fan.
5. Remove pulley, replace with key as
required, and re-install securely.
6. Make sure floor mounting hardware is
tight; place shims under machine.
7. Replace out-of-round chuck, replace
or resharpen cutter, use appropriate
feed rate and cutting RPM.
8. Check bearings, replace motor or
bearings as required.
9. Replace bearing.
Symptom Possible Cause Possible Solution
Drill bit wobbles, holes are oversized. 1. Drill bit installed incorrectly. 2. Remove drill bit and reinstall.
The spindle does not retract completely
in the uppermost position or it binds. 1. The quill shaft is gummy with sawdust
and oil.
2. The feed shaft return spring is weak.
3. The quill deflection screw is binding
the quill.
1. Clean the gummy substance with
penetrating oil and lubricate with a
light coat of oil.
2. Increase the feed shaft return spring
tension as described on Page 35.
3. Loosen the jam nut, and slightly turn
out the screw where the quill binds.
Retighten the jam nut and recheck for
binding and looseness at all spindle
locations.
Holes drilled at an angle. 1. Table is not at 90 degrees. 1. Adjust table angle (see Page 28).
Drill Press Operations