Grizzly G7945 User Manual download pdf (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

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Grizzly G7945 User Manual Page 36

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