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Chuck wobbles or
is loose on spindle
shaft.
1. Foreign material is stuck between
chuck-to-spindle mating surface.
2. Damaged chuck.
1. Remove chuck and clean and de-burr tapered
chuck and spindle mating surfaces, then reas-
semble.
2. Replace.
Spindle does not
retract completely
in uppermost posi-
tion or it binds.
1. Quill shaft is gummy with sawdust and
oil.
2. Feed shaft return spring is weak.
3. Quill deflection screw is binding quill.
1. Clean gummy substance with penetrating oil and
lubricate with a light coat of oil.
2. Increase feed shaft return spring tension as
described on GX^\)..
3. Loosen jam nut, and slightly turn out screw where
quill binds. Retighten jam nut and recheck for
binding and looseness at all spindle locations.
Quill has excessive
deflection.
1. Quill shaft is at fault.
2. Quill and/or bearings are worn.
1. Adjust quill screw.
2. Replace quill and/or bearings.
Holes drilled at an
angle.
1. Table is not at 90 degrees. 1. Adjust table angle (see GX^\)*).
Drill bit wobbles,
holes are oversized.
1. Drill bit incorrectly installed. 1. Remove drill bit and reinstall.