RIDGID SP6490 Operator's Manual page 34

Troubleshooting (continued)
Trouble
Drill bit burns
Drill bit leads off,
hole not round
Wood splinters on
underside
Workpiece torn
loose from hand
Drill bit binds in
workpiece
Excessive drill bit
runout or wobble.
Quill returns too
slow or too fast
Chuck will not stay
attached to spin-
dle, it falls off when
trying to install.
Chuck rotates but
does not deliver
sufficient torque to
properly drill.
Probable Cause
1. Incorrect speed
2. Chips not coming out of
hole
3. Dull drill bit
4. Feeding too slow
5. Not lubricated
1. Hard grain in wood or
lengths of cutting lips
and/or angles not
equal.
2. Bent drill bit
1. No "backup material"
under workpiece
1. Not supported or
clamped properly
1. Workpiece pinching
drill bit or excessive
feed pressure.
2. Improper belt tension
1. Bent drill bit
2. Worn spindle bearings
3. Drill bit not properly
installed in chuck
4. Chuck not properly
installed
1. Spring has improper
tension
1. Dirt, grease or oil on
the tapered inside sur-
face of chuck or on the
spindles tapered sur-
face.
1. Spindle pulley nut (part
no. 821742) loose.
1. Change speed. See "Getting to
Know Your Drill Press" section.
2. Retract drill bit frequency to clear
chips
3. Resharpen drill bit
4. Feed fast enough, allow drill bit to
cut
5. Lubricate drill bit. See "Basic Drill
Press Operation" section.
1. Resharpen drill bit correctly
2. Replace drill bit
1. Use "backup material". See "Basic
Drill Press Operation" section.
1. Support or clamp workpiece. See
"Basic Drill Press Operation" sec-
tion.
1. Support or clamp workpiece. See
"Basic Drill Press Operation" sec-
tion.
2. Adjust tension. See "Installing and
Tensioning Belt" section.
1. Use a straight drill bit.
2. Replace bearings
3. Install drill bit properly. See "Basic
Drill Press Operation" section.
4. Install chuck properly, refer to
"Assembly- Installing the Chuck".
1. Adjust spring tension. See "Adjust-
ments - Quill Return Spring" section.
1. Using a household detergent, clean
the tapered surface of the chuck
and spindle to remove all dirt,
grease and oil.
1. Turn nut counterclockwise to
tighten. (The nut has left-hand
threads.) See Repair Parts - Figure 1
for location of pulley nut.
34
Remedy