RIDGID SP6490 - Manual (Page 34)

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