Craftsman OR20451 Operation Manual - Page 21

Consultyour local Sears Service Center if - belt replacement

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TROUBLESHOOTING GUIDE To avoid injuryfrom an accidental start, turn the switch"OFF" and always remove the plug from the power source before makingany adjustment. • Consultyour local Sears Service Center iffor any reason the motor will not run. PROBLEM Noisyoperation Drill bit burn. Run out of drill bit point drilled hole not round. Wood splinters on underside. POSSIBLE CAUSES 1. Incorrectbelt tension. 2. Dry spindle. 3. Loose spindlepulley. 4. Loose motor pulley. 1. Incorrect speed. 2. Chips not coming out of hole. 3. Dull drill bit. 4. Feeding too slowly. 5. Not lubricated. 1. Hand grain in wood or lengths of cutting flutes and/or angles not equal. 2. Bent drill bit. 1. No backup material under workpiece. Workpiece torn loose from 1. Not supported or clamped hand. properly. REMEDY 1. Adjust tension. See Section "ASSEMBLY - TENSIONING BELT" 2. Lubricate spindle. See Section "LUBRICATION". 3. Check tightness of retaining nut on pulley, and tighten if necessary. 4. Tighten set screw in motor pulley. 1. Change speed. See Section" BASIC DRILL PRESS OPERATION - SPINDLE SPEEDS" 2. Restract drill frequently to clear chips. 3. Resharpen drill bit. 4. Feed fast enough - allow drill to cut. 5. Lubricate drill. See Section "BASIC DRILL PRESS OPERATION-FEEDING" 1. Resharpen drill bit correctly. 2. Replace drill bit. 1. Use backup material. See Section "BASIC DRILL PRESS OPERATION". 1. Support workpiece or clamp it. See Section "BASIC DRILL PRESS OPERATION". Drill bit binds in workpiece. 1. Workpiece pinching drill bit, or excessive feed presure. 2. Improper belt tension. Excessive drill bit runout or wobble. 1. Bent drill bit. 2. Worn bearings. 3. Drill bit not propedy installed in chuck. 4. Chuck not properly installed. Quill returns too slow or too fast. 1. Spring has improper tension. Chuck will not stay attached to spindle. It falls off when trying to install. 1. Dirt, grease, or oil on the tapered inside surface of chuck or on the spindle's tapered surface. 1. Support workpiece or clamp it. See Section "BASIC DRILL PRESS OPERATION". 2. Adjust tension. See Section" ASSEMBLY TENSIONING BELT". 1. Use a straight drill bit. 2. Replace bearings. 3. Install drill properly. See Section "BASIC DRILL PRESS OPERATION" and "ASSEMBLY". 4. Install chuck properly. See Section "ASSEMBLY - iNSTALLING THE CHUCK". 1. Adjust spring tension. See Section "ASSEMBLY - ADJUSTMENTS -QUILL RETURN SPRING". 1. Using a household detergent, clean the tapered surface of the chuck and spindle to remove all dirt, grease and oil. See Section "ASSEMBLY - INSTALLING THE CHUCK". 21

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TROUBLESHOOTING
GUIDE
To
avoid
injury
from
an accidental start, turn the switch
"OFF"
and always remove the plug
from
the power source before
makinganyadjustment.
•
Consultyour local Sears Service Center if
for
any reason the motor will not run.
PROBLEM
Noisyoperation
Drill bit burn.
Run out
of drill bit point -
drilled
hole
not round.
Wood
splinters on
underside.
Workpiece torn loose from
hand.
Drill bit binds
inworkpiece.
Excessive drill bit runout
orwobble.
Quill returns too slow or
too fast.
Chuck
will
not
stay
attached
to spindle.
It
falls
off when
trying to install.
POSSIBLE CAUSES
1. Incorrectbelt tension.
2.
Dry
spindle.
3.
Loose
spindlepulley.
4.
Loose
motor pulley.
1. Incorrect speed.
2. Chips
not coming out of
hole.
3. Dull drill bit.
4. Feeding too slowly.
5. Not lubricated.
1.
Hand grain in wood or
lengths of cutting
flutes
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 presure.
2. Improper
belt tension.
1. Bent drill bit.
2. Worn
bearings.
3. Drill bit not propedy
installed
in chuck.
4. Chuck
not properly
installed.
1. Spring
has improper
tension.
1.
Dirt, grease,
or oil
on
the
tapered
inside
surface
of
chuck
or on the spindle's
tapered
surface.
REMEDY
1.
Adjust tension.
See Section
"ASSEMBLY
- TENSIONING BELT"
2. Lubricate
spindle.
See
Section
"LUBRICATION".
3. Check tightness of retaining nut on pulley, and
tighten if necessary.
4. Tighten set screw in motor
pulley.
1. Change speed. See Section"
BASIC DRILL
PRESS OPERATION - SPINDLE SPEEDS"
2. Restract drill frequently to clear chips.
3. Resharpen drill bit.
4. Feed fast enough - allow drill to cut.
5. Lubricate drill. See Section "BASIC DRILL
PRESS OPERATION-FEEDING"
1. Resharpen drill bit correctly.
2. Replace drill bit.
1. Use backup material. See Section "BASIC
DRILL PRESS OPERATION".
1. Support workpiece or clamp it. See Section
"BASIC DRILL PRESS OPERATION".
1. Support workpiece or clamp it. See Section
"BASIC
DRILL
PRESS OPERATION".
2. Adjust tension. See Section" ASSEMBLY -
TENSIONING BELT".
1. Use a straight
drill bit.
2. Replace
bearings.
3. Install
drill properly.
See Section
"BASIC
DRILL
PRESS
OPERATION"
and
"ASSEMBLY".
4. Install
chuck
properly.
See Section
"ASSEMBLY
-
iNSTALLING
THE CHUCK".
1. Adjust spring tension. See Section
"ASSEMBLY
- ADJUSTMENTS -QUILL
RETURN SPRING".
1.
Using a household
detergent,
clean
the
tapered
surface
of the
chuck and
spindle
to
remove
all dirt, grease
and oil. See Section
"ASSEMBLY
- INSTALLING
THE
CHUCK".
21