Troubleshooting - Holzmann SB 3116RHN User Manual

5. TROUBLESHOOTING

PROBLEM
Noisy Operation
Drill bit burns
Drill bit leads off to a direc-
tion, hole not round
Wood splinters on
underside
Drill bit stalls in material
Excessive drill bit runout or
wobble
Quill returns too slow / too
fast
Chuck does not stay atta-
ched to spindle or it falls off
when trying to install it
PROBABLE CAUSE
1. Incorrect belt tension
2. Dry Spindle
3. Loose Spindle pulley
4. Loose motor pulley
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
2. Cutting lips of bit not
equally long or have
not equal angles
3. bent drill bit
4. Spindle bearings too
loose
1. No back-up material
on underside of
workpiece
1. To high feed rate
2. dull drill bit
3. Inproper belt tension
4. Bit not suitable for
material or material
too hard (e.g. some
stainless steel types)
1. Bent drill bit
2. Worn spindle bearings
3. Drill not properly
installed in chuck
4. Chuck defect
5. arbor or chuck
surface dirty
1. Inproper spring
tension
1. arbor, chuck or quill
surface dirty, greasy
SOLUTION
1. Adjust tension
2. Lubricate spindle
3. Check tightness of
retaining nut on
pulley and tighten if
necessary
4. Tighten setscrews in
pulleys
1. Change speed
2. Retract drill bit
frequently to clear
chips.
3. Resharpen drill bit
4. Faster feed speed
5. Lubricate drill bit
1. try to avoid
2. resharpen or change
3. change bit
4. Fasten Nut pulley
(19) tighter
1. Place a scrap wood as
back-up material
under your workpiece
1. Reduce feed rate
2. sharpen/replace
3. Increase belt tension
4. Choose correct bit
1. Replace
2. Replace
3. Check
4. Check/replace
5. Check/clean
1. Adjust spring tension
1. Check and clean if
necessary