30
6. Check for worn or improperly-adjusted saw guide
inserts.
7. Check for a worn saw guide back-up bearing.
8. Check for incorrect saw band tension.
9. Check for unbalanced bandwheels.
PREMATURE BLADE TEETH DULLING
1. Band speed and/or feed rate is too high.
2. Check for faulty stock: Heavy scale, inclusions,
hard spots, etc.
3. Stock analysis is incorrect. This can result in an
incorrect cutting recommendation.
4. Coolant is not covering the saw band properly.
5. Check for saw band vibration.
6. Check for chip welding, or a chipped blade tooth
lodged in the cut.
7. Saw band being used is incorrect.
8. Coolant mixture is too weak, or incorrect coolant is
being used.
9. The saw band is not properly tensioned.
10. Decrease feed rate to "break in" a new saw band
on its rst few cuts.
BLADE TEETH STRIPPING
1. Increase band speed or decrease feed rate.
2. Check for chip welding, or for a chipped blade tooth
lodged in the cut.
3. Faulty stock is being used: Check for heavy scale,
inclusions, hard spots, etc.
4. Check for a worn, or improperly adjusted band
brush.
5. Check for vibration caused by loose vise jaw clamp-
ing against the stockpiece.
6. Check for worn saw guide inserts and/or carbide
back-up bearing.
7. Coolant is not being applied correctly.
8. Check for incorrect saw band tension being used.
9. Saw band pitch may be too coarse for thickness of
the stock section.
SAW BAND BREAKAGE
1. The saw band is being dropped into the stockpiece
due to incorrect saw head feed rate.
2. Increase band speed being used and/or decrease
feed rate or feed force.
3. Check for stock not being held rmly by the vise
jaws.
4. Check for incorrect adjustment of the saw guide
inserts and carbide back-up guides.
5. Check for insufcient coolant ow.
6. Use a ner pitch saw band.
7. Check for incorrect saw band tension.
SAW BAND IS NOT RUNNING TRUE AGAINST
THE SAW GUIDE BACK-UP BEARINGS (May
Cause Vibration)
1. Examine the back-up bearings. Replace them if
they are chipped or worn more than 0.020-inch (0.5
mm).
2. Have a DoALL Industrial Supply Center service
representative check machine alignment.
3. Check for worn saw guide pivot bolts.
4. Left saw guide arm is loose, or not positioned close
enough to the stock.
5. Check for a worn anti-squeal roller bearing.
INACCURATE CUT-OFF
1. Check for worn or dull blade teeth.
2. Check for a hard spot in stock being cut.
3. Band brush is not properly cleaning the blade
teeth.
4. Increase band speed being used and/or decrease
feed rate or feed force.
5. Check for dirty coolant. Replace if necessary.
TROUBLE SHOOTING (Continued....)
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