Powermatic PM1800B Operating Instructions And Parts Manual page 32

Symptom
Blade forms cracks at
base of teeth.
Cracks on back edge
of blade.
Blade breaks
prematurely.
Blade breaks close to
weld.
Premature dulling of
saw teeth.
Possible Cause
Teeth not suitable for particular job, or
are incorrectly set.
Blade thickness not suitable for band
wheel diameter.
Blade sharpened incorrectly, becomes
overheated.
Band wheels have become misaligned.
Workpiece being fed too quickly.
Welding on blade not perfectly aligned.
Thrust bearing is worn; caused by
constant contact with back of blade.
Feed force too great.
Blade pitch too coarse.
Support bearing not properly supporting
blade.
Blade tensioned too tightly.
Blade overheated during welding.
Blade cooled too rapidly after welding.
Blade "pitch" too fine.
Feed pressure too light.
Cutting rate too low.
Incorrect choice of blade.
Chipped tooth or foreign object lodged in
cut.
Correction
Replace with proper blade for job.
Replace with proper thickness blade.
Sharpen blade properly or replace.
Contact service representative.
Reduce feed speed to lessen strain on
the blade.
Eliminate the welded part, and re-weld
properly; or acquire a new blade. Round
the back edge of a new blade.
Replace thrust bearing. Adjust new
bearing according to instructions (sect.
10.6.2).
Reduce feed force.
Refer to blade selection chart; use finer
pitch blade.
Check support bearing for correct
position and signs of wear. Adjust or
replace as needed.
Reduce tension.
Have blade annealed, or eliminate brittle
part and weld correctly.
Have blade annealed, or eliminate brittle
part and weld correctly.
Refer to blade selection chart. Use blade
with coarser pitch.
Increase feed pressure.
Increase feed pressure and cutting rate.
Re-examine material. Select proper
blade from the chart.
Stop the saw and remove lodged
particle. Replace blade if damaged.
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