Troubleshooting - Craftsman 351.243951 Owner's Manual

SYMPTOM
Excessive blade
breakage
Premature blade
dulling
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Crooked cuts
2o
4,_
5,
6r,
7.
8
9.
1o
2.,
3o
4,
5
6
7,
2_
3.
4,
5
6
7.
8o
9.,
TROUBLESHOOTING
Material not secure on table
Incorrect speed or feed
Blade too coarse for material
Incorrect blade tension
Teeth in contact with work before saw
is started
Blade rubs on wheel flange
Mis-aligned guides
Blade too thick for wheel diameter
Cracking at weld
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Blade too coarse
Too much speed
Inadequate feed pressure
Hard spots or scale in or on material
Work hardening of material
Blade installed backwards
Insufficient blade tension
Work not square
Rate of feed too great
Guide blocks not adjusted properly
Inadequate blade tension
Upper blade guide too far from
workpiece
Dull blade
Speed incorrect
Blade guide assembly toose
Blade thrust bearing not adjusted
properly
CORRECTIVE ACTION(S)
1o Squarely place work on table
2 Check Machinist Handbook for recommended
speed or feed
3 Check Machinist Handbook for recommended
blade type
4. Adjust blade propedy
5. Place blade in contact with work after saw has
reached full speed
6 Adjust wheel alignment propedy
7 Adjust blade guides propedy
8 Use thinner blade
9, Replace blade
1, Use finer tooth blade
2. Try next lower speed
3_ Gently increase pressure
4 Reduce speed, increase rate of feed (scale)
Change blades (hard spots)
5 Increase rate of feed
6. Remove blade, twist inside out and
reinstall blade
7_ Increase tension to proper level
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1 Use rip fence; adjust tilt of table at 90° to blade
2. Reduce rate of feed
3. Move both guide blocks within 0.002" to
blade (use gauge)
4 Increase blade tension properly
5 Adjust upper guide to clear workpiece
by 1/4"
6, Replace blade
7, Check Machinist Handbook for
recommended speeds
8 Tighten blade guide assembly
9. Move blade thrust bearing within 0°002"
behind blade back
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1. Reduce speed or feed
2_ Replace with finer blade
1 Decrease feed pressure
1_ Reptace
2, Adjust as pet"Lower Blade Guides," page 7
3 Tighten properly
1, Blade guide blocks or bearings worn
2_ Blade guide blocks or bearings not
adjusted properly
3, Blade guide blocks or bearing bracket
loose
1, Teeth too coarse for work
2. Feed too heavy
3. Vibrating workpiece
4. Teeth filling with material
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1. Blade tension too great
2, Drive bett tension too great
3 Blade too coarse for work
(typical when cutting pipe)
4, Blade too fine for work (typical when
cutting either thick or soft material)
5 Excessive dirt and sawdust
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Rough cuts 1 Too much speed or feed
2, Blade too coarse
Blade is twisting 1. Cut is binding blade
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Unusual wear on
side/back of blade
Teeth ripping from 1. Use blade with finer teeth
blade 2, Decrease feed rate
3 Hold workpiece firmly
4. Use blade with coarser teeth
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Motor running
too hot
1 Reduce tension on blade
2. Reduce tension on drive belt
3 Use blade with finer teeth
4 Use blade with coarser teeth
5 Clean thoroughly; vacuum motor and belt area
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