SAW CHAIN TROUBLESHOOTING GUIDE
TECHNICAL INFORMATIONS
CUTTER IDENTIFICATION 1 Top Plate 2 Hook, Cutting Corner 3 Side Plate 4 Gullet 5 Depth Gauge 6 Heel 7 Rivet Hole 8 Toe
FOUR COMMON CAUSES OF CHAIN FAILURE - Incorrect filing - Lack of lubrication - Loose chain tension - Contact with dirt
SHARPENED CUTTERS HAVE: 1 Correct angle on top plate
(degree of angle depends on chain type) Razor-edge on top plate (no light should reflect from this edge) 2 Slightly protruding “hook” or point (curve on non-chisel chain) 3 Razor-edge (with no nicks) on side plate 5 T op of depth gauge at correct height below top plate Front of depth gauge rounded off
FILING ERRORS
TOO-THIN TOP PLATE CAUSES RAPID DULLING. CUTS FAST FOR A SHORT TIME, THEN DULLS. POOR STAY SHARP.
BACKSLOPE ON SIDE PLATE CUTTING EDGE – CUTTER WON’T FEED INTO WOOD OR CUTTING TOO SLOW
Cause : File held too high or too large. Too large grinding wheel or not grinding deep enough. Solution : Refile cutters to recommended angle using the correct file and filing guide or the right size, properly dressed grinding wheel.
Cause : File handle held too low Solution : Refile properly, at recommended angle
TO MUCH HOOK IN SIDE PLATE CUTTING EDGE – CUTTERS GRAB, CUT ROUGH. CUTTERS DULLS QUICKLY OR WON’T HOLD CUTTING EDGE. TOP PLATE BREAKAGE AND/OR SAW CHAIN STRETCH.
TOP PLATE FILING ANGLE LESS THAN RECOMMENDED – SLOW CUTTING, EXCESS WEAR ON CHAIN AND BAR. REQUIRES EXTRA EFFORT TO CUT. POSSIBLE BINDING IN CUT.
Cause : File held too low or file is too small. Wheel is grinding too deep or is too small. Solution : Refile to recommended angle with right size file or wheel, properly dressed.
Cause : File held at less than recommended top plate filing angle Solution : Refile at correct angle
20°
TOP PLATE FILING ANGLE MORE THAN RECOMMENDED – SIDE PLATE CUTTING EDGE IS THIN AND DULLS RAPIDLY
FLAT TOP PLATE CUTTING ANGLE – CHAIN WON’T FEED INTO WOOD, WON’T CUT
Cause : File handle held too high or is too large. Incorrectly sized, dressed and/or positioned Grinding wheel. Solution : Refile properly at recommended angle
Cause : File held at more than recommended angle Solution : Refile at correct angle
60°
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Technical Informations
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