Saw Chain
Properly Sharpened Cutter
Sharpened Cutters have: J. Correct angle on top plate (degree of angle depends on chain type) K. Razor-edge on top plate (no light should reflect from this edge) L. Slightly protruding “hook” or point (curve on non-chisel chain) M. Razor-edge (with no nicks) on side plate N. Top of depth gauge at correct height below top plate O. Front of depth gauge rounded off
Cutter features 1. Top Plate 2. Square or Round Working Corner 3. Side Plate 4. Heel 5. Rivet Hole 6. Chassis 7. Gullet 8. Toe 9. Depth Gauge
L K J M
O N
1
2
2
3
4
7 6 5
8
9
Filing Errors
Backslope on side plate cutting edge – cutter won’t feed into wood
Too-thin top plate causes rapid dulling
Cause File held too high Solution Refile cutters to recom- mended angle
Cause File handle held too low Solution Refile properly, at recom- mended angle
To much hook in side plate cutting edge – cutters grab, cut rough
Top plate angle less than recommended – slow cutting, excess wear on chain and bar
Cause File held at less than recom- mended angle Solution Refile at correct angle
Cause File held too low or file is too small Solution Refile to recommended angle with right size file
20°
Flat top plate cutting angle – chain won’t feed into wood, won’t cut
Top plate angle more than recommended – side plate cutting edge is thin and dulls rapidly
Cause File handle held too high Solution Refile properly at recom- mended angle
Cause File held at more than recom- mended angle Solution Refile at correct angle
60°
Drive Link Wear
Rounded concave bottom
Scars on sides
Cause Shallow grove on bar tip Solution Regroove bar tip. Bar may need replacing Note Applies to DuraCut ™ bars only
Cause Loose chain jumping off bar Solution Adjust chain tension. Replace bent drive links or replace chain. Refile at correct angle
Saw Chain
FOR 152
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