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44
35. Top plate
36. Working corner
37. Side plate
38. Gullet
39. Heel
40. Chassis
41. Rivet hole
42. Toe
43. Depth gauge
44. Correct angle on top plate (degree of angle depends on chain
type)
45. Slightly protruding "hook" or point (curve on non-chisel chain)
46. Top of depth gauge at correct height below top plate
47. Front of depth gauge rounded off .
LOWERING DEPTH GAUGES WITH A FILE
1) If you sharpen your cutters with a fi le holder, check and lower the
depth.
2) Check depth gauges every third sharpening.
3) Place depth gauge tool on cutter. If depth gauge projects, fi le
it level with the top of the tool. Always fi le from the inside of the
chain toward an outside cutter. (Fig. 40)
4) Round off front corner to maintain original shape of depth gauge
after using depth gauge tool. Always follow the recommended
depth gauge setting found in the maintenance or operator
manual for your saw. (Fig. 41)
GENERAL INSTRUCTIONS FOR FILING CUTTERS
File (48) cutter on one side of the chain from the inside out. File on
forward stroke only. (Fig. 42)
5) Keep all cutters the same length. (Fig. 43)
6) File enough to remove any damage to cutting edges (side plate
(49) and top plate (50)) of cutter. (Fig. 44)
12
45
46
47
Fig. 39
Fig. 40
Fig. 41
48
48
49
SHARPENING ANGLES FOR SHARPENING SAW CHAIN
1. Part Number
2. Pitch
3. Depth Gauge Setting
4. Side Plate Filing Angle
5. Top Plate Angle
6. File Guide Angle
48
Fig. 42
Fig. 43
50
Fig. 44
90SG-40
90PX-40
3/8"
0.025"
80°
30°
90°
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