MAINTENANCE
TOP PLATE FILING ANGLE
■CORRECT 30° - file holders are marked with guide marks to align file properly to produce correct top plate angle.
■LESS THAN 30° – for cross cutting.
■MORE THAN 30° – feathered edge dulls quickly.
SIDE PLATE ANGLE
■CORRECT 80o – Produced automatically if you use the correct diameter file in the file holder.
■HOOK – “Grabs” and dulls quickly, increases the potential of KICKBACK.
Results from using a file with a diameter too small or a file held too low.
■BACKWARD SLOPE – Needs too much feed pressure, causes excessive wear to the bar and chain.
Results from using a file with a diameter too large or file held too high.
MAINTAINING DEPTH GAUGE CLEARANCE
■Maintain the depth gauge at a clearance of .025 in. (0.6 mm). Use a depth gauge tool for checking the depth gauge clearances.
■Every time the chain is filed, check the depth gauge clearance.
TOP PLATE FILING ANGLE
30°
CORRECT
LESS
THAN 30°MORE
THAN 30°
INCORRECT | Fig. 63 |
SIDE PLATE FILING ANGLE
80°
CORRECT
BACKWARD SLOPE
HOOK
INCORRECT
Fig. 64
DEPTH GAUGE
.025 in.
(0.6 mm)
Fig. 65
■Use a flat file and a depth gauge jointer to lower all gauges uniformly. Use a .025 in. (0.6mm) depth gauge jointer. After lowering each depth gauge, restore original shape by rounding the front. Be careful not to damage adjoining drive links with the edge of the file. See Figures 65 and 66.
■Depth gauges must be adjusted with the flat file in the same direction the adjoining cutter was filed with the round file. Use care not to contact cutter face with flat file when adjusting depth gauges.
DEPTH GAUGE JOINTER
FLAT FILE
Fig. 66
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