Black Max BM5020 Manual Del Operador página 30

TOP PLATE FILING ANGLE
See Figure 51.
 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
See Figure 52.
 CORRECT 80° – 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 pres-
sure; causes excessive wear to the bar and chain.
TOP PLATE FILING ANGLE
CORRECT
LESS THAN 30°
INCORRECT
SIDE PLATE FILING ANGLE
CORRECT
HOOK
INCORRECT
MAINTENANCE
30°
MORE THAN 30°
Fig. 51
80°
BACKWARD SLOPE
Fig. 52
Page 30 — English
Results from using a file with a diameter too large
or file held too high.
MAINTAINING DEPTH GAUGE CLEARANCE
See Figure 53 - 55.
 Maintain the depth gauge at a clearance of .025
in. Use a depth gauge tool for checking the depth
gauge clearances.
 Every time the chain is filed, check the depth
gauge clearance.
 Use a flat file and a depth gauge jointer to lower
all gauges uniformly. Use a .025 in. 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.
 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.
RAKER (DEPTH GAUGE) CLEARANCE
DEPTH GAUGE JOINTER
.025 in.
Fig. 53
FLAT FILE
Fig. 54
RESTORE ORIGINAL
SHAPE BY ROUNDING
THE FRONT
Fig. 55