Saw Chain Performance - Shindaiwa 502s Manual Del Operador

Saw Chain Performance

Your saw's performance on the job
depends heavily on the condition of its
saw chain.
How the Saw Chain Works
As the saw chain is pulled through the wood:
1. The depth gauge setting determines
the depth of cut for each cutter.
2. The cutter's leading edge enters the
wood, causing the entire cutter to "rock
back" and lift away from the bar.
Sharpening Technique
IMPORTANT!
File all cutters to the same angle and
depth! Unequal filing may cause the saw
to vibrate or cut erratically!
NOTE:
For consistent filing angles, use a filing
guide.
1. Using the appropriate round file, sharpen
all cutters to a 25° angle as shown.
2. After all cutters are sharpened, use
a depth gauge joiner to measure the
height of each depth gauge.
Slightly protruding hook or point
Correct angle
(curve on non-chisel chain)
on top plate
CHN-08
Cause
Top plate
angle less than File held at less than recom-
recommended mended angle.
Result
Slow cutting. Requires extra
effort to cut.
20° Remedy
File cutters to recommended
angle.
CS_top plate angle less than
Backslope on Cause
File held too high or the file
side plate cut-
ting edge was too large.
Result
Cutters won't feed into wood.
Slow cutting. Must force chain
to cut. Causes excessive bot-
tom wear.
Remedy
CHN-03
File cutters at recommended
angle. Check file size.
3. The top plate peels the severed wood
chip away.
4. The chip is discharged out the rear of
the cutter.
Most of the actual cutting is done by the
sides and corners of the individual cutters!
3. As required, use a flat file to lower
depth gauges to the appropriate .025"
(0.64 mm) height.
4. After all depth gauges have been
adjusted, use a flat file to round each
depth gauge leading edge to original
curvature and angle.
25°
Correct Filing Technique
Top of depth gauge at correct
height below top plate
Front of depth
gauge rounded
Top plate angle
more than
recommended
50°
High depth
gauge
IMPORTANT!
Using a filing
gauge
A
Filing Problems
Cause
File held at more than recom-
mended angle.
Result
Cutting angle is very sharp but
will dull fast. Cutting action
rough and erratic.
Remedy
File cutters to recommended
angle.
CS_top plate angle greater than
originally titled CHN-07
Cause
Depth gauge never filed.
Result
Slow cutting. Must force chain
to cut. Will cause excessive
wear on the cutter heel.
Remedy
CHN-04
Lower gauges to recommend-
ed setting.
CHN-09
2
1
Using a depth
gauge joiner
Using a flat file to
round the front
corner on a depth
gauge
CHN-19
Keep all cutter lengths equal!
0.025" (0.64 mm)
A=B B
Hook in side
plate cutting
edge
CHN-02
Low depth
gauge
CHN-05
3 4
CHN-18
0.025"
CHN-01
Cause
File held too low or the file
was too small.
Result
Rough cutting. Chain grabs.
Cutters dull quickly or won't
hold a cutting edge.
Remedy
Check file size. File cutters to
recommended angle.
Cause
Wrong gauge setting or no
gauge used.
Result
Rough cutting. Chain grabs.
Saw won't pull chain through
wood. Excessive wear on the
cutter heel.
Remedy
If depth gauges are too
low, the chain is no longer
serviceable.
17