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33
PK1500 STACK CUTTER
SHARPENING THE CHAIN
The cutters on the chain of a motor saw are coated
with a very thin layer of chromium. This gives a very
sharp and durable edge. As long as the edge is in
the chromium layer, your chain will have perfect
sharpness.
If you always sharpen the chain before it becomes
dull, the wear and tear on the guide bar and chain
will be minimal.
If, on the other hand, you make 5–10 cuts after
the edge has left the chromium layer, the chain
becomes so dull that it starts to be difficult to saw.
The saw speed will be low and the feed pressure
high. The bar and the chain will rapidly overheat. It
is still possible to cut under these conditions, but the
equipment wears very quickly.
When filing a dull chain, there is a clear risk of not
reaching the chromium layer. The chain may get
sharp, but because the edge is not in the chromium
layer, it will soon become dull again.
If you do not sharpen the chain in time, you will
have to file away a large part of each cutter to
make the chain sharp. This considerably reduces the
service life of the chain. If a lot of cutting is done
with a dull chain, the feed pressure will be high.
Consequently, the bar will wear quickly and there is
a risk of chain breakage.
In conclusion: Sharpen the chain before it becomes
dull. This prevents the setting up of a vicious circle in
which wear is high and cutting results poor.