12
WWW.BBTA.COM.AU
Sharpening your chain and adjusting depth gauge
setting
General information on sharpening cutting teeth
•
Never use a blunt chain. When the chain is blunt you
have to exert more pressure to force the bar through
the wood and the chips will be very small. If the chain
is very blunt it will produce wood powder and no chips
or shavings.
•
A sharp chain eats its way through the wood and
produces long, thick chips or shavings.
•
The cutting part of the chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge
(B). The cutters cutting depth is determined by the
difference in height between the two (depth gauge
setting).
When you sharpen a cutting tooth there are four important
factors to remember.
1. Filing angle
2. Cutting angle
3. File position
4. Round file diameter
It is very difficult to sharpen a chain correctly without the
right equipment. We recommend that you use our file
gauge. This will help you obtain the maximum kickback
reduction and cutting performance from your chain.
See instructions under Specifications for information about
sharpening your chain.
Sharpening cutting teeth
To sharpen cutting teeth, you will need a round file and a file
gauge. See instructions under Specifications for information
on the size of the file and gauge that are recommended for
the chain fitted to your chainsaw.
•
Check that the chain is correctly tensioned. A slack chain
will move sideways, making it more difficult to sharpen
correctly.
•
Always file cutting teeth from the inside face. Reduce
the pressure on the return stroke. File all the teeth on
one side first, then turn the chainsaw and file the teeth
on the other side.
•
File all the teeth to the same length. When the length of
the cutting teeth is reduced to 4 mm (0.16”) the chain is
worn out and should be replaced.
General advice on adjusting depth gauge setting
•
When you sharpen the cutting tooth (A), the depth
gauge setting (C) will decrease. To maintain optimal
cutting performance the depth gauge (B) has to be
filed down to achieve the recommended depth gauge
setting.
See instructions under Specifications to find the correct
depth gauge setting for your particular chain.
Adjustment of depth gauge setting
•
The cutting teeth should be newly sharpened before
adjusting the depth gauge setting. We recommend that
you adjust the depth gauge setting every third time you
sharpen the cutting teeth.
•
You will need a flat file and a depth gauge tool. We
recommend that you use our depth gauge tool to
GENERAL SAFETY PRECAUTIONS
WARNING! Departure from the sharpening
instructions considerably increases the risk
of kickback.
WARNING! The risk of kickback is increased
if the depth gauge setting is too large!
NOTE: This recommendation assumes that the length
of the cutting teeth is not reduced excessively.
BT-CS-40
