Sharpening Your Chain And Adjusting Raker Clearance - Husqvarna 91VG Manuel D'utilisation

Saw chain
• Saw chain pitch (inches)
Spacing between drive
links.
• Drive link width (mm/
inches).
• Number of drive links.
Sharpening your chain and
adjusting raker clearance
!
WARNING!
The risk of kickback is increased with a
badly sharpened chain!
A. 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 cuttings will be very small. If the chain is very blunt
it will not produce any cuttings at all, just wood powder.
• A sharp chain eats its way through the wood and produces
long, thick cuttings.
• The cutting part of the
chain is called the
CUTTING LINK and
this consists of a
CUTTING TOOTH (A)
and the RAKER LIP (B).
The cutting depth is
determined by the
difference in height
between the two.
• When you sharpen a
cutting tooth there are five
important factors to
remember:
FILING ANGLE
CUTTING ANGLE
SAFETY INSTRUCTIONS
A
B
FILE POSITION
ROUND FILE DIA-
METER
FILE DEPTH
It is very difficult to sharpen
a chain correctly without the
right equipment. We recom-
mend you to use a file gauge.
This will help you obtain the
maximum kickback
reduction and cutting
performance from your
chain.
!
The following faults will increase the
risk of kickback considerably.
1
5
• FILE ANGLE TOO
LARGE
• CUTTING ANGLE TOO
SMALL
• FILE DIAMETER TOO
SMALL
English –
5