Husqvarna 439 Operator's Manual page 28

To sharpen the saw chain
Information about the guide bar and saw
chain
WARNING: Use protective gloves when you
use or do maintenance on the saw chain. A
saw chain that does not move can also
cause injuries.
Replace a worn or damaged guide bar or saw chain with
the guide bar and saw chain combination recommended
by Husqvarna. This is necessary to keep the safety
functions of the product. Refer to
35 , for a list of replacement bar and chain
combinations that we recommend.
• Guide bar length, in/cm. Information about the guide
bar length can usually be found on the rear end of
the guide bar.
• Number of teeth on bar tip sprocket (T).
• Chain pitch, in. The distance between the drive links
of the saw chain must align with the distance of the
teeth on the bar tip sprocket and drive sprocket.
• Number of drive links. The number of drive links is
decided by the type of guide bar.
28
Accessories on page
D
PITCH =
2
D
• Bar groove width, in/mm. The groove width in guide
bar must be the same as the chain drive links width.
• Chain oil hole and hole for chain tensioner. The
guide bar must align with product.
• Drive link width, mm/in.
General information about how to sharpen
the cutters
Do not use a blunt saw chain. If the saw chain is blunt,
you must apply more pressure to push the guide bar
through the wood. If the saw chain is very blunt, there
will be no wood chips but sawdust.
A sharp saw chain eats through the wood and the wood
chips becomes long and thick.
The cutting tooth (A) and the depth gauge (B) together
makes the cutting part of the saw chain, the cutter. The
difference in height between the two gives the cutting
depth (depth gauge setting).
When you sharpen the cutter, think about the following:
A
B
823 - 002 - 08.11.2018