Jonsered POWERLITE 50C - Manual (Page 11)

English – 11
SAFETY INSTRUCTIONS
Chain
A chain is made up of a number of links, which are available
in standard and low-kickback versions.
Combining these links in different ways gives different
degrees of kickback reduction. In terms of kickback reduction
alone, four different types of link are available.
Some terms that describe the bar and chain
When the cutting equipment supplied with your saw becomes
worn or damaged you must replace it with one of the bars and
chains recommended by us. See the Technical data section.
Bar
• Length (inches/cm)
• Number of teeth on bar tip sprocket (T). Small number =
small tip radius = low risk of kickback.
• Chain pitch (inches). The spacing between the drive links
of the chain must match the spacing of the teeth on the
bar tip sprocket and drive sprocket.
• Number of drive links. The number of drive links is
determined by the length of the bar, the chain pitch and
the number of teeth on the bar tip sprocket.
• Bar groove width (inches/mm). The groove in the bar must
match the width of the chain drive links.
• Chain oil hole and hole for chain tensioner. The bar must
be matched to the chain saw design.
Chain
• Chain pitch (inches)
• Drive link width (mm/inches)
• Number of drive links.
• Level of kickback reduction. The level of kickback
reduction offered by a chain is only indicated by its model
number. See the Technical data section to find the model
numbers of chains that are recommended for use with
your model of chain saw.
Sharpening your chain and adjusting raker
clearance
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. Wood powder would
be the only result.
None Standard Low-kickback
Cutting link
Drive link
Side link
Level of kick-
back reduction
Cutting link Drive link Side link
Low
Standard
High
Extra high
!
WARNING! The risk of kickback is increased
with a badly sharpened chain!