Low kickback saw chain
A saw chain that is designated as Low kickback saw
chain, meets the low kickback requirement specified in
ANSI B175.1-2012.
Kickback and guide bar nose radius
For guide bars with a sprocket nose the nose radius is
specified by the number of teeth, such as 10T. For solid
guide bars the nose radius is specified by the dimension
of the nose radius. For a given guide bar length, you can
use a guide bar with smaller nose radius than given.
Guide bar Saw chain
Length, in/cm Pitch, in Gauge, mm/in Max. nose ra-
dius
Type Length, drive
links (no.)
Low kickback
13/33 0.325 1.3/0.050 10T Jonsered H30 56 Yes
15/38 64
18/46 72
13/33 0.325 1.5/0.058 10T Jonsered H25 56 Yes
15/38 64
18/46 72
The usable cutting length is usually 1 in less than the
nominal guide bar length.
Filing equipment and filing angles
Use a Jonsered file gauge to sharpen the saw chain. A
Jonsered file gauge makes sure that you get the correct
filing angles. The part numbers are given in the table
below.
If you are not sure how to identify the type of saw chain
on your product, refer to www.jonsered.com for more
information.
H30 4.8 mm / 3/16 in 504 98 16-74
0.025 in / 0.65
mm
30° 85°
H25 4.8 mm / 3/16 in 5049816-75
0.025 in / 0.65
mm
30° 85°
1049 - 003 - 14.02.2019 35
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