To
comply with section 4.12
of ANSI B 175.1-1985:
a)
saws with a displacement of less than
3.8 cubic inches
must, in
their original condition,
meet a
45°
computer
derived
kickback angle when equipped
with certain
cutting attachments
described on page 12,
and must be equipped
with at least two devices to
re-
duce the
risk of kickback injury, such as a chain brake,
low
kickback chain, reduced kickback bar,
etc.
b) saws with a displacement
of 3.8 cubic inches and
above
must be equipped with
at least one device designed
to reduce the risk
of kickback injury such as a chain
brake, low kickback chain, reduced kickback bar,
etc.
These kickback requirements do not apply to
chain saws
fitted with bow guides. Bow-equipped
saws are
only
for
use by thoroughly
instructed and experienced operators.
Use of bow
guides may result in serious or fatal injury.
See
section entitled "Bow Guides"
of this Manual.
The
computer
derived
angles for
saws
below 3.8 cubic
inch displacement
are
measured by
applying a computer
program to test results from a kickback
test machine.
Warning!
The
computer derived angles
of § 4.12 of
ANSI B
175.1
1985 may
bear no
relationship
to
actual
kickback bar rota-
tion
angles that
may occur
in real life
cutting situations.
Compliance with § 4.12 of ANSI B 175.1-1985 does
not au-
tomatically mean that in a real
life kickback the bar and
chain will rotate at most 45°.
Warning
In order for powerheads below 3.8 cubic inch displace-
ment
to comply with the computed kickback angle re-
quirements of § 4.12 of ANSI B
175.1-1985
use
only the
12
following cutting attachments:
bar and chain combinations
listed
as
complying in the
"Specifications" section of the Owner's
Manual or
other replacement bar
and chain combinations marked
in
accordance with the
standard for
use on the power-
head
or
replacement chain designated "low
kickback
saw
chain".
Warning! There are
potential powerhead and bar
combi-
nations with which low kickback saw
chains
can be used
which have not been specifically certified
to
comply
with
the 45° computer derived kickback angle of § 4.12 of ANSI
B 175.1-1985.
Some low kickback chains have not
been
tested with all powerhead and bar combinations.
STIHL offers a
variety of bars and chains.
STIHL reduced
kickback
bars and
low kickback chains are designed to
re-
duce
the risk of kickback injury. Other
chains
are
designed
to
obtain higher cutting efficiency or
sharpening ease but
may result in
higher kickback tendency.
STIHL has developed a
color code system to help
you
identify the STIHL
reduced kickback bars and low kick-
back chains. Cutting attachments with green
warning de-
cals or green
labels on the packaging
are
designed
to
re-
duce the risk of kickback injury. The matching of green de-
caled powerheads under 3.8 cubic inch displacement with
green labeled bars and green
labeled chains gives com-
pliance with the computed kickback angle
requirements of
ANSI B 175.1-1985 when the products
are
in
their original
condition. Products with yellow
decals or labels
are
for
users with
extraordinary cutting needs and experience
1)
"Low kickback
saw chain"
is a chain which has met the
kickback
performance requirements of §
4.12.2.4
of
ANSI
B
175.1-1985 (Safety Requirements for
Gasoline-Powered
Chain
Saws) when tested on a
selected representative
sample of
chain saws below 3.8 cubic
inch displacement
specified in ANSI B 175.1-1985.
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