It may also occur during limbing.
a)
–
saws with a displacement of less than angles that may occur in real life cutting
3.8 cubic inches situations. Compliance with § 5.12 of
ANSI B 175.1-1991 does not automatic-
ally mean that in a real life kickback the
bar and chain will rotate at most 45°.
The greater the force of the kickback
reaction, the more difficult it becomes for
the operator to control the saw. Many
factors influence the occurrence and
force of the kickback reaction. These
include chain speed, the speed at which
the bar and chain contact the object, the
angle of contact, the condition of the
chain and other factors.
must, in their original condition,
meet a 45° computer derived
kickback angle when equipped with
certain cutting attachments.
and must be equipped with at least
two devices to reduce the risk of
kickback injury, such as a chain
brake, low kickback chain, reduced
kickback bar, etc.
–
!
Warning!
In order for powerheads below 3.8 cubic
inch displacement to comply with the
computed kickback angle requirements
of § 5.12 of ANSI B 175.1-1991 use only
the following cutting attachments:
The type of bar and saw chain you use
is an important factor in the occurrence
and force of the kickback reaction.
b)
–
saws with a displacement of 3.8 cubic
inches and above
–
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
powerhead or
Some STIHL bar and chain types are
designed to reduce kickback forces.
STIHL recommends the use of reduced
kickback bars and low kickback chains.
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.
–
ANSI B 175.1-1991 chainsaw kickback
standard
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.
–
replacement chain designated
“low kickback saw chain’’.
See the section on "Low kickback saw
chain and reduced kickback bars"
Section 5.12 of ANSI standard B 175.1–
1991,
sets certain performance and
design criteria related to chainsaw
kickback.
!
To comply with section 5.12 of ANSI B
175.1-1991:
Warning!
The computer derived angles of § 5.12 of
ANSI B 175.1-1991 may bear no rela-
tionship to actual kickback bar rotation
13
| Categories | Chainsaw Manuals, STIHL Chainsaw Manuals |
|---|---|
| Tags | STIHL 044 |
| Download File |
|
| Language | English |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Chainsaw |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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