English / USA
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.
The type of bar and saw chain you use is an important factor in the occurrence and force of the kickback reaction. Some STIHL bar and chain types are designed to reduce kickback forces. STIHL recommends the use of reduced kickback bars and low kickback chains when your Rescue Saw is being used for normal
ANSI B
Section 5.11 of ANSI standard
B
To comply with section 5.11 of ANSI B
a)saws with a displacement of less than 3.8 cubic inches (62 cm³).
–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.
b)saws with a displacement of
3.8 cubic inches (62 cm³) 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.
The computer derived angles for saws below 3.8 cubic inch (62 cm³) displacement are measured by applying a computer program to test results from a kickback test machine.
!Warning!
The computer derived angles of § 5.11 of ANSI B
§5.11 of ANSI B
!Warning!
In order for powerheads below 3.8 cubic inch (62 cm³) displacement to comply with the computed kickback angle requirements of § 5.11 of ANSI B 175.1- 2000 use only the 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 powerhead or
–replacement chain designated "low kickback saw chain.“
See the section on "Low kickback saw chain and reduced kickback bars" in these Safety Precautions.
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