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and enables better control of the chain saw in
unexpected situations.
•
Only use replacement bars and chains specified
by the manufacturer. Incorrect replacement bars and
chains may cause chain breakage and/or kickback.
Follow the manufacturer's sharpening and
•
maintenance instructions for the saw chain.
Decreasing the depth gauge height can lead to
increased kickback.
Kickback Safety Features
WARNING: The following features are included
on your saw to help reduce the hazard of kickback;
however such features will not totally eliminate this
dangerous reaction. As a chain saw user do not rely
only on safety devices. You must follow all safety
precautions, instructions, and maintenance in this
manual to help avoid kickback and other forces which
can result in serious injury.
•
Reduced-Kickback Guide Bar, designed with a small radius
tip which reduces the size of the kickback danger zone on
bar tip. A reduced - kickback guide bar is one which has
been demonstrated to significantly reduce the number
and seriousness of kickbacks when tested in accordance
with safety requirements for electric chain saws.
•
Low-Kickback Chain, designed with a contoured depth
gauge and guard link which deflect kickback force
and allow wood to gradually ride into the cutter. A
low-kickback chain is a chain which has met kickback
performance requirements of ANSI B175.1–2012.
Chainsaw Names and Terms
•
Bucking - The process of cross cutting a felled tree or log
into lengths.
•
Motor Brake - A device used to stop the saw chain when
the trigger is released.
•
Chain Saw Powerhead - A chain saw without the saw
chain and guide bar.
•
Drive Sprocket or Sprocket - The toothed part that drives
the saw chain.
•
Felling - The process of cutting down a tree.
•
Felling Back Cut - The final cut in a tree felling operation
made on the opposite side of the tree from the notching cut.
•
Front Handle - The support handle located at or toward
the front of the chain saw.
•
Front Hand Guard - A structural barrier between the front
handle of a chain saw and the guide bar, typically located
close to the hand position on the front handle.
•
Guide Bar - A solid railed structure that supports and
guides the saw chain.
•
Guide Bar Scabbard - Enclosure fitted over guide bar to
prevent tooth contact when saw is not in use.
•
Kickback - The backward or upward motion, or both of the
guide bar occurring when the saw chain near the nose of
the top area of the guide bar contacts any object such as a
log or branch, or when the wood closes in and pinches the
saw chain in the cut.
4
•
Kickback, Pinch - The rapid pushback of the saw which can
occur when the wood closes in and pinches the moving
saw chain in the cut along the top of the guide bar.
•
Kickback, Rotational - The rapid upward and backward
motion of the saw which can occur when the moving saw
chain near the upper portion of the tip of the guide bar
contacts an object, such as a log or branch.
•
Limbing - Removing the branches from a fallen tree
•
Low-Kickback Chain - A chain that complies with the
kickback performance requirements of ANSI B175.1–2012
(when tested on a representative sample of chain saws.)
•
Normal Cutting Position - Those positions assumed in
performing the bucking and felling cuts.
•
Notching Undercut - A notch cut in a tree that directs the
tree's fall.
•
Rear Handle - The support handle located at or toward the
rear of the saw.
•
Reduced Kickback Guide Bar - A guide bar which has been
demonstrated to reduce kickback significantly.
•
Replacement Saw Chain - A chain that complies with
kickback performance requirements of ANSI B175.1–2000
when tested with specific chain saws. It may not meet
the ANSI performance requirements when used with
other saws.
•
Saw Chain - A loop of chain having cutting teeth, that cut
the wood,and that is driven by the motor and is supported
by the guide bar.
•
Ribbed Bumper - The ribs used when felling or bucking to
pivot the saw and maintain position while sawing.
•
Switch - A device that when operated will complete or
interrupt an electrical power circuit to the motor of the
chain saw.
•
Switch Linkage - The mechanism that transmits motion
from a trigger to the switch.
•
Switch Lockout - A movable stop that prevents
the unintentional operation of the switch until
manually actuated.
Additional Safety Information
WARNING: ALWAYS use safety glasses. Everyday
eyeglasses are NOT safety glasses. Also use face or
dust mask if cutting operation is dusty. ALWAYS WEAR
CERTIFIED SAFETY EQUIPMENT:
•
ANSI Z87.1 eye protection (CAN/CSA Z94.3),
•
ANSI S12.6 (S3.19) hearing protection,
•
NIOSH/OSHA/MSHA respiratory protection.
WARNING: Some dust created by power sanding,
sawing, grinding, drilling, and other construction
activities contains chemicals known to the State
of California to cause cancer, birth defects or
other reproductive harm. Some examples of these
chemicals are:
•
lead from lead-based paints,
•
crystalline silica from bricks and cement and other
masonry products, and
•
arsenic and chromium from chemically-
treated lumber.
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