Owner's Manual

SECTION 3-KICKBACK, PUSH AND PULL
and how to control these reaction forces.
WARNING
Also read the instructions (#17067)
which came with the SAFE*T.TIP@: We
strongly urge your protecting yourself
against chain saw kickback by using the
SAFE*T.TIP@.
But remember, that for the few types of cuts where a
SAFE*T*TIP cannot be used, you should use the tech-
niques described in this Owner's Manual.
'Pat. Pending
WHAT IS CHAIN SAW KICKBACK?
In the operation of a chain saw, engine torque is trans-
ferred
tothechain.Thisenergy is then used tocut wood. If
the chain suddenly hits a solid object (or takes too largea
cut) and is stopped for an instant, the engine torque is
transferred to the guide bar and chain saw as a rotation
around the center of mass. The direction of the reaction
force depends on where the contact is made along the
guide bar. If made at the upper
90" quadrant of the bar
nose, the reaction will be in an upward arc toward the op-
erator. This arcing movement of the saw blade is called
kickback. Kickback is the most dangerous of the reactions
which can cause loss of control. When properly installed,
the
SAFE.TmTIP@ prevents kickback. But it is not a gen-
eral insurance against "accidents" with a chain saw.
MOST DANGEROUS
KICKBACK ZONE
WITH SOLID
SAFE.T*TIP PREVENTS CO
SOLID OBJECTS, PREVENT BACK WHEN
PROPERLY INSTALLED
SOLID OBJECTS
Kickback Reaction Zones
SOLID OBJECT
I THE SAFE*T*TIP DOES NOT PREVENT OR REDUCE
PUSH AND PULL REACTION.
I
Push and Pull Reactions.
I
HEN INCORRECTLY WHEN NOSE STRIKES IF NOSE TTOM OF SAW CUT
STARTING TO BORE
ANY SOLID OBJECT
WHEN REINSERTED INTO PREVIOUS CUT
1
Situations Known to Cause Saw to Kick Back Towards Operator
Courtesy of ParkinLube.com