5
SymmetricalGuideBar
LargeRadius Tip
SLow--Kickback Chain, designed with a
contoured depth gauge and guard link
which deflect kickback force and allow
woodto gradually ride into the cutter. Low--
Kickback Chain has met kickbac k per-
formance requirements when tested on a
representative sample of chain saws be-
low 3.8 cubic inch displacement specified
inA NSI B175.1.
Low --- K i c kb a c k
Chain
Not aL o w --- K i ck b a c k C h a i n
CanObstruct Material
Contoured De pth Gauge
Elongated Guard Link
Deflects
kickback force
andal lows wood
tograduall y ride
Intocutter
SFront Hand Guard, designed to r educe the
chance of your left hand contacting the chain
if your hand slips off the front handlebar.
SPosition of front and rear handlebars, de-
signedwith distanc ebetween handles and
“in-line” with each other. The spread and
“in-line” position of the hands provided by
this design work together to give balance
and resistance in controlling the pivot of
the saw back toward the operator if kic k-
back occurs.
CHAIN BRAKE AND CKA ANGLE
SChainBrake, designed to stop the chain in
the event of kickback.
WARNING: WE DO NOT REP-
RESENT AND YOU SHOULD NOT AS-
SUME THAT THE CHAIN BRAKE WILL
PROTECT YOU IN THE EVENT OF A
KICKBACK. Kickbackis a lightning fas tac -
tion which throws the bar and rotating chain
back and up toward the operator. Kick back
canbe caus ed by allowing contact of the bar
tip in the danger zone with any hard object.
Kickbackc an also be caused by pinching the
sawchain along the top of the guide bar. This
action may push the guide bar rapidly back
toward the operator. Eitherof these ev ents
may cause you to lose control of the s aw
which could result in serious injury or even
death. DO NOT R ELYUPON A NY OF THE
DEVICES BUILTINTO YOUR SAW. YOU
SHOULDUSE THE SAW PROPERLY AND
CAREFULLY TOAVOID KICKBACK. Re-
duced--kickback guide bars and low--kick-
back saw chains reduce the chance and
magnitude of kickback and are recom-
mended. Yours aw has alow kic kback chain
andbar as original equipment. Repairs on a
chain brake should be made by an autho-
rized servicing dealer. Takeyour unit to the
place of purchase if purchased from a ser-
vicing dealer, or to the nearest authorized
master service dealer.
STipcontact in some c ases may cause a light -
ning fast reverse REACTION, kicking the
guide bar up and back toward the operator.
SPinchingthe saw c hain along the top of the
guide bar may push the guide bar rapidly
back toward the operator.
SEitherof these reactions may c ause you to
lose control of the saw which could res ult
in serious injury.Do not rely exclusively
uponthe safety devices built into your saw.
WARNING: Computed k ickback
angle(CK A) listed on your saw and listed in
the CKA table below r epresents angle of
kickback your bar and chain combinations
will have when tested in accordance with
CSAand ANSI standards. When purc hasing
replacement bar and chain, considerations
should be given to the lower CKA values.
LowerCKA values represent safer angles to
the user, higher values indicate more angle
andhigher kickenergies . Computed angles
represented in the non-activated column in-
dicate total energy and angle associated
without activation of the chain brake during
kickback. Activated angle repres ents chain
stopping time relative to activation angle of
chainbr ake and resulting kick angle of saw.
In all cases lower CKA values represent a
safer operating environment for the user.
The followingguide bar and chain combina-
tions meet kickback requirements of CSA
Z62.1,Z62.3, & ANSI B 175.1when us edon
saws listed in this manual. Use ofbar and
chaincombinations other than those lis ted is
not recommended and may not meet the
CKA requirements per standard.
Computedkickback angle (CKA) Table
BAR
P/N Length CHAINP/N
MODEL
952044418 952051548 14_
CKAwithout chain brake
SM4018 18″
NOTE: If this saw is to be used forc ommer-
cial logging, a chain brake is required and shall
not be removed or otherwise disabled to com-
ply with Federal OSHA Regulations for Com-
mercial Logging.
SAFETY NOTICE: Exposure to vibrations
through prolonged use of gasoline powered
hand tools could cause blood vessel or nerve
damage in the fingers, hands, and joints of
people prone to circulation disorders or
abnormal swellings. Prolonged use in c old
weather has been linked to blood vessel