Chain Brake And Cka Angle; Computed Kickback Angle (Cka) Table - Poulan Pro 2375 Instruction Manual

Reduce_ Kickback Symmetrical Guide Bar
_atl Radius Tip
Symmetrical G=de Bar t_
{
Large Radius Tip
• 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. Low-
Kickback Chain has met kickback per-
formance requirements when tested on a
representative sample of chain saws be-
low 3.8 cubic inch displacement specified
in ANSI B175.1.
Comcured Depth Gauge
__ Elongated Guard Unk Deflects
Ckba_k form
Low- _3c_baCk
and allows wood
Chain to graduaJly ride
into cutter
_Can Ob6tr_ Matari_d
Not a Low -:_¢kback Chain
• Front Hand Guard, das_Jned to reduce the
chance of your lefthand contactingthe chain
• if your hand slipsoff the front handlebar.
Position of front and rear handlebars, de-
signed with distance between handles and
"in-line" with each other. The spread and
"in-lice" position of the hands provided by
this design work together to gwe balance
and resistance in controlling the pivot of
the saw back toward the operator if kick-
back OCcurs.
CHAIN BRAKE AND CKA ANGLE
• Chain Brake, designed to stop the chain in
the event of kickback.
_kWARNING: WE DO NOT REP-
RESENT AND YOU SHOULD NOT AS-
SUME THAT THE CHAIN BRAKE WILL
PROTECT YOU IN THE EVENT OF A
KICKBACK. Kickback is a lightnir_ fast ac-
tion which throws the bar and rotating chain
back and up toward the operator. Kickback
can be caused by allowing contact of the bar
tip in the danger zone with any hard object.
Kickback can also be caused by pinching the
saw chain along the top of the guide bar. This
action may push the gluida bar rapidly back
toward the operator. Either of these events
may cause you to lose control of the saw
which could result in serious lo'ulurv(oreven
death. DO NOT RELY UPON ANY'OF THE
DEVICES BUILT INTO YOUR SAW. YOU
SHOULD USE THE SAW PROPERLY AND
CAREFULLY TO AVOID KICKBACK. Re-
duced-kickback guide bars and low-kick-
back saw chains reduce the chance and
magnitude of kickback and are recom-
mended. Your saw has a low kickback chain
and bar as original equipment. Repairs on a
chain brake should be made by an autho-
rized servicleg dealer. Take your unit to the
place of purchase if purchased from a ser-
vicing dealer, or to the nearest authorized
master service dealer.
• 33pcontact in some cases may cause a light-
ning fast reverse REACTION, kicking guide
bar up and back toward operator.
• Pinching the saw chain afon9 the top of the
guide bar may push the guide bar rapidly
back toward the operator.
• Either of these reactions may cause you to
lose controlof the saw which could result in
seltous injury.Do not rely exclusivelyupon
devices built into your saw,
_' WARNING: Computed kickback
angle (CKA) listedonyour saw and listed inthe
CKA tablebelow represents angle of kickback
your bar and chain combin_ions will have
when tested in accordance with CSA Cana-
dian Standards Associat on and ANSI stan-
dards. When purchasingreplacement bar and
chain, consideraltons should be given to the
lower CKA vaJues.Lower CKA values repre-
sent saferangles to the user, highervalues in-
dicate more angle and higherkick energies.
Computed angles represented indicate tutal
energy and angle associated withoutactivation
of the chain brake dudng kickback.Activated
angle representschain stopping time relativeto
activation angle of chain break and resulting
kickangle of saw. In all cases lower CKA val-
ues represent a safer operating environment
for the user.
The following guide bar and chain combina-
itonsmeet kickback req=uirements of CSA
Standards Z62.1, Z62.3, & ANSI B175.1when
used on saws listed inthis manual.Use ofbar
and chain combinaltons other thanthoselisted
isnotrecommended and may notmeet the
CKA requirements per standard.
Computed kickback angle (CKA) Table
BAR
MODEL
1950/2050
2025/2075/
2150/2150PR
2155/2175/
2350/2375
PIN Length CHAIN P/N
952044368 14" 952051209
952044370 16" 952051211
952044419 15" 952051338
CKAwithoutchain brake
24 °
19 °
14 °
5