Chain Brake and CKA Angle

Reduced Kickback Symmetrical Guide Bar

Small Radius Tip

Symmetrical Guide Bar

Large Radius Tip

S 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.

Contoured Depth Gauge

Elongated Guard Link

Deflects

Low---Kickback

kickback force

and allows wood

Chain

to gradually ride

into cutter

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 guide bar rapidly back toward the op- erator. Either of these events may cause you to lose control of the saw which could result in serious injury or even death. DO NOT RELY UPON ANY OF THE DEVICES BUILT INTO YOUR SAW. YOU SHOULD USE THE SAW PROPERLY AND CAREFULLY TO AVOID KICKBACK. Reduced--kickback guide bars and low--kickback saw chains reduce the chance and magnitude of kickback and are recommended. Your saw has a low kickback chain and bar as original equipment. Repairs on a chain brake should be made by an autho- rized servicing dealer. Take your unit to the place of purchase if purchased from a servic- ing dealer, or to the nearest authorized master service dealer.

STip contact in some cases may cause a light- ning fast reverse REACTION, kicking guide

bar up and back toward operator.

SPinching the saw chain along the top of the guide bar may push the guide bar rapidly back toward the operator.

SEither of these reactions may cause you to lose control of the saw which could result in serious injury. Do not rely exclusively upon devices built into your saw.

WARNING:

Computed kickback

angle (CKA) listed on your saw and listed in the

Can Obstruct Material

CKA table below represents angle of kickback

Not a Low---Kickback Chain

your bar and chain combinations will have

when tested in accordance with CSA (Cana-

S Front Hand Guard, designed to reduce the

dian Standards Association) and ANSI stan-

chance of your left hand contacting the chain

dards. When purchasing replacement bar and

if your hand slips off the front handlebar.

chain, considerations should be given to the

S Position of front and rear handlebars, de-

lower CKA values. Lower CKA values repre-

signed with distance between handles and

sent safer angles to the user, higher values in-

“in-line” with each other. The spread and

dicate more angle and higher kick energies.

“in-line” position of the hands provided by

Computed angles represented indicate total

this design work together to give balance

energy and angle associated without activation

and resistance in controlling the pivot of

of the chain brake during kickback. Activated

the saw back toward the operator if kick-

angle represents chain stopping time relative to

back occurs.

activation angle of chain break and resulting

kick angle of saw. In all cases lower CKA val-

S Chain Brake, designed to stop the chain in

ues represent a safer operating environment

the event of kickback.

for the user.

WARNING: WE DO NOT REP-

The following guide bar and chain combina-

tions meet kickback requirements of CSA

RESENT AND YOU SHOULD NOT AS-

Standards Z62.1, Z62.3, & ANSI B175.1

SUME THAT THE CHAIN BRAKE WILL

when used on saws listed in this manual.

PROTECT YOU IN THE EVENT OF A KICK-

Use of bar and chain combinations other

BACK. Kickback is a lightning fast action

than those listed is not recommended and

which throws the bar and rotating chain back

may not meet the CKA requirements per

and up toward the operator. Kickback can be

standard.

Computed kickback angle (CKA) Table

LE SERIES

BAR

CKA without chain brake

MODEL

P/N

Length

CHAIN P/N

1950/1975/2050

952044368

14!

952051209

24_

2055/2075/

952044370

16!

952051211

19_

2150/2150PR

2155/2175/

952044418

18!

952051338

14_

2350/2375