Echo SRM-280 Manuel d'utilisateur télécharger pdf (Page 26)

s h a r p e n I n g m e t a l b l a d e s

Three styles of metal blades are approved for use on the ECHO Brush

Cutter. The 8-tooth blade can be sharpened during normal mainte-

nance. The clearing blade and 80 tooth blade require professional

service.

Before sharpening, CLOSELY inspect blade for cracks (look at the

bottom of each tooth and the center mounting hole closely), missing

teeth and bending. If ANY of these problems are discovered, replace

the blade.

When sharpening a blade, always remove the same amount of materials

from each tooth to maintain balance. A blade that is not balanced will

cause unsafe handling due to vibration and can result in blade failure.

Tool required: Flat le (preferred). Electric grinder if special care is

used. Round (rat tail) le for gullet (radius).

1. File each tooth at a 30 degree angle a specic number of times,

eg. 4 strokes per tooth. Work your way around the blade until

all teeth are sharp.

2. DO NOT le the 'gullet' (radius) of the tooth with the at le.

The radius must remain. A sharp corner will lead to a crack and

blade failure.

IMPORTANT

If an electric grinder is used, use care not to overheat teeth, do not

allow tips/tooth to glow red or turn blue. DO NOT place blade in

cooling water. This will change the temper of the blade and could

result in blade failure.

3. After sharpening teeth, check each tooth radius for evidence of a

square (sharp) corner. Use the round (rat tail) le to renew the

radius.

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Echo SRM-280 Manuel d'utilisateur Page 26