Sharpening Metal Blades - Echo SRM-266 Operator's Manual

SRM-266
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.
1. File each tooth at a 30° angle a
specific number of times, e.g.,
four strokes per tooth. Work
your way around the blade until
all teeth are sharp.
2. DO NOT file the 'gullet' (radius)
of the tooth with the flat file. The
radius must remain. A sharp
corner will lead to a crack and
blade failure.
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) file to renew
the radius.
X7502028004
© 02/21 ECHO Incorporated
MAINTENANCE
30º
CUTTING
TOOTH
AREA
CUTTING
TOOTH
RADIUS
30º
GULLET
(RADIUS)
30º
45