SRM-2120 MAINTENANCE
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Sharpening Metal Blades
Metal blades are very sharp and can cause severe injuries, even
if unit is off and blades are not moving. Avoid contact with
blades. Wear gloves to protect hands.
Several styles of metal blades are approved for use on the Brushcutter. The
8-tooth blade can be sharpened during normal maintenance. 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.
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.
5. File each tooth at a 30 degree
angle a specific number of
times, e.g., four strokes per
tooth. Work your way around
the blade until all teeth are
sharp.
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