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TORO GM 345/325-D Cutting Units
Notes
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77
Quality Of Cut
Inspecting and Sharpening Rotary Mower Blades
Rotary mowers cut grass by the blade’s cutting surface impacting against the grass stems at a high velocity. To
assure good quality of cut, the cutting edge of the blade must be kept in a sharp condition. A dull blade will
produce a ragged cut and will require an excessive amount of engine horsepower to rotate the blade through the
grass. The most common cause for rotary mowers not giving a good quality of cut is due to dull cutting edges
and/or bent blades.
Whenever a blade is removed for sharpening:
A. The blade must be checked to assure that it is not bent and that it has the correct attitude in relation to
the housing and ground surface.
B. The blade must be sharpened correctly.
C. The blade balance must be checked each time the blade is sharpened.
D. When installing the blade, it is very important that the blade retaining bolt or nut be tightened to the
correct torque so it will not loosen during operation.