Sharpening Instructions - Stihl RMA 510 Instruction Manual

Sharpening Instructions

The type of blade initially supplied with
the mower depends on the market.
Checking the Blade
Put the mower in the cleaning
N
position.
Clean the cutting blade and inspect
N
it for damage (nicks or cracks) and
wear, replace if necessary.
Always check the mounting screw (1)
and washer (2) when replacing the
cutting blade.
WARNING
To reduce the risk of blade detachment
and resulting injury, always replace a
damaged mounting screw and washer.
RMA 510
Use a caliper gauge to check blade
N
thickness at a minimum of 5
different points.
Place a ruler on the front edge of the
N
blade and measure how far it has
been filed back.
Blade thickness must not be less than
a = 0.118 in. at any point.
2
1
Angle 'b' must be 30°.
Blade width at its narrowest point must
be at least c = 1.772 in..
Removing the Cutting Blade
Use a suitable piece of wood (2) to
N
block the cutting blade (1).
Take out the mounting screw (3)
N
and remove the washer (4).
Check the blade mounting screw (3)
N
and washer (4) for damage.
Remove the cutting blade (1).
N
Sharpening Instructions
c
STIHL recommends that you have the
blade resharpened by your STIHL
a
servicing dealer. An incorrectly ground
b
cutting blade (wrong sharpening angle,
out-of-balance) can cause operational
problems and could cause the blade to
break or fracture, resulting in severe
personal injury or death to the operator
or bystanders.
N
N
N
N
Installing the Cutting Blade
1
4
3
2
N
WARNING
Cool the cutting blade during
resharpening, e.g. with water.
Sharpen the cutting blade uniformly
to avoid out-of-balance and
vibrations.
Sharpen the cutting edges to an
angle of 30°.
Use fine emery paper to remove any
burrs from the cutting edges after
resharpening.
Clean mounting faces and
thread (1).
English
1
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