
ENGLISH (Original instructions)
cause the saw chain to break.
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Do not sharpen the chain when the cutter length has reached 3 mm or shorter. The chain must be replaced with
new one.
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The chip thickness is determined by the distance between the depth gauge (round nose) and the cutting edge.
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The best cutting results are obtained with following distance between cutting edge and depth gauge.
•
Chain blade 90PX : 0.65 mm (0.025″)
•
Chain blade 91PX : 0.65 mm (0.025″)
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The sharpening angle of 30° must be the same on all cutters. Different cutter angles cause the chain to run roughly
and unevenly, accelerate wear, and lead to chain breaks.
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Use a suitable round file so that the proper sharpening angle is kept against the teeth.
•
Chain blade 90PX : 55°
•
Chain blade 91PX : 55°
File and file guiding
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Use a special round file (optional accessory) for saw chains to sharpen the chain. Normal round files are not
suitable.
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Diameter of the round file for each saw chain is as follows:
•
Chain blade 90PX : 4.5 mm (3/16″)
•
Chain blade 91PX : 4.0 mm (5/32″)
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The file should only engage the cutter on the forward stroke. Lift the file off the cutter on the return stroke.
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Sharpen the shortest cutter first. Then the length of this shortest cutter becomes the standard for all other cutters
on the saw chain.
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Guide the file as shown in the figure.
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The file can be guided more easily if a file holder (optional accessory) is employed. The file holder has markings for
the correct sharpening angle of 30° (align the markings parallel to the saw chain) and limits the depth of penetration
(to 4/5 of the file diameter).
1.File 2.Saw chain
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