Portek ULTRA Mk2, Инструкция по эксплуатации

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• The filing angle must be equal for all cutting teeth. The angle has to be approximately
25° - 35° according to the chain type. The chain consists of left and right teeth.
• Sharpening teeth to unequal blade lengths can cause a side drift when sawing;
resulting in unwanted inclined saw cuts.
• Before you start to sharpen the chainsaw chain carefully check it for damage, such as:
bent or broken drive links, broken cutter teeth, loose rivets or broken rivet heads. If
any damage if found, replace the whole chainsaw chain or have the damage by an
authorized service centre.
• Badly sharpened chains increase the risk of kickback.
• When the cutter teeth are reduced for more then 4mm the chain should not be used
any more and should be disposed of.
• A sharp chainsaw chain produces large cutting chips and pulls itself automatically into
the timber. When it begins to become blunt, or starts to show signs of abrasion,
progressively saw-dust will form during any cutting operation. You have to sharpen
the chain when you notice that excessive force is needed to cut through the timber
and the saw does not “pull” anymore.
Unequal sharpened teeth
not ok ok
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