Portek ULTRA Mk2, Instruction Manual

Page: 9 / 12

Before beginning to sharpen chainsaw chain please carefully read the following hints:
• A chain consists of several cutter links,
drive links and tie straps. The cutter links
consist of the cutting tooth and the depth
gauge.
• The pitch of the chain is measured in
inches. The pitch is determined by
measuring the distance ‘A’ of the three
rivets and dividing by two.
Example: 8.25
mm = .325”
• Example of a chain description: .325”/1.3
- 56. Where .325” stands for the chain
pitch, 1.3 mm stands for the width of
drive links, 56 stand for the number of
drive links.
• The top plate cutting angle is important inorder to chisel out
wood fibres and lift them up and out of the kerf. For most
chains the top plate cutting angle has to be 60°.
• The filing angle will be reduced each time the chain is
sharpened. To ensure ultimate cutting performance, the depth gauge has to be
reduced too. The depth gauge setting in respect to the top plate is approximately
.025” = 0.64mm. Make sure that all depth gauges are the same.
Hints for Sharpening
Cutting tooth
Depth Gauge
: 2
A
= 16.5 mm
= 8.25 mm
60°
Cutter Link
Tie Strap Drive Link
.025“ = 0,64 mm
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