Table of Contents
Advertisement
3.15
Service Markings
1
2
4
Filing angle (1)
Marking for correct filing angle of
top plate cutting edge and the
minimum cutter length. Chain must
be replaced if this marking is
reached during resharpening.
Side plate angle (2)
Marking for correct angle between
side plate cutting edge and bottom
of cutter.
Depth gauge (3)
Marking for correct angle of depth
gauge. Contour of depth gauge
must be filed parallel to this
marking.
Toe and heel wear (4)
Reference marking for wear on
bottom of cutter (running faces).
Uniform wear parallel to marking
indicates normal chain wear. The
running faces are normally worn as
far as the rivets when the cutter has
been filed back to the service
marking.
Uniform chain wear results in the
service markings being reached at
the same time.
26
3.16
Chip Removal
The following description of the chip
removing process refers to the
action of a single random cutter.
The guide bar is parallel to the
bottom of the kerf. The feed force is
3
transmitted via the guide bar and
toe and heel of the cutter to push the
top plate cutting edge into the
bottom of the kerf.
As a result of the top plate
clearance angle and the acute
angle of the cutting edge, the cutter
plunges into the wood as the chain
moves forwards. The cutting edge
levels out and continues running
parallel to the bottom of the cut. It is
at this point that chip removal takes
place. The depth gauge setting
determines the thickness of the chip
removed.
The side plate cutting edge
separates the chip from the wall of
the cut.
The chip removed in this way
passes through the chip channel,
under the top plate, and into the
chip space between the cutters
where it remains until the cutters
emerge from the kerf. The chip is
then ejected.
Chain and Bar Manual
Advertisement
Table of Contents
