-18- model t23108 (mfg. since 7/10)
gullet Angle : the cutter gullet (see figure 18)
provides a space for the wood chips so they can
be removed by the top plate. on some chains, it
is necessary to have a 10° downward bevel on the
bottom of the gullet that forces the chips into the
path of the top plate for removal.
Depth gauge: the depth gauge (see figure 19)
is a critical element of the cutter link and is often
overlooked in chain saw sharpening. the height
of the depth gauge must be below the leading
edge of the top plate by the correct amount for
your chain saw. refer to How the Chain Cuts in
the next section and Depth gauge Setting on
Page 28 to better understand the purpose of the
depth gauge.
after sharpening the cutter, always remember to
check, and if necessary, adjust the depth gauge
setting.
Depth Gauge
Setting
Clearance
Angle
Depth Gauge
figure 19. Clearance angle and depth gauge
setting.
Clearance Angle : the clearance angle (see
figure 19) is the amount that the top plate angles
down from the leading edge to the rear of the cut-
ter link. this clearance angle allows the cutter link
to pivot up into the wood and then down again
(refer to How the Chain Cuts in the next section
for more information).
Left- & Right-Hand Cutters: Chain saws have
left- and right-hand cutter links that together make
the cut. the sharpener must be set up differently
when sharpening left- and right-hand cutters (see
figure 20) because the angles on the cutters are
reversed. it is important to clearly identify the ori-
entation of the cutter before sharpening it.
Left-Hand
Cutter
Right-Hand
Cutter
Direction of Chain Travel
figure 20. identification of left- and right-hand
cutters.