model t23108 (mfg. since 7/10) -19-
How the Chain Cuts the depth gauge setting determines how big of a
bite the cutter takes ("2–3"). it is imperative that
the depth gauge is set below the leading edge
of the top plate by the proper amount so that the
cutter can move into the wood.
if the depth gauge is too high or too low, it will
prevent the cutter from pivoting forward and self-
feeding into the wood. refer to Depth gauge
Setting on Page 28 for additional information.
also important is the amount of the clearance
angle. the downward slope of the top plate
enables the cut ter to move into the wood ("2")
and then forces it out again ("3–4") to complete
the cut.
always use the chain manufacturer's specifica-
tions for the cutter specifications when sharpen-
ing the chain.
1
Chain Travel
2345
figure 21. the rocking self-feeding motion of the cutter link during a cutting operation.
as illustrated in figure 21 below, when the cutting
point at the top of the cutter moves against the
wood ("1"), the front of the cutter pivots up until the
depth gauge meets the wood ("2"), which forces
the cutter to pivot even farther into the woo d ("3")
to make the cut.
When the rear of the top plate meets the wood
("4"), it forces the cutter to continue pivoting for-
ward and move out of the kerf, producing wood
chips which are carried away by the top plate
angle in the final position ("5") to complete the
cut.
the goal of this rocking motion is to allow the
chain saw to self-feed into the wood and do the
work without requiring the operator to force the
chain into the wood. this makes the job easier
and reduces wear on the saw and c hain.