Chainsaw Terminology - Grizzly T28959 Owner's Manual

Chainsaw
Terminology
Refer to the following descriptions and illustrations
to better understand the chainsaw terminology
used in this manual.
Chain Component Identification: The cutter
links illustrated in Figure 3 do the actual cutting,
while the lower tangs of the drive links keep the
chain riding in the guide bar.
The plain ties connect the links together as they
move and pivot on the rivets.
Left-Hand
Cutter Link
Drive Link
Plain
Tie
Figure 3. Chain component identification.
Chain Pitch: The distance between any three
consecutive rivet centers divided by 2 is known as
the chain pitch (see Figure 4).
Chain Pitch
= This Distance/2
Figure 4. Chain pitch.
Model T28959 (Mfd. Since 2/19)
Right-Hand
Cutter Link
Hub
The chain pitch is the same for all links in the
chain. The smallest chain pitches for handheld
chainsaws are commonly
Chain Gauge: The chain gauge is the thickness
of the drive link tang (see Figure 5) where it fits
into the guide bar groove. The guide bar groove
must match the width of the chain gauge.
Tang
Figure 5. Chain gauge.
Top Plate: The amount of rake from the top plate
to the side plate is generally 25°–35°. This forms
the leading edge of the cut (see Figure 6).
Top Plate Leading Edge: The top plate leading
edge (see Figure 6) is a chisel-like downward
bevel on the underside of the top plate that usu-
ally is 60°. This edge removes wood chips from
the kerf.
Top Plate
Side Plate
(Top View)
Figure 6. Cutter link top plate.
⁄ ", ⁄ ", and 0.325."
1 3
4 8
Drive Link
Chain
Gauge
Top Plate
Leading
Edge
(Side View)
-5-