Oregon Harvester - Terminology; Saw Chain Pitch; Saw Chain Gauge

Saw Chain
19 Mechanical Timber Harvesting Handbook
Terminology
Saw Chain Pitch
Saw chain pitch is the distance between any three consecutive
rivets, divided by two. Oregon Harvester saw chain is available in
both .404" and 3/4" pitch.
Saw Chain Gauge
Saw Chain Gauge is the term used to describe the thickness of the
drive link tang, which fits into the groove of the guide bar.
Oregon Harvester saw chain gauges are:
• 0.080" (2.0 mm)
Oregon has an 18X or 19X stamped on the drive link tang.
• 0.122" (3.1 mm)
Oregon has an 11 stamped on the drive link tang.
Ensure you use the correct recommendations for your saw chain
(refer to the tables that follow).
A
B
N
o
25 = .025"
30 = .030"
50 = .050"
60 = .060"
D
C
N
o
A. Top plate angle C. Top plate cutting angle
B. File guide angle D. Depth Gauge Setting
OREGON
18X 18X 18X
OREGON
÷ 2
Tang
Saw Chain