CHAIN DRIVE-LINK NUMBER IDENTIFICATION
Nearly all OREGON
®
chains are named by a part number made up of a
number (see below), followed by one or two letters (see page 9).
OREGON
®
Part-number Examples: 18 H, 72LP, 91VG
The Numbers: 18 H, 72 LP, 91 VG
The numbers are stamped on the chain’s drive links and indicate the
physical size of the chain (pitch and gauge).
CHAIN
PITCH
GAUGE
NUMBER
IN
MM
11 3/4" .122" 3.1
16 .404" .063" 1.6
18 .404" .080" 2.0
20 .325" .050" 1.3
21 .325" .058" 1.5
22 .325" .063" 1.6
25 1/4" .050" 1.3
26 .404" .058" 1.5
27 .404" .063" 1.6
33 .325" .050" 1.3
34 .325" .058" 1.5
35 .325" .063" 1.6
58 .404" .058" 1.5
59 .404" .063" 1.6
72 3/8" .050" 1.3
73 3/8" .058" 1.5
75 3/8" .063" 1.6
90 3/8" .043" 1.1
91 3/8" .050" 1.3
95 .325" .050" 1.3
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