Chain Identification

Chain Identification

If your saw is not listed and you need help to identify your chain please use the following guide.

Chain Number:

Each chain should have a manufacturers number stamped into the drive tooth. This can be seen in the image below where the number 21 is stamped. We supply Oregon chains so if your chain is a different make please refer to our conversion chart below for the equivalent Oregon number.

Pitch Gauge Oregon Chain Carlton McCulloch Stihl Windsor Husqvarna EM Dolmar Tri-Link
1/4" 0.050" (1.3mm) 25 E1, K1NK 13RM   50K H00 S00    
325 0.050" (1.3mm) 20 K1C, K1L PM320, SPR320, 23 50J H22, H23   82 2B, 7B
325 0.050" (1.3mm) 95         H30, H37 S30    
325 0.058" (1.5mm) 21 K2 SPR328, 25 58J H25, H21, H38 S212 083, 686 2C, 7C
325 0.063" (1.6mm) 22 K3   26 63J H28, H26 S28   2D, 7D
3/8" 0.050" (1.3mm) 72 A1 PM370, SPR370 33R 50A H51, H47, H46, H80, H82 S46 100 3B, 8B
3/8" 0.058" (1.5mm) 73 A2 SPR378 35R 58A H42, H48, H49, H52, H54, H81 S48, S49, S52 99 3C, 8C
3/8" 0.063" (1.6mm) 75 A3 PM373, SPR373 36R 63A H44, H45, H53, H50, H83 S45, S53 110 3D, 8D
3/8" 0.043" (1.1mm) 90 N4   61PMN 43RG       1A
3/8" 0.050" (1.3mm) 91 N1 M370 63PM 50R H35, H36 S36 92 1B
404 0.063" (1.6mm) 59 B3S PM403, SPR403 46RS 63B H57, H64, H65 S64, S65 103, 108 4D

Number of Links:

Once you have identified the number of the chain the next thing you need is the number of links. To do this simply count the number of drive teeth (circled in the picture below)

This is now all you need to order the correct chain. Click on the chain number below to take you to the correct chain page and then enter your link count using the drop down.

20   21   22   25   59   72   73   75   91   95

If your chain has no identification numbers or they have worn off you will need the following information:

Chain Gauge:

Chain gauge is the drive link's thickness where it fits into the guide-bar groove. The gauge of the chain and the gauge of the guide bar must match. OREGON® has several gauges - such as .043", .050", .058, & .063", or in metric 1.1mm, 1.3mm, 1.5mm & 1.6mm. This is best measured using a vernier caliper.

Chain Guage

Chain Pitch:

Chain pitch is the distance between any three consecutive rivets divided by two. Pitch defines the size of the chain. OREGON® chain is made in several pitches - 1/4", .325", 3/8" & .404". To accurately measure this lay your chain out and using a rule, take the distance over 3 rivets in inches and divide this by 2.

Number of Links:

Once you have identified the pitch and guage the next thing you need is the number of links. To do this simply count the number of drive teeth (circled in the picture below)

Gauge and Pitch to Chain Number:

Once you have this information use the chart below to identify your chain type and follow the link to the chain page. From there use the drop down to select your link count.

Pitch Gauge Oregon Chain
1/4" 0.050" (1.3mm) 25
325 0.050" (1.3mm) 20
325 0.050" (1.3mm) 95
325 0.058" (1.5mm) 21
325 0.063" (1.6mm) 22
3/8" 0.050" (1.3mm) 72
3/8" 0.058" (1.5mm) 73
3/8" 0.063" (1.6mm) 75
3/8" 0.043" (1.1mm) 90
3/8" 0.050" (1.3mm) 91
404 0.063" (1.6mm) 59


We have put together a short video showing how to put these steps into practice. If you need further assistance please feel free to contact us and we will do our best to help you.

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