# Readers ask: What Do The Numbers Mean On Oregon Chain?

Contents

- 1 How do you read a chain in Oregon?
- 2 What does 91 mean on chainsaw chain?
- 3 What do the numbers mean on a chain?
- 4 What is the difference between.325 and 3/8 chain?
- 5 What is the most aggressive Oregon chainsaw chain?
- 6 Why does my chainsaw chain dull so quickly?
- 7 Does the number of drive links matter?
- 8 How do I know my chain size?
- 9 What number is a 520 chain?
- 10 What is chain pitch?
- 11 How many links does a 16 inch chainsaw have?
- 12 What size file do you need for a 3/8 chain?

## How do you read a chain in Oregon?

Chain pitch is the size of the chain and is defined as the distance between any three consecutive rivets divided by two. Oregon chain is made in several pitches – 1/4″ is the smallest, 3/8″ is the most popular, and 3/4” is the largest.

## What does 91 mean on chainsaw chain?

91 = 3/8 low profile pitch.050 gauge or 1.3mm. 95 =.325 pitch.050 gauge or 1.3mm. Carlton drive link codes. A1 = 3/8 pitch.050 gauge. A2 = 3/8 pitch.058 gauge.

## What do the numbers mean on a chain?

Chain size is in inches, the three digit number used to describe the chain size is based on the “rule of eights”. The first digit is for chain pitch. This is the distance between the pins. The second and third digits combine for roller width, with a decimal point inserted between the second and third digits.

## What is the difference between.325 and 3/8 chain?

The three-eighths chain is a beefier saw and better suited to one that has more horsepower. It has larger teeth and a heavier duty chain, so it requires more horsepower to operate correctly. 325-inch chain for those saws between 40 and 60 cc.

## What is the most aggressive Oregon chainsaw chain?

404 chains are the most aggressive. The 3/8 is a more flexible size with adequate strength, low weight and substantial cutting speed. It can also can handle the power of a 50-100cc chainsaw engine.

## Why does my chainsaw chain dull so quickly?

If your chain dulls quickly, then it could be a couple of things. Your chain will cut too deep or barely cut at all if your rakers or depth gauges are filed down too much or not enough, respectively. Get yourself a depth gauge appropriate for your saw and use it every time you sharpen your chain.

## Does the number of drive links matter?

Number of individual drive links must be counted. No exceptions. Simple length measurements (like “a 2 foot chain) are not helpful for correctly matching chains. Chain length is determined by a combination of distance between links (pitch) and the number of links.

## How do I know my chain size?

To measure the chain size, if you have just the sprocket, use calipers to measure between the teeth. Measure from center to center of where the chain roller would set between the teeth that will give you the pitch. Once you know the pitch you can determine what chain size you would need.

## What number is a 520 chain?

(3) The size of a chain is designated by a three-digit number (520, for example). The distance from the center of one pin to the center of the next is called pitch. Pitch is represented by the first digit, which is 4, 5 or 6.

## What is chain pitch?

Chain pitch is the size of the chain and is defined as the distance between any three consecutive rivets divided by two. The easiest way to determine the pitch of your chain is to look at the number stamped on the drive link.

## How many links does a 16 inch chainsaw have?

A 16″ bar normally requires 66 drive links with.

## What size file do you need for a 3/8 chain?

Generally, 1/4 and 3/8 “low profile chains require a 5/32” file. 0.325 “chains require a 3/16” row and standard 3/8 “and 0.404” chains require a 7/32 “row.