Is your chainsaw starting to seem dull and not perform as well? Looks like it's time to replace the chain. In order to do this, you will need to know the length of both the chainsaw blade as well as the length and size of your chain. If you've checked out the manufacturers' charts, they might seem a little overwhelming. But it really is pretty simple once you understand what's involved in the length of the blade and chainsaw chain.
When you're ready to replace your chain, the first thing to do is determine the size of your chainsaw bar. If you happen to have an Oregon chainsaw, this should be easy. Just check the first two numbers of the ten-digit model number that is stamped on the motor end of the blade. That's your chainsaw bar length.
Don't have an Oregon chainsaw that easily shows you the length of the blade? Then here are some tips for figuring it out yourself.
What's The Best Way To Measure A Chain Saw Blade?
To measure the chainsaw blade itself is simple enough to do. Just put your measuring tape at the end of the bar up against the casing and measure straight down the bar all the way to the tip of the blade.
Blade and bar are two terms that are both used to indicate the same item. This is the blade that extends from the casing of the motor and carries the chain which is what does the sawing for you.
Manufacturers were kind enough to standardize the chainsaw blade lengths into two-inch increments. The most common sizes are 16, 18, and 20 inches although the full range goes from 10 to 42 inches! When you measure your blade, round up to the nearest 2-inch measurement if needed.
Measuring A Chainsaw Chain
To measure the chain on your chainsaw, there are two things you will need to know ... the number of drive links and the pitch of the chain.
A drive link is simply a tooth on the chain and your chain's length is determined by the number of drive links (or teeth). The pitch of the chain also affects the size of the drive links.
The pitch of the chain is important to know as it must match the pitch of both the drive sprocket as well as the bar nose sprocket. This should be stamped on the drive link but if you need to measure the pitch yourself, take the distance between any 3 rivets of the chain and divide by 2.
As an example, a 1/4" pitch chain might have 52 drive links and be 2.17 feet in length, while a 3/8" pitch with 52 drive links would be 3.18 feet in length. So the pitch affects the drive link size which affects your blade's length.
Still unsure? Just check with your chain saw's manufacturer or anyone who makes chains and they will be able to clear up any confusion you may have.
