How Do You Measure A Chainsaw Chain
Olivia Luz

The other measurement you need is the full length of the bar.
This will give you how long the bar should be. To find the called length of your chainsaw bar measure it from its front tip all the way back to the cutter closest to the body of the saw. The most common pitch measurements you ll find on a chainsaw chain are 3 8 inch 0 95 cm and 325 inches 0 83 cm. You are measuring the bar from side to side.
Ideally the measurement you get should range between 12 and 20 inches. Round this measurement up to the nearest even number in inches. Drive links are the triangular extensions on the underside of the chain that keep it attached to the bar. To get this measurement line up your tape measure with the edge of the bar.
When you are measuring the chainsaw bar it is actually easy. Usually the first number the one in fractions refers to the pitch then the number of the driver links and finally the size of the gauge measured in inches. Also another way to measure the chain length for a chainsawis to start measuring the four elements on a chain. Measure from where the bar connects to the chainsaw casing to the furthest tooth of the chainsaw nose.
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Or if you are unsure about the real length you can take it off and take the bar to the hardware store for replacement. You then could look for a new bar with a 20 bar length. For example a bar that measures 18 3 4 will actually have a called length of 20.Source : pinterest.com