How To Measure Chainsaw Bar Length. When measuring chain saw bar length, take the distance between the tip and the protruding point at the chainsaw’s casing using a tape measure. The first step toward measuring the length is by switching off the saw.
It takes substantial power to drive a chain on a longer, heavier bar through dense wood. This is the standard way of determining the measurement of a chainsaw bar. The effective cutting length is also known as the called length.
For example, a bar that measures 18 3/4 will actually have a called length of 20.
This measurement will be showing the actual size of the chainsaw bar. Once you open the case, you will have the bar exposed. Round this measurement to the nearest even number in inches. Measure from the tip of the bar, to the end of the bar where it meets the motor.