The difference between 18 inch and 20 inch chainsaw chain

Saw chain parameters mainly include pitch, thickness of intermediate guide teeth, and shape of cutter teeth.

1. Pitch: The pitch of the saw chain is the distance of 3 rivets divided by 2; it corresponds to the pitch of the sprocket. Including 1/4, 0.325, small 3/8, large 3/8, 0.404 (in inches; 1 inch = 25.4mm).

2. Thickness of the middle guide tooth: corresponding to the width of the guide groove of the guide plate. Includes 0.043, 0.050, 0.058, 0.063 (in inches; 1 inch = 25.4mm).

3. Tooth shape: Determines the smoothness of the cut wood. Including rounded corners, right angles, and arcs.