Do you know the knowledge of these chains?

First, the composition of the saw chain

The saw chain is composed of a left cutting tooth, a right cutting tooth, a middle guiding tooth (also called a driving tooth) connecting piece, and a rivet combination.

Second, the model of the saw chain, the size of the saw chain

The chain is represented by the Latin alphabet and the Arabic numerals. Due to the country of production and the manufacturer, the letters and numbers represent different meanings, but the pitches, the thickness of the middle teeth, the shape of the teeth, and the safety are indicated. , minus grinding and other characteristic symbols of variation.

The pitch is also the center distance between the incisors, the middle guide teeth and the two holes of the connecting piece. On the same type of saw chain, their pitches (pitch distances) are the same, and all are expressed in inch inches. The gauges we use are all metric and must be converted when measuring. 1 inch = 25.4 mm, if you want to calculate the metric size, multiply it by 25.4 and the size it represents. Example B3L, pitch: 25.4 × 0.404 mm; middle guide tooth thickness: 25.4 × 0.063 mm