What is the length of the professional chainsaw chain18 August 2021
What is the length of the professional chainsaw chain?
Take the B3 professional chainsaw chain used in 18 inches as an example. The professional chainsaw chain used is riveted into a circular ring. There are 30 left and right incisors, and there are 4 pitches between each two incisors (the upper pitch of the incisors is also counted), 0.404×4× 30 = 48.48 (inches) 1 foot = 12 inches, the data obtained is divided by 12 inches, 48.48 ÷ 12 = 4.04 feet, the length of this professional chainsaw chain is 4.04 feet. (Multiply 2 for calculation with center guide tooth)
Each box of professional chainsaw chain is 100 feet long. Various models of professional chainsaw chain have different pitches, so the number of cutting teeth is different. There are 4 pitches of guide teeth in the connecting piece attached to each cutting tooth. The calculation formula and data are as follows:
Type A: 100 (feet)÷(0.375×4÷12)=800
Type B: 100 (feet) ÷ (0.404 × 4 ÷ 12) = generally 744 (tooth cutting)
Type K: 100 (feet) ÷ (0.325×4÷12) = generally 924 (tooth cutting)
Type N: 100 (feet) ÷ (0.365 × 4 ÷ 12) = generally 822 (tooth cutting)
Normal professional chainsaw chain, in order to prevent cutting deviation, should be left and right pairs, that is, symmetrical, and the number of cutting teeth is even. The 100 feet issued by the manufacturer is not just an integer, and some are a little more because the cutting teeth of the professional chainsaw chain given are even numbers. However, some guide plates are not standard. The professional chainsaw chain cutting teeth riveted must be odd numbers, with two left (or right) cutting teeth on one side, plus a connecting piece and a middle guide tooth. Then its total length is calculated by the middle guide teeth, and there are two pitches for every two middle guide teeth (the pitch on the middle guide teeth is also counted). Then its length is the pitch multiplied by 2, multiplied by the number of guide teeth, and then divided by 12. Take K-chain, the number of guide teeth is 59 as an example:
0.325×2×59÷12=3.196 feet. The calculation method of other professional chainsaw chain is the same, the difference is their pitch.
In addition, there are two data to remember: 1 foot = 12 inches, 1 inch = 25.4 mm
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