Chain length accuracy should be measured as follows:
1. The chain is cleaned before measurement.
2. The chain to be tested is placed on the two sprocket wheels, and the upper and lower sides of the chain to be tested should be supported.
3. The chain before the measurement should stay for 1 min under the condition of applying one-third of the minimum ultimate tensile load.
4. When measuring, apply the specified measuring load on the chain so that the upper and lower chains are tensioned and the chain should ensure normal toothing.
5. Measure the center distance between the two sprocket wheels.
Measuring chain elongation:
1. In order to remove the clearance of the entire chain, it is necessary to apply a certain degree of pulling tension on the chain.
2. When measuring, in order to minimize the error, measure in the 6-10 section.
3. Measure the inner L1 and outer L2 dimensions between the rollers of the number of segments to obtain the judgment size L=(L1+L2)/2.
4. Find the elongation length of the chain. This value is in contrast to the use limit of the chain elongation of the previous item.
Chain structure: consists of inner and outer links. It is composed of five small parts: inner chain plate, outer chain plate, pin shaft, sleeve and roller. The advantages and disadvantages of the chain depend on the pin shaft and the sleeve.
