What are the inspection methods for transmission chains?

1. Appearance inspection
1) Check whether the inner/outer chain pieces are deformed, cracked, or corroded.
2) Whether the pin is deformed, rotated, or corroded.
3) Whether the roller is cracked, damaged or excessively worn.
4) Whether the joint is loose and deformed.
5) Is there any abnormal sound or abnormal vibration during operation? Is the chain lubrication condition in good condition?
2. Accuracy check
1) The chain must be cleaned before measurement.
2) Wrap the chain under test around the two sprockets, and the upper and lower sides of the chain under test should be supported.
3) The chain before measurement should stay for 1 minute with one-third of the minimum ultimate tensile load applied.
4) When measuring, apply the specified measurement load on the chain to tighten the upper and lower chains, and ensure normal meshing between the chain and the sprocket.
5) Measure the center distance between the two sprockets.
3. Chain elongation inspection
1) In order to remove the play of the entire chain, it is necessary to measure with a certain degree of pulling tension on the chain.
2) When measuring, in order to minimize the error, measure at sections 6-10 (link).
3) Measure the inner L1 and outer L2 dimensions between the number of rollers to find the judgment dimension L=(L1+L2)/2.
4) Find the elongation length of the chain. This value is compared with the usage limit value of the chain elongation mentioned in the previous paragraph.
The elongation of the chain = judgment size - reference length / reference length * 100%.
Base length = chain pitch * number of links.