Chain length accuracy should be measured according to the following requirements
A. The chain is cleaned before measurement
B. Wrap the chain under test around the two sprockets. The upper and lower sides of the chain under test should be supported.
C. The chain before measurement should stay for 1 minute under the condition of applying one-third of the minimum ultimate tensile load.
D. When measuring, apply the specified measurement load on the chain to tension the upper and lower chains. The chain and sprocket should ensure normal meshing.
E. Measure the center distance between the two sprockets
Measuring chain elongation
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 rollers of the number of sections to find the judgment size 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 in the previous paragraph.
Chain elongation = Judgment size – reference length / reference length * 100%
Reference length = chain pitch * number of links
Post time: Jan-12-2024