Roller chain sprocket to reduce the string pitch additionally

摘要

Sprocket (112), "production condition" sometimes is defined to include an additional chordal pitch reduction ie when new. The sprocket chordal pitch P _S ', as compared with the chain pitch P _C of the assembled state (ie, the maximum sprocket chordal pitch theoretical) to the amount that has been selected is called "additional chordal pitch reduction" only is reduced intentionally have. This chordal pitch reduction that have been added will be added to the chordal pitch reduction inherent due to tolerance at the time of manufacture. For roller chain related, in order to facilitate the extension of the time interval meshing sprocket subjected to additional chordal pitch reduction (112) is highly desirable. Sprocket (112) is formed to have a chordal pitch which is reduced to about 1% to about 0.2% of the maximum sprocket chordal pitch theoretical maximum sprocket chordal pitch theoretical (ie, chain link pitch) from .