LIFE OF BREU/BR-HT/BRUS SERIES CAM CLUTCH The service life of previous TSUBAKI Cam Clutch was determined as the frictional service life during free-running (clutch disengaged) and the fatigue service life of the engaged clutch. However, with the BR Series, free-running frictional service life is not a factor because there is no mechanical contact when the clutch is disengaged. As a result, service life is determined solely by the fatigue life of the engaged clutch.
Non-contact range
Contact time Free-running time
0
(a) Contact time
Non-contact time
(b) Contact time
Friction in the clutch mechanism only occurs during a very short period of time denoted by “a” and “b”. “a” is the time during which the cam is engaged until the acceleration of inner race causes it to disengage. “b” is the time during which the cam engages when the inner race decelerates.
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