HOW TO ORDER
BR-HT SERIES CAM CLUTCH
BR-HT is mainly used in backstop applications as an integral part of a gear reducer. Prevention of reverse rota- tion for inclined conveyor and bucket elevator are typical application examples. BR-HT assures not only the immediate backstop function under high torque, but also long service life by the “lift-off” design. In addition, installation on the high speed shaft with low torque enables selection of more compact models with resulting lower cost.
Example How To Order Code: BR-HT Series Cam Clutch
BR 40 HT - R66B - 35
Series
Size
Descriptor
-
Cross
-
Bore
35: 35 mm bore diameter
R66B: Provides interchange information plus description of the cam cage width The "B" is an internal Tsubaki designator for the width of the cam
40: Size of the Cam Clutch
BR: High speed overrunning backstop clutch
HT: Descriptor for high torque capacity
For each size within a given BR Series
-
-
BR-HT Series has sizes available from 15 thru 300
Cam Clutch, multiple bore diameters are available
Service Life of BR-HT Series The service life of previous TSUBAKI Cam Clutch models was determined as the frictional service life during free- running (when the clutch was disengaged) and the fatigue service life of the engaged clutch. However, with BR-HT Series, 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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