BR-HT SERIES BR-HT is mainly used in backstop applications as an integral part of a gear reducer. Prevention of reverse rotation for inclined conveyors and bucket elevators 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. CLUTCHES & BACKSTOPS
MZEU/BREU CAM CLUTCH AVAILABLE MODULAR COMPONENTS CLUTCHES & BACKSTOPS
Please refer to Tsubaki’s Cam Clutch Catalog for more information on BR-HT part numbering. Available for download at www.ustsubaki.com/technical-resources.html
Basic type with outer keyway
E3 torque arm + E4 cover
E5 flange + E5 flange
E2 flange + E7 flange
Basic type
E1 flange + E2 flange
E2 flange + E3 torque arm
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
MZEU SERIES MZEU Series is a general purpose Cam Clutch suitable for a wide variety of applications. A selection of add-on flanges and torque arms are available enabling this Cam Clutch to easily fit where custom designed products were previously required. MZEU12 to MZEU80 are pre-greased, requiring no Lubrication.
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.
Specifications
Bore Size (mm)
Torque Capacity (lbs-ft)
Bore Size (mm)
Torque Capacity (lbs-ft)
Model
Model
The BRUS Series backstops are designed for use in external high-speed backstopping applications. The BRUS is drop-in-ready and has a unique torque arm design that allows for backstop or torque arm replacement only during maintenance. BRUS series backstops ship pre-lubricated with grease. BRUS SERIES BACKSTOPS
MZEU12 MZEU15 MZEU20 MZEU25 MZEU30 MZEU35 MZEU40 MZEU45 MZEU50
MZEU55 MZEU60 MZEU70 MZEU80 MZEU90 MZEU100 MZEU130 MZEU150
12 15 20 25 30 35 40 45 50
44 74
55 60 70 80 90
1770 2176 3105 3813 8851
181 313 542 749 996
100 130 150
12981 18070 24930
1195 1527
Specifications
The BREU Series Cam Clutch is commonly used in backstopping applications that require higher speed inner race overrunning, and low to medium speed engagement speed capability. The BREU Series Cam Clutch is popular amongst both OEM’s and end users, utilizing a broad array of mounting accessories and the ability to select keyway positions on the inner and outer race to offer mounting flexibility. BREU Series incorporates a “lift off” style cam which provides increased Cam Clutch life. BREU SERIES
Specifications
Inner Race Overrunning (r/min)
Model
Torque Capacity Inner Diameter Range (in)
Inner Race Overrunning Engagement Min RPM Max RPM Max RPM
Bore Size (mm)
Torque Capacity (lbs-ft)
Model
lb. ft.
(Nm)
Min. 400 400
Max. 3600 2400 1800
BRUS45 BRUS60 BRUS90
700 (950)
6.5 - 0.98
BREU30 BREU35 BREU40 BREU45 BREU50 BREU55 BREU60 BREU70 BREU80 BREU90 BREU100 BREU130 BREU150
30 35 40 45 50 55 60 70 80 90
448 506 723 795
880 780 720 670 610 580 490 480 450 420 460 420 370
3600 3600 3600 3600 3600 3600 3600 3600 3600 3000 2500 2200 1300
350 300 300 280 240 220 200 200 190 180 180 180 180
1770 (2400) 4420 (6000)
8.58 - 1.26 11.65 - 1.50
400
1265 1446 2566 3492 4807 6288
BRUS Series Installation
100 130 150
10481 15034 25009
229
230
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