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MR One Direction Backstop Cam Clutch
  • MR One Direction Backstop Cam Clutch

MR 750 MR 800 MR 900 MR 1000 MR Series One Way Cam Clutch Bearing Backstop

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Lift-off (Outer race rotation type)

MR Series Cam Clutch is structuredso that the cam rotates together withthe outer race when the outer raceoverruns. As shown in the figure, thespring force (Fs) works to make thecam come in contact with the innerand outer races with fixed pressure.Conversely, the eccentric force (Fc),which works on the cam whenoverrunning, applies a moment in thedirection where the cam does notcontact the inner and outer races.Accordingly, when the overrunningspeed is increased, the eccentricforce (Fc) increases and themovement is augmented over themovement caused by the springforce. Next, the cam lifts off from theinner race and loses contact with it.This phenomenon is called “lift-off.”In this state, there is no friction on thecam and it continues overrunning aslong as the bearing lasts.

 

Model Torque Capacity(N·m) Max.Overrunning(r/min) BoreSize A B(h7) C D E F S H-M No.of TappedHoles ×Size×Pitch Lubrication FillerPlug Size×Pitch Oil (mℓ) Weight(kg)
InnerRace OuterRace Dia.(H7) Keyway
MR 750 9500 525 2600 85 24x6 153 200 150 175 75 110 25 8xM14xP2.0 M8xP1.25 400 37
MR 800 17600 475 2100 110 28x7 158 250 155 220 77.5 140 25 8xM16xP2.0 M8xP1.25 500 46.5
MR 900 24500 400 1850 135 35x9 165 300 160 265 80 170 32 10xM16xP2.0 M8xP1.25 620 70.5
MR 1000 33800 325 1600 160 38x10 188 370 180 325 90 200 32 12xM16xP2.0 M8xP1.25 850 108.5

Installation and Usage

1. MR Series Cam Clutch is usedfor outer race overrun in highspeedapplications.

2. For attaching a pulley, a gear, ora sprocket to the clutch, insertthe clutch into the hub of thesaid device, and screw the bolts(high tension) into the tappedholes on the clutch. Thetolerance of the bore hub shouldbe H6 or H7 of ISO R773.

3. When mounting the clutch on ashaft, apply pressure to theclutch inner race, but never to

the outer race.

4. Allow for a clearance betweenthe top of the clutch keyway andthe top of the key forpressureventilation. A pressure ventilationhole is provided on the keywayof the clutch inner race.

5. When the clutch receives ashock load or is designed foruse at full torque capacity, it is

better to use it on anunannealed or hardened shaft.

6. Thrust load should be taken upby other devices, not by theCam Clutch.

7. MR Series Cam Clutch includesspecial keys (hardened) whichhave a special height

dimension. The depth of the keygroove for the shaft shouldcomply with ISO R773.

8. Forced lubrication isrecommended for continuousoperation.

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