Suma Precision Machinery

Model

Bore Size

A

B

C
(h7)

D
(h7)

E

F

Mounting Holes

Pulloff Holes

H min

I

J

K

L

M max

Model

Chamfer

U

Oil Plug Position/Dia.

Weight
(kg)

Inertial Moment
GD2
(kgm2)

Model

Bore Size(H7)

Keyway

A

B

C(h7)

D

PCDE

F-G

weight(kg)

Capacities (Open Type)

ModelTorque Capacity (N·m)Inner Race Overrunning SpeedMax. Engagement(r/min)Min.(r/min)Max. (r/min)BR 20P3068803,600350BR 25P3848803,600350BR 30P6078803,600350BR 35P6867803,600300BR 40P9807203,600300BR 45P1,0786703,600280BR 50P1,7156103,600240BR 60P3,4794903,600200BR 70P4,7354803,600200BR 80P6,5174503,600190BR 90P8,5264203,000180BR100P14,2104602,500180BR130P20,3844202,200180BR150P33,9083701,300160BR180P33,9083701,800160BR190P41,1603401,800140BR220P51,0583301,800140BR240P62,0343101,800130

Installation and Usage
1. We recommend using shaft tolerances of h6 or h7 for
Cam Clutch installation.
2. Use a ISO R773 (DIN 6885.1) parallel key make sure
that the key does not move in the keyway. A loose key
will damage the Cam Clutch.
3. When installing the Cam Clutch over a shaft, please
follow the procedure outlined below. Never strike the
clutch with a steel hammer or apply unnecessary
impact loads.
1) Verify Cam Clutch direction of rotation. The arrow on
the inner race shows the free running (cam
disengaged) direction. Make sure that the direction of
cam engagement matches the intended application.
2) Tap the inner race lightly with a soft hammer moving
around the race circumference so the Cam Clutch
moves slowly and uniformly onto the end of the shaft.
Make sure that the outer race does not become
dislodged.
3) Place an end plate over the inner race and use the
mounting bolts to pull the Cam Clutch onto the shaft
as shown in the diagram at right.
4) Tighten the end plate securely.
4. If you are installing the outer race first, check the
precision of the fit. The tolerances for outer race
mounting are shown in the tables at right. Verify that the
correct tolerances can be obtained. Out of spec
installation could damage the Cam Clutch.
5. To lubricate the Cam Clutch, apply lubricant at the
outer circumference of the inner race (see installation
diagram). Avoid over lubrication, as it will cause the
Cam Clutch to generate excessive heat.
6. When using the Cam Clutch at a reduction gearbox,
make sure that oil from the gearbox cannot enter the
Cam Clutch. Service life can be significantly shortened
if the Cam Clutch comes in contact with gear oils that
contain viscosity enhancing additives. Refer to page 80
for lubrication guidelines.
7. When installing a cover or seal support over the outer
race, use bolts with a tensile rating of 10.9 or greater.
Use a sealing agent or packing material between the
mating services to prevent leakage.

Installation and Usage
1. We recommend using shaft tolerances of h6 or h7 for
Cam Clutch installation.
2. Use a ISO R773 (DIN 6885.1) parallel key. Make sure
that the key does not move in the keyway. A loose key
will damage the Cam Clutch.
3. When installing the Cam Clutch over a shaft, please
follow the procedure outlined below. Never hit the
clutch with a steel hammer or apply unnecessary
impact loads.
1) Verify the Cam Clutch direction of rotation. The
arrow on the inner race shows the free running (cam
disengaged) direction. Make sure that the direction
of cam engagement matches the intended
application.
2) Tap the inner race lightly with a soft hammer moving
around the race circumference so the Cam Clutch
moves slowly and uniformly onto the end of the
shaft. Make sure that the outer race does not
become dislodged.
3) Place an end plate over the inner race and use the
mounting bolts to pull the Cam Clutch onto the shaft
as shown in the diagram at right.
4) Tighten the end plate securely to make sure that the
Cam Clutch cannot move on the shaft.
4. If you using a torque arm, make sure that the bolts
used to mount the torque arm have a tensile strength
of 10.9 or greater, and tighten them securely.
5. Set a 2mm clearance between the torque arm and the
torque arm stopper. If the torque arm is rigidly
mounted, it will be applying a load to the Cam Clutch
which can eventually damage it.
6. Install an appropriate coupling if there is a chance that
the shaft will elongate from thermal expansion as
encountered in some exhaust fan auxiliary drive
system applications.
7. If thrust loads are encountered, install a thrust bearing
which will prevent those thrust loads from being
transferred to the Cam Clutch.
8. The Cam Clutch is pre-packed with grease before
shipment and is ready for installation and operation.
Refer to page 80 for lubrication guidelines.