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Warner Electric EM210/ERS 68 Brake for Bucket Conveyor
A conveyor OEM was looking for a reliable braking solution for a bucket conveyor unit being built
for a West Coast dry food manufacturer. Bucket conveyors feature a chain drive containing a
series of buckets that pick up material on one side, transport it vertically, and deposit it at another
level. Therefore, all of the load is on the ascending side of the system, creating an inherently
unbalanced load. As a result, designers typically include backstops to prevent back driving in
case of a power loss to the drivetrain. However, some systems need to be able to address
material build up or, as in this case, to remove and clean the buckets for sanitation purposes.
In an empty system as buckets are removed, an unbalance is eventually created on the
descending side of the system, which could allow the conveyor to accelerate in the direction
of drive. Since the backstop freewheels in the direction of drive, it cannot restrain the forwardmoving
drive. Therefore, a brake is needed to hold the system safely in the direction of drive during
the cleaning process.
Working closely with the OEM, Warner Electric engineers defined the correct amount of torque
needed for the application. They determined that an EM210/ERS 68 spring-set/electricallyreleased
brake could be located between the 5 HP 215TC frame motor and reducer that would
exceed the load-holding requirement. By positioning the brake on the input side of the reducer, the
ratio of the gearbox multiplies the brake force, allowing for a smaller and simpler brake than would
be needed if the unit were mounted on the slow-speed side of the gearbox.
The brake is powered (dis-engaged) when the motor is on and engaged whenever the motor is off
and the power is turned off at the brake. This functionality allows the operators to jog the system
forward to access and remove buckets in a safe manner.
- NEMA C-Faced
- Max. holding torque:
100 lb.ft. (135.5 Nm)
- Max. speed rating of
- Compact packaged
- Completely assembled
- High torque, lead-free
- Easy to install