Electrical switching & drive systems & components


Cam clutches for bulk handling

First Quarter 2020 Electrical switching & drive systems & components

New to BMG’s extensive range of Tsubaki cam clutches is the BS-F series, designed for high speed inclined and long overland belt conveyors and bucket elevators used in the mining and bulk handling sectors. Tsubaki backstop cam clutches are designed to prevent reverse rotation of drive shafts, offering a simple and cost-effective means to protect capital equipment and enhance safety. The new high-torque, high-speed Tsubaki BS-F series, with a narrow width I-beam torque

arm, is a drop-in replacement for conventional anti-rollback devices. This allows for quick and easy on-site installation.

Important features include a non-rollover cam and roller design, which offers higher backstop torque capacities and lower running temperatures than conventional anti-rollback devices. A flexible labyrinth seal mechanism prevents the ingress of dust and water in abrasive conditions and the double lip oil seal and multi-temperature grease enable safe operation at a wide ambient temperature range, from -40 to 65°C.

The cam and roller cage orbit at low speed, continually conveying grease internally from the bottom to the top of the mechanism. The constant circulation of grease minimises internal friction and reduces operating temperature for dependable operation. Maintenance intervals are between 7500 and 8000 hours.

Apart from the mining sector, BMG’s cam clutches are used for belt conveyors for materials handling, metals, timber, pulp and wood chip, as well as for bucket elevators for cement and grain. These units are also installed to enhance performance of large drift conveyors and screw pumps.


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