Preventing Reverse Rotation

New to BMG’s 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.
Space saving and quick installation
“The new high-torque, high-speed Tsubaki BS-F series, with a narrow width I-beam torque arm, is a drop-in replacement to conventional anti rollback
devices. This allows for quick and easy on-site installation and enables the replacement of an old backstop with the new BS-F design, without
the need for modification to the existing layout,” says Gavin Kirstein, National Tsubaki Product Specialist, BMG.
“Although this series has a narrower width than other models, the downsized unit exceeds the requirements of high-speed inclined belt conveyors, with the benefits of space-saving and reduced
installation time.
“A common cause of conventional backstop failure is oil leakage. Tsubaki has eliminated this risk in the new BSF series by designing the backstop to operate with grease and a specially- designed labyrinth seal.
The absence of an oil level gauge creates a more reliable safety device,” continues Gavin.
Operates in any environment
Important features of this series include a non-rollover cam and roller design, which offers higher backstop torque capacities and lower running temperatures than conventional anti rollback devices. Added to
this, a flexible labyrinth seal mechanism prevents the ingress of dust and water in abrasive conditions and a double-lip oil seal and multi-temperature grease enable safe operation at a wide ambient temperature range, from – 40°C 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 7 500 hours and 8 000 hours and the effective service life of the units is also significantly extended compared
with conventional oil-filled units.
Gavin Kirstein
Tel:(011) 620 7558