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Home » Industry News » Mining Sector News » BMG Tsubaki backstop cam clutches enhance safety to all sectors

BMG Tsubaki backstop cam clutches enhance safety to all sectors

BMG, which is committed to ensuring optimum safety standards in all sectors, encourages and assists customers to adhere to stringent safety legislation during bulk handling.
This initiative ensures that appropriate measures are taken to prevent roll back incidents, which might cause injury to workers during conveying operations.

BMG technical experts advise on the selection of the correct cam clutch for each application and assists with proper installation methods to ensure optimum performance and improved safety standards.

“Tsubaki back-stops and cam clutches – which have been developed and manufactured in Japan for high efficiency and optimum safety in high or low speed applications – meet the requirements of current legislation,” explains Carlo Beukes, business unit manager, BMG’s Power Transmission division.

“Local safety regulations require that the installation of incline conveyor belts must include the fitting and use of one or more devices to prevent run-back or run-on, to prevent injury by materials falling from a conveyor belt.

“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. 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.”

Tsubaki cam clutches are available from BMG in different capacities and styles designed to provide the best functional characteristics for three basic modes of operation – overrunning, indexing and backstopping.

The outer and inner races of these cam clutches are manufactured from high quality alloy steel, with high surface hardness and core toughness, to withstand operation in arduous conditions.

These races are precision ground, providing excellent concentricity and a special surface finish to obtain accurate cam rotation. Cams are manufactured from special selected high alloy steel, with a hardness option up to 2 500 Hv.

A key range in BMG’s portfolio of Tsubaki cam clutches, is the BS-F series, which is suitable for high-speed inclined and long overland belt conveyors and bucket elevators used in the mining and bulk handling sectors.

The high-torque, high-speed Tsubaki BS-F series, with a narrow width I-beam torque arm, is a drop-in replacement to conventional “roller ramp” devices. This allows for quick and easy on-site installation and enables effortless replacement of an old backstop with the new BS-F design, without the need for modification to the existing layout. 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.

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 – 55°C to + 150°C.

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