Conveyor HiSafe systems - holdbacks and pulley guards

By ensuring your conveyor only operates in the desired direction, the New Torque-Master™ Holdback plays a critical role in the safety of your operations. Its reliable non-rollover cam operation prevents reverse runaways of loaded conveyors - effectively protecting against personal injury, flooded feed points, and damaged equipment.

The new backstop model is based on a proven Cam Clutch design that has been deployed at hundreds of sites around the world. The series can meet the high speed trend of inclined conveyors as well as it is a easy replacement from customer’s current backstop.

Material properties

The production facility for Metso holdbacks is quality-controlled and all products are thoroughly tested prior to shipment, ensuring they meet the engineered standard for strength and functionality.

With the special flexible labyrinth (Patent pending) seal mechanism for dusty and tough environment, water and dust are effectively blocked.

Special features

Available in torque ratings from 6760 to 980000 N-m, the Torque-Master™ holdback meets safe load ratings for most inclined belt conveyors, bucket elevators, and similar bulk material-handling applications.

Thanks to a simple enclosed design, it is suitable for use in all kinds of environments and relatively insensitive to contamination and wear.

The holdback can be mounted in any position and, if necessary, can be rebuilt in the field using stock parts. Special double-lip oil seal and multi-temperature grease for wide temperature range.

At the point where the belt meets the roller, there is always a risk of operators or anyone else in the area accidentally getting their fingers or clothes trapped, and potentially suffering serious injuries. Although unlikely, it is also possible that a rock or stone can fall and become trapped between the belt and pulley, causing serious damage to both.

Both these issues can be avoided quite simply, by blocking the danger zone with a polyurethane foam barrier, or head pulley guard. Positioned with a 5 mm gap on either side, the guard is not in contact with the belt, but the remaining gap is too small for fingers to get trapped.

Material properties

Made of polyurethane foam, the guard is gentle on the belt in the event of contact. Polyurethane is more suitable than rubber for this purpose, since it is low friction and therefore does not generate the kind of heat that would wear the belt out over time.

Special features

Available for different belt widths, this is a standard item and therefore always available in stock. It is easy and convenient to install and can be adapted to fit different pulley lengths or site-specific conditions. What’s more, it does not need to be removed during normal conveyor maintenance, which saves time and effort.

At the point where the belt meets the tail pulley, there is always a risk of operators or anyone else in the area accidentally getting their fingers or clothes trapped, and potentially suffering serious injuries. It is also possible that stones and debris can become wedged between the belt and pulley, causing serious damage to both. These issues can be avoided quite simply, by blocking the danger zone with a V-shaped polyethylene barrier, or tail pulley guard (TPG).

Material properties

The guard is in contact with the belt, but being made of low friction polyethylene, it doesn’t generate heat and is therefore gentle on the belt.

Special features

Although its primary purpose is to prevent operators’ fingers getting injured, the V-shaped TPG also deflects stones like a material plow. It thus extends belt lifespan and minimizes the risk of costly downtime.

Available for different belt widths, this is a standard item and therefore always available in stock. It is easy and convenient to install and can be adapted to fit different pulley lengths or site specific conditions.