Backstops and one-way clutches prevent an inclined conveyor, bucket elevator or hoist from running backwards when the drive stops. The DT, DSN and NY series lock in the reverse direction while overrunning freely in the running direction, so a loaded belt or a full elevator cannot roll back and dump material into the tail end or damage the gearbox.
We select a backstop from the rated reverse torque, shaft bore and fit, and the mounting position — normally on the gearbox high-speed shaft, where the required holding torque is lower, or directly on the drive pulley shaft where space allows. The rated torque must cover the full static reverse load with a margin, not just the running torque, and the direction of rotation must be stated on the order because the unit is handed.
Units are supplied with the specified bore, keyway and torque arm arrangement, and the fit and rotation direction are checked before the order is released. Lubrication and sealing are matched to the site: dusty cement and mineral plants need better sealing than an indoor packaging line. Because a backstop is a safety component, we also confirm how it interfaces with the brake and the drive control.
Each unit is inspected and rotation-tested before packing. We commonly consolidate backstops with gearboxes, fluid couplings, couplings and conveyor chain into a single shipment, so the complete drive train arrives matched and ready to install. Lead time is confirmed against the configuration at quotation.
Send us the gearbox model or shaft drawing, the required reverse holding torque, rotation direction and mounting position. We will confirm the frame, bore and fit and return a complete selection with a quotation.
