REDwire Tensioning rollers from Rosta keep all types of belt drives running smoothly

{{1482250947209| date:'MMM d, yyyy hh:mm a'}}    REDWIRE is news you can use from leading suppliers. Powered by FRASERS.

Rosta tensioning rollers come in various sizes and types to suit the application.

Rosta is a leader in the development and manufacturing of components for maintenance-free tensioning of belts and chain drives. These solutions eliminate the need for periodic re-tensioning, as they compensate for lengthening over time and belt slip.

The company’s tensioning devices are available with a range of accessories to suit all types of belt and chain drives. They include sprocket wheels, chain riders and tensioning rollers.

Tensioning roller features

Rosta’s tensioning rollers feature high-quality PA 6 industrial plastic and two self-lubricating ball bearings. They are suitable for use in temperatures from -35 to 100 degrees C (for type R), and -35 to 80 degrees C (for type RL). Type R models are available in a range of sizes and are suitable for maximum speeds from 4,500 to 8,000 RPM. Type RL models, designed for light-duty drives, are suitable for maximum speeds up to 6,000 RPM.


Tensioning rollers can be used with all types of V-belts either on the belt back or inside the belt drive. There are just a few considerations to keep in mind depending on the type of installation. For example, when tensioning from inside of the drive, a deep-grooved pulley should be used on the tensioner to prevent excessive slack beating in extremely long centre distances. When using a tensioning roller on the belt back, the diameter of the roller should be at least 2/3 the diameter of the drive’s smallest pulley, and it should be at least 20 per cent wider than the belt set.

More Rosta solutions

Rosta supplies a range of suspension elements and machine components that help lower maintenance costs and increase productivity. For more information on Rosta solutions, visit the company’s website.


Rosta Inc

Posted by   Read more