Rosta Tension arm SE-15

The blue one from Rosta. Tension arm/clamping element for mounting a chain tensioning wheel or a tensioning roller. Inside the square tube profile are four rubber elements that provide the arm its spring effect. There are several advantages to using a tension arm in connection with a chain or a belt drive: - The chain or belt is constantly kept tight and vibrations are prevented. - The tension arm absorbs extension and requires less maintenance. - Constant tensioning ensures a smoother operation. See link to datasheet.