Chain tensioner sprockets

Tensioner sprockets are sprockets with a bearing and a fixing bolt that are mounted on a tensioner arm. They rotate freely together with the chain and press against its slack side, maintaining constant tension.

Chain tensioner sprockets - complete with bearing and bolt for the arm

You receive the sprocket complete - with a bearing and a bolt matched to the arm, so mounting comes down to bolting it on. A rolling sprocket does not rub against the chain, which is why it also works well at higher speeds, where a slide would wear too quickly. The bearing in the sprocket ensures light and quiet rotation.

Idler sprockets for B series chains: simplex, duplex and triplex

Sprockets for European B series chains in simplex, duplex and triplex versions. The chain size and the designation of the arm that the sprocket bolt fits are given in the product name. Arms can be found in the neighbouring Tensioner arms group.

Questions and answers: how to choose a chain tensioner sprocket

How do I choose a tensioner sprocket?

According to the chain, e.g. 08B-1, and the arm on which the sprocket will work - the sprocket bolt must fit the hole in the arm.