All Idler sprockets come complete with a fitted ball bearing. The ball bearings are sealed on both sides and thus maintenance-free. They are lubricated for life.
The wide inner ring allows an easy assembly without spacers. The ball bearing and sprocket are permanently joined by press-fit. The sprocket is made of steel with a strength of 490 – 600 N/mm².
The design of many chain drives requires a tensioning wheel. A chain tensioning wheel is ideal for solving tensioning problems if fitted on the slack side of the chain drive.