Idlers are included in belt drives for a variety of reasons (e.g. to apply the proper pre-tension or increase the belt wrap angle on a pulley). In the past, the Gates idler product line consisted of idler sprockets, brackets, and idler bushings. However, Gates recently introduced flat idler pulleys to give designers additional flexibility.
The flat idler pulleys can be used with the existing idler brackets and they are available in a range of sizes for use on both synchronous and V-belt drives. Available sizes and technical details regarding Gates idler product line are available at www.gates.com/idlers/.