ISUTAMI sprocket idler, also known as transmission sprocket idler or roller sprocket idler. Gears that primarily utilize their inertia in mechanical equipment are collectively referred to as idlers. In the gear train, if a gear is both the driven wheel of the previous stage drive and the drive wheel of the latter stage drive, this gear is called the idler. The idler is also called the bridge gear. The number of teeth does not affect the magnitude of the gear ratio, but it will affect the steering of the latter gear. The main role of the idler is to change the steering of the driven wheel, increase the transmission distance, adjust the pressure angle and so on. The idler is a transitional gear train part that does not change the transmission relationship, in order to make the wheel train more reasonable or to meet the entire transmission system arrangement. Its function is only to change the veer, and can not change the gear ratio. The wheel base can be extended by the idler. The number of teeth has no effect on the gear ratio, but it will affect the veer of the latter wheel. The idler is a wheel that does not work. It has a certain energy storage function and is helpful for system stability. Idlers are very common in machinery and help to connect distant shafts.The idler is used in a transmission machine, usually with its inner ring fixed to the shaft and a ball bearing inside the wheel.