The INA chain drive idler gear tooth unit is the guiding and rotating unit for roller sleeve chains and roller chains. They can compensate for the elongation of the chain during operation, making the system run more smoothly at high speeds and heavy loads.

The chain drive idler gear tooth unit is a ready to use unit consisting of a sprocket and a deep groove ball bearing. The sprocket is made of high-strength steel, sintered iron, or plastic (polyamide). The sprocket made of plastic runs smoothly and produces very little noise. Due to the extension of the inner ring on both sides of the deep groove ball bearing, no additional spacer is required.

In the KSR series In B0, the inner ring is fixed to the shaft through a locking ring. The bearing bore of this series has a positive tolerance. Therefore, Unprocessed shafts with ISO. h9 tolerances or below can be used for medium loads and medium speeds.