Belt Tension Pulleys

Idler pulley units are tensioning systems for belt drives and idler units:
 

• they increase the wrap angle in belt drives and can therefore support higher power levels or allow smaller units to be used
• they allow shorter centre distances
• they reduce the wear on the belt drive.

The ready-to-fit units comprise deep drawn, profiled sheet steel pulley halves riveted together and deep groove ball bearings. Pulleys of larger diameters are additionally welded together. A lead chamfer on the pulley profile prevents damage to the belt. Due to the sheet steel construction, the additional rotating masses and the unbalance masses generated are low.

Type A is suitable for vee belts, type B for flat, vee and round belts, type D for round belts, steel cables and hemp ropes.