INA from Schaeffler Idler pulley units are tensioning systems for belt drives and idler units. 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 also 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 out of balance masses generated are low.
• Increase the wrap angle in belt drives and can therefore support higher power levels or allow smaller units to be used • Compensate for belt stretch resulting from operation
• Allow shorter centre distances
• Reduce the wear on the belt drive