A SNR brand Tensioner Pulley, timing belt is a part of the timing belt drive, which serves to bypass the belt in a certain place or several places and is a freely rotating pulley of small diameter.

The composition of the roller is small: it is the roller mount, the internal rolling bearing with a protective oil seal, and the working body of the roller itself, which is in contact with the belt.

1. KAPPA (838_)
2. BRAVO I (182_)
3. MAREA (185_)
4. MAREA Weekend (185_)
5. COUPE (175_)
6. KAPPA SW (838_)
7. KAPPA Coupe (838_)
8. STILO Multi Wagon (192_)
9. LYBRA (839_)
10. LYBRA SW (839_)
11. STILO (192_)
12. THESIS (841_)
13. See more in applications

The principles of the timing belt tensioner work

Excessive tension leads to intensive wear of the timing parts - pulley bearings (water pump, generator, tensioner, etc.), the belt itself, and others. In addition, a tight belt stretches faster and shortens its service life. Too little preload is fraught with more serious problems - slipping of the belt along the toothed pulleys of the camshafts, which leads to a violation of the valve timing and deterioration of the entire engine.

Therefore, a tensioning device is introduced into the timing drive in the form of rollers of one design or another, which, during engine operation, maintain an optimal belt tension.