A OPTIMAL 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. TIPO (160_)
2. PRISMA (831_)
3. DELTA I (831_)
4. DELTA � (831_)
5. THEMA (834_)
6. THEMA SW (834_)
7. DEDRA (835_)
8. DELTA II (836_)
9. DELTA Mk II (836_)
10. CROMA (154_)
11. TEMPRA (159_)
12. TEMPRA S.W. (159_)
13. TEMPRA SW (159_)
14. DEDRA SW (835_)
15. 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.