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. RITMO (138_)
2. STRADA (138_)
3. REGATA (138_)
4. REGATA Saloon (138_)
5. REGATA Weekend (138_)
6. 131 (131_)
7. SUPERBRAVO (131_)
8. 131 Familiare/Panorama (131_)
9. X 1/9 (128_)
10. UNO (146_)
11. PRISMA (831_)
12. DELTA I (831_)
13. DELTA � (831_)
14. RITMO Convertible (138_)
15. STRADA Convertible (138_)
16. ARGENTA (132_)
17. ARGENTA Saloon (132_)
18. 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.