A INA 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. RITMO (138A_)
4. STRADA (138A_)
5. REGATA (138_)
6. REGATA Saloon (138_)
7. REGATA Weekend (138_)
8. 131 (131_)
9. SUPERBRAVO (131_)
10. 131 Familiare/Panorama (131_)
11. ARGENTA (132_)
12. ARGENTA Saloon (132_)
13. PRISMA (831_)
14. RONDA (022A)
15. 132 (132_)
16. 132 Saloon (132_)
17. 131
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.