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. 500 / 595 / 695 (312_)
2. 500 (312_)
3. 500C / 595C / 695C (312_)
4. PUNTO (199_)
5. BRAVO II (198_)
6. RITMO III (198_)
7. DOBLO MPV (263_)
8. DOBLO Kombi (263_)
9. DOBLO Combi (263_)
10. DOBLO Cargo (263_)
11. MITO (955_)
12. GIULIETTA (940_)
13. PUNTO (176_)
14. PUNTO Convertible (176_)
15. Y (840_)
16. DOBLO Platform/Chassis (263_)
17. PRATICO Platform/Chassis (263_)
18. GRANDE PUNTO (199_)
19. MUSA (350_)
20. INDICA VISTA
21. 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.