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. H-1 / STAREX Bus (A1)
2. H200 Bus (A1)
3. SATELLITE Bus (A1)
4. STAREX I Bus (A1)
5. STAREX Bus (A1)
6. SONATA IV (EF)
7. SONATA IV Saloon (EF)
8. SONATA Mk III (EF)
9. SONICA IV (EF)
10. H-1 Van (A1)
11. H200 Van (A1)
12. STAREX Van (A1)
13. STAREX I Van (A1)
14. LIBERO Van (A1)
15. TRAJET (FO)
16. HIGHWAY VAN
17. SANTA FE I (SM)
18. MAGENTIS (GD, MS)
19. OPTIMA Saloon (GD, MS)
20. OPTIMA / MAGENTIS (GD, MS)
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.