A SNR 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. PANDA (169_)
2. PANDA / PANDA CLASSIC (169_)
3. PUNTO EVO (199_)
4. GRANDE PUNTO (199_)
5. PUNTO (199_)
6. YPSILON (843_)
7. 500 (312_)
8. MUSA (350_)
9. PANDA Hatchback Van (169_)
10. IDEA (350_)
11. YPSILON (312_)
12. MITO (955_)
13. PUNTO Hatchback Van (199_)
14. PUNTO (188_)
15. PANDA (312_, 319_)
16. PUNTO Hatchback Van (188_)
17. DOBLO MPV (119_, 223_)
18. DOBLO Box Body/MPV (223_)
19. DOBLO MONOCAB (223_)
20. LINEA (323_, 110_)
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.