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. MEGANE III Hatchback (BZ0/1_, B3_)
2. DUSTER (HS_)
3. SCENIC III (JZ0/1_)
4. GRAND SCENIC III (JZ0/1_)
5. KANGOO BE BOP (KW0/1_)
6. NV200 / EVALIA Bus
7. EVALIA Bus
8. NV200 Bus
9. NV200 Van
10. KANGOO Express (FW0/1_)
11. KANGOO Rapid (FW0/1_)
12. KANGOO / GRAND KANGOO (KW0/1_)
13. KANGOO (KW0/1_)
14. CLA Coupe (C117)
15. LODGY (JS_)
16. MEGANE III Coupe (DZ0/1_)
17. MEGANE III Grandtour (KZ0/1)
18. GRAN TOUR III Grandtour (KZ0/1)
19. FLUENCE (L3_)
20. JUKE (F15)
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.