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. B-SERIE (UN)
2. B-SERIE BRAVO Pickup (UN)
3. PROCEED (UN)
4. B-SERIE SUV (UN)
5. BOUNTY (UN)
6. PROCEED / DRIFTER (UN)
7. RANGER (ER, EQ, R_)
8. RANGER (TU_, ER, EQ, R_)
9. RANGER SUV (ER, EQ, R_)
10. B-SERIE (UF)
11. B-SERIE BRAVO Pickup (UF)
12. B-SERIE SUV (UF)
13. PROCEED/DRIFTER (UF)
14. LANCER VII (CS_A, CT_A)
15. LANCER VII (CS_A, CG, CH, CJ, CT_A)
16. CEDIA VII (CS_A, CT_A)
17. LANCER VII Estate (CS_W, CT_W)
18. LANCER VII Estate (CS_W, CT_W, CH)
19. 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.