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. GRAND C-MAX (DXA/CB7, DXA/CEU)
2. GALAXY (WA6)
3. S-MAX (WA6)
4. MONDEO IV (BA7)
5. MONDEO IV Turnier (BA7)
6. FOCUS III Saloon
7. FOCUS III
8. FOCUS III Turnier
9. 208 I (CA_, CC_)
10. FIESTA VI (CB1, CCN)
11. FIESTA VI Van
12. DS3
13. 207 (WA_, WC_)
14. 207/207+ (WA_, WC_)
15. 207 Hatchback Van (WA_, WC_)
16. C3 II (SC_)
17. 206+ (2L_, 2M_)
18. ECOSPORT
19. ECOSPORT SUV
20. TOURNEO CONNECT / GRAND TOURNEO CONNECT V408 MPV
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.