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. 155 (167_)
2. RITMO (138_)
3. STRADA (138_)
4. TIPO (160_)
5. REGATA (138_)
6. REGATA Saloon (138_)
7. REGATA Weekend (138_)
8. UNO (146_)
9. PRISMA (831_)
10. DELTA I (831_)
11. DELTA � (831_)
12. THEMA (834_)
13. THEMA SW (834_)
14. DELTA II (836_)
15. DELTA Mk II (836_)
16. COUPE (175_)
17. DEDRA (835_)
18. DEDRA SW (835_)
19. KAPPA (838_)
20. RITMO Convertible (138_)
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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.