Axlevara · category range
Tensioners and idler pulleys for belt drives
Belt-drive tensioners, guide wheels and idler wheels supplied by cross-reference: tensioner line and tension pulley line ranged separately. 189 catalogue listings.
- Range
- Belt-drive tensioners and idlers
- Catalogue
- 189 listings in the published catalogue
- Reference
- Tensioner line and pulley line split
Two jobs on the same belt
A tensioner holds belt tension as the belt stretches and wears; an idler — the guide wheel — routes the belt around the drive. Both spin on bearings, both fail by bearing wear, and both are ordered from the same shelf, which is why the catalogue ranges them as one family of 189 listings with two distinct lines inside it.
The split matters for ordering: the catalogue counts the tensioner line and the tension pulley line separately, and a request for 'a pulley' can mean either. The two series pages keep the lines apart.
Tensioner or idler: the contrast
A tensioner is mounted on a spring or an adjuster and moves; an idler is fixed and only guides. The SERP contrast the trade uses is the workshop contrast too: if the part applies the tension, it is a tensioner; if it only changes the belt's direction, it is an idler.
| Point | Tensioner | Idler pulley |
|---|---|---|
| Function | Applies and holds belt tension | Guides the belt path |
| Mounting | Spring-loaded or adjustable | Fixed bracket |
| Catalogue line | Tensioner line | Tension pulley line |
| Series page | Belt tensioners | Idler pulleys |
Ordering from this family
Quote the cross-reference or the engine application, and state whether the part tensions or guides. Serpentine belt tensioners and drive belt idler pulleys are the common application wordings, and both are matched against this family's two lines.
The timing shelf connection
Belt-drive tensioners are also the neighbours of the timing families: a timing belt kit job handles the timing-side pulleys inside the kit, while this family covers the accessory belt drive. Orders often span both, and they are quoted together.
The two lines in this family
Belt Tensioners
The tensioner line
Idler Pulleys
The tension pulley line