Problem this solves
Ordering the wrong length is the most common V-belt mistake. Use this guide to confirm Li, Lw, or La before quoting.
Measurement steps
- 1Find the belt markings and record the section and length code.
- 2If markings are missing, measure the belt with a flexible tape.
- 3Identify whether the length is Li (inside), Lw (pitch), or La (outside).
- 4Measure pulley diameters and center distance if the belt is missing.
Length references explained
| Reference | Description | Typical use |
|---|---|---|
| Li | Inside length | Classical belts |
| Lw | Pitch length | Wedge belts |
| La | Outside length | Legacy markings |
FAQ
- Q: Can I convert between Li and Lw? A: Yes, but conversion depends on belt section.
- Q: What if the belt is stretched? A: Use pulley and center distance to verify.
- Q: Do you need the belt width? A: Yes, share the section or width for matching.
If the belt code is missing, supply pulley diameter and center distance so we can calculate a safe replacement size.
Back to belt categories: unknown node or unknown node.