How big or how small can a custom timing belt be made?
Direct answer: Almost any production size is possible. Endless moulded rubber timing belts typically range from about 100 mm to roughly 4,000 mm pitch length depending on the profile, and longer lengths can be made from open-ended material joined by vulcanizing. Widths typically run from about 10 mm to 200 mm and beyond, limited mainly by the tooling available for each pitch.
Typical size windows by dimension
| Dimension | Typical range | What limits it |
|---|---|---|
| Pitch length (endless, moulded) | About 100 mm to 4,000 mm, longer profiles allow longer belts | Mould circumference and mould availability for that pitch |
| Longer lengths | Beyond 4 m via open-ended material with a vulcanized joint | Joint strength is somewhat lower than a moulded endless belt |
| Belt width | About 10 mm to 200 mm and beyond on common pitches | Mould width and cord tension uniformity across wide belts |
| Tooth count | Any count matching the pitch length for that profile | Nothing else, the count follows from pitch and length |
What decides feasibility for your size
Tooling
Each pitch needs a mould. Common pitches such as 3M, 5M, 8M, 14M, S8M, T10, AT10, XL and L are usually available, so a non-standard length in a standard pitch is often no problem.
Cord construction
Very short belts bend the cord harder; very wide belts need uniform cord tension. Both are solvable, but they set the practical limits.
Quantity
A one-off size can share an existing mould when the tooth count fits. Where a new mould is needed, the quantity decides whether it is economical.
Send these details for a fast feasibility check
- Pitch and profile, for example HTD 8M, or the belt code from the old belt.
- Pitch length or tooth count, plus belt width.
- Whether the belt must be truly endless or a vulcanized joint is acceptable.
- Cord preference if known, for example glass fibre, aramid or steel.
- Quantity per order and expected annual volume.
Not sure whether your size is feasible?
Email the belt code or the dimensions to sales@goodlybelts.com, or use the enquiry form. We will confirm feasibility, any tooling requirement and an indicative lead time before quoting.
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