Many PU timing-belt requests fail to separate profile from supply form. A buyer may know the pitch and width, but the real project question is whether the belt should stay open-end, become welded endless, or move into a truly endless manufactured form.
Open-end belts often make sense where fabrication, custom length, guides, cleats, or integrator flexibility are central. Endless belts become more relevant when installation logic, running stability, or finished-loop performance matters more than field-adjustable length.
The choice also affects price and lead time. Two requests with the same pitch family can become very different commercial projects once welding, coatings, guides, or true endless production are involved.
For RFQ, buyers should state the current supply form, installation method, pulley arrangement, and any surface fabrication already required. Without that, discussions on PU timing belts stay too abstract to produce a strong recommendation.
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