How does the custom fan sample process work?

The process is six stages: specification review, candidate selection or custom design, sample build, validation on the customer's unit, design freeze, and volume production. The customer's validation stage is the load-bearing one — samples are proven in the real assembly at real duty, because that is the only test that predicts field behaviour. Neither side benefits from skipping it.

The six stages

(1) Specification review: your RFQ items are confirmed, gaps are closed, and the operating point is fixed in writing. (2) Selection or design: a standard frame matched to the point, or a custom variant (speed, bearing, sealing, connector, lead) is proposed with its data. (3) Sample build: first-article samples with the agreed interface, plus a data pack. (4) Validation on your unit: you run the qualification checklist — thermal result, signals, acoustics, mechanics — at worst-case duty. (5) Freeze: drawing, interface, and acceptance method locked with change control. (6) Production with the frozen record.

What makes it fast

Three things: a complete specification up front (see the RFQ checklist), fast feedback during sample evaluation (measured numbers beat impressions), and a frozen interface — teams that iterate the connector or control requirements mid-project restart the sample clock. Changes discovered during validation are normal and expected; the process exists to surface them before production, while they are still cheap.

• Freeze the operating point before samples, not after.
• Evaluate samples against the written checklist and return data, not adjectives.
• Lock connector and interface at freeze — they drive the longest lead items.