The 20-Part RFQ Is Not a Small Customer
About half of the machining RFQs we see ask for 20 parts or fewer. Some buyers apologize for the small quantity. They should not — most production orders in this industry start as a 10-piece validation run. A shop that treats your prototype like a nuisance is a shop that will not get your production run. We treat every small-batch RFQ as the first step of a longer relationship, and we ask about annual volume on the first reply.
What Realistic Prototype Lead Times Look Like
For a standard material in stock and a drawing that is clear, a CNC prototype in aluminum or steel is typically 5-7 working days including first-article inspection. Add 2-3 days per extra revision you want, and another few days if the material has to be ordered or heat treatment is involved. If someone quotes you two days, ask what they are skipping — usually the inspection.
| Scenario | Typical Lead Time | What Happens in That Time |
|---|---|---|
| Simple part, stock material, clear drawing | 5-7 working days | Programming, machining, CMM inspection, FAI report |
| With revision after review | +2-3 days | DFM feedback loop, drawing update, re-run |
| Heat treatment or anodizing required | +3-5 days | Outside process, hardness check, finish inspection |
| Material not in stock | +3-7 days | Material sourcing and incoming inspection |
MOQ: The Truth No One Wants to Hear
A CNC machine shop does not have a magic MOQ number. The real economics are about setup — programming, fixturing, first-article inspection — which is the same whether you order 1 piece or 500. That setup cost gets spread across the quantity. So the per-piece price on 5 pieces can be 5-10x the price on 500 pieces. That is not a shop being greedy; it is math.
The practical move: if you know the annual quantity, say so on the RFQ. We can price the prototype run and the production run together, and sometimes the prototype tooling and programs carry over, which cuts the production setup cost later. A part machined on the same fixtures for prototype and production is a part with a predictable cost curve.
Why DFM Review Pays for Itself on the First Batch
The prototype stage is the cheapest place to fix a design problem. We review every drawing before quoting — wall thickness, internal radii, thread depth, tolerance stack-ups — and flag what will be slow or risky to machine. Fixing a 1 mm wall that warps during machining costs nothing on paper and saves a scrapped production run. On every quote we return DFM notes for free; use them.
Planning the Jump to Production
When the prototype passes validation, the jump to production is fastest if three things are already decided: the material spec is frozen, the critical tolerances are marked with datums, and the annual quantity is shared. With those, production lead time for machined parts typically runs 2-4 weeks depending on quantity, and we can lock a fixed price per piece plus a delivery schedule instead of quoting every batch from scratch.
Send us your prototype drawing with the annual quantity noted, and you will get one quote covering both stages — prototype now, production later — with the same program and fixture base.
What Slows a Prototype Down
Three things push prototype lead time out more than anything else: material availability, DFM back-and-forth, and finishing queues. If the material is on our shelf, the clock runs fast. If it has to be ordered, add a week. If the drawing has a risky feature — a thin wall, a deep pocket, an unthreadable depth — we flag it instead of quietly machining it, and the fix usually takes one quick reply. None of that is bad news; it is just how a shop protects your part. Tell us your target date on the RFQ and we will tell you honestly what fits and what does not.
Frequently Asked Questions
What is a typical CNC prototype lead time?
5-7 working days for standard materials and clear drawings, including first-article inspection. Heat treatment, special materials or multiple revisions add time.
Do CNC shops have a minimum order quantity?
No fixed MOQ — setup cost is spread across the quantity, so small batches cost more per piece. Share your annual volume and we can price prototype and production together.
Why is the per-piece price so high for 10 parts?
Programming, fixturing and first-article inspection cost the same for 1 or 500 pieces. On 10 pieces that fixed cost is divided by 10; on 500 by 500.
Can prototype tooling be reused for production?
Yes. If the design does not change much, the programs and fixtures carry over, which cuts production setup cost and shortens the lead time to the second batch.
Is DFM review really free?
On our side, yes — every quote includes DFM notes. It protects you from costly redesigns and us from scrapped parts, so there is no reason to charge for it.