A CNC sample is not expensive because the part is small. It is expensive because programming, setup, material preparation, inspection and communication are all concentrated into a very small quantity.
CNC machining price is mainly affected by setup time, machining cycle time, material, tolerance, finish, inspection, packing and quantity.
Even one prototype part needs drawing review, CAM programming, tool setup, material preparation, machining time, deburring and inspection. When quantity is one or two pieces, those fixed costs cannot be spread out.
First-time parts often have unclear tolerances, possible design changes, finish uncertainty or assembly questions. The supplier must spend more time reviewing manufacturability before production.
A sample is often used to validate fit and function, so critical dimensions may need careful inspection even when the quantity is very low.
| Quantity type | Typical purpose | Price behavior |
|---|---|---|
| Sample / prototype | Fit check, function test, design validation | Highest unit price because setup and review cost are spread across very few parts. |
| Small batch | Bridge production, equipment builds, repeat low-volume demand | Lower unit price than samples because setup is shared, while flexibility remains high. |
| Large batch | Stable drawings and repeat demand | Lower unit price is possible when cycle time, fixtures, material yield and inspection plan are stable. |
Send drawings and quantity tiers such as 1 pc, 10 pcs, 50 pcs and 200 pcs. XHR can review the machining process and quote based on practical production needs.