Setup cost is diluted
The same drawing review, CAM program, fixture plan and first article check can support more parts, reducing fixed cost per piece.
Key Pricing Factors
CNC machining price is mainly affected by setup time, machining cycle time, material, tolerance, finish, inspection, packing and quantity.
Cycle time becomes the main driver
For larger batches, the quote depends more on actual machining cycle time, tool wear, material removal rate and secondary operations.
Quality control must be planned
Large batches need stable inspection frequency, first article checks, in-process control and final packing review to avoid repeated errors.
Sample vs Small Batch vs Large Batch
| 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. |
What to Send for a Clearer Price
- Share annual or repeat order quantity if available.
- Confirm whether fixture investment is acceptable for repeat production.
- Identify features that need 100% inspection versus sample inspection.
- Confirm material certificates, finish consistency and packing rules.
- Ask whether design changes are expected before committing to large batches.
Related Pages
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