The same part can cost differently — depending on whether you order one piece, fifty, or five thousand. CNC machining covers the whole spectrum: from prototype to production series. We explain how these modes differ and why batch size has such a strong impact on the unit price.
One-off production
Single pieces: prototypes, spare parts, parts no longer available on the market. All the set-up work — drawing analysis, CNC program, tooling — falls on a single part, so the unit price is the highest. That is natural for one piece.
Small-series production
From a few to several dozen pieces. The set-up cost is now spread across the whole batch, so the unit price drops. This is the most common mode in CNC machining — flexible, without the need for expensive tooling as at large scale.
Large-series production
Hundreds and thousands of pieces. Here cycle-time optimisation and repeatability matter. The set-up cost is spread across so many parts that the unit price is the lowest — provided a predictable, repeatable order.
What batch size changes
- Unit price — the larger the series, the lower it is (set-up spread over more pieces)
- Lead time — the first batch takes longer (programming, tooling); later ones are faster
- Repeatability — for a series, process stability and quality control matter
How to choose — and why it pays to plan
If the part will come back, it is worth thinking about a steady partnership or a framework order — then the set-up is done once, and the unit price and lead time are more favourable. We wrote about it in the article on a permanent CNC supplier.
Frequently asked questions (FAQ)
Do you make single pieces?
Yes — from a single prototype and spare part to small- and large-series production.
Why is a single piece more expensive than in a series?
Because all the set-up (program, tooling) falls on one part. In a series this cost is spread over many pieces.
Is it worth ordering a larger series in stock?
Often yes — a lower unit price. It is worth calculating individually, ideally in a steady-partnership model.
Planning a series of parts? Send the model and the expected quantity — we will choose the technology and quote. Send an enquiry or see our CNC offer.
