Overview
What Is Small Batch CNC Machining?
Small batch CNC machining, also called low volume CNC machining, is the production of a small number of precision parts using computer-controlled milling and turning machines, without a mandatory minimum order quantity. Each part is machined directly from solid metal or engineering plastic, producing finished components that are dimensionally accurate and ready for use without the cost or delay of dedicated tooling. Smell batches are usually required for prototypes, small series or pre-series and spare parts.
Compared with post-molding assembly, insert molding offers several important advantages:
How it works:
STEP, IGES, DXF, DWG or PDF drawings accepted. Sketches or dimensions work too for simple parts.
Itemised price covering unit cost, material, surface finish, and confirmed lead time.
Engineers review your design for manufacturability, then machining starts immediately after your sign-off.
Every batch is dimensionally inspected before packing. Ships worldwide door-to-door with a quality report.
Comparison
Small Batch vs Large Volume
The machining process is identical at any volume. What changes is how setup cost is spread across fewer parts. For most small batch orders there is no additional tooling cost. Standard end mills cover the majority of geometries.
| Factor | Small Batch (1–200 pcs) | Large Volume (500+ pcs) |
|---|---|---|
| Unit price | Higher per piece | Lower per piece |
| Tooling cost | Usually none | May apply for custom fixtures |
| Lead time | 5–10 days | 10–25 days |
| Design changes | Easy — no tooling to remake | Costly if tooling is involved |
| Inventory risk | Minimal | Higher |
| Best for | Prototypes, pilots, R&D, spare parts | Mature, stable designs at scale |
Classification
Types of Tolerances in CNC Machining
Tolerances are not one-size-fits-all. Different aspects of a part require different tolerance types, each controlling a specific characteristic of the finished component.
PROTOTYPES / DEVELOPMENT
Test form, fit, and function before committing to production tooling. Machine a handful of parts from the target material and find design issues early, when changes are cheap.
1–10 pcs · Any material · 3–5 day lead time
PILOT, PRE-PRODUCTION & SMALL SERIES
Bridge the gap between prototype and mass production. Validate the manufacturing process, confirm assembly fit, and enable customer testing without large inventory commitment.
10–200 pcs · Production materials · Assembly-ready
SPARE PARTS
Keep legacy equipment running without stocking large quantities. Order exactly what you need, even a single replacement part, machined to the original specification.
From 1 pc · Match original tolerances · Fast delivery
Materials for Low Volume Machining
All standard CNC materials are available in small quantities. No minimum stock requirement. Contact us to confirm availability for specific alloys or grades.
ALUMINUM ALLOYS
- 6061-T6 (general purpose)
- 7075-T6 (high strength)
- 2024-T3 (fatigue resistance)
- 5052-H32 (marine grade)
STAINLESS STEEL
- 303 · 304 / 304L
- 316 / 316L
- 17-4 PH
- 420
STEEL & TOOL STEEL
- Mild Steel (S235, 1018)
- 4140 · 4340
- D2 Tool Steel
- H13
COPPER, BRASS & TITANIUM
- Brass C360
- Copper C101
- Titanium Grade 2
- Ti-6Al-4V (Grade 5)
ENGINEERING PLASTICS
- POM / Delrin · PEEK
- PA6 / PA66 (Nylon)
- PTFE · PC · HDPE
- UHMW-PE · ABS
SURFACE FISNIH/TREATMENT
- Anodising (Type II & III)
- Bead Blasting
- Powder Coating
- Nickel · Black Oxide · As-machined
Our Small Batch Manufacturing Process
Four straightforward steps from design file to delivered parts. No account setup, no sales calls — just send your files and we handle the rest.
Technical Specification
Machining Specification
Our CNC machining centers and lathes hold tight tolerances consistently across small and large runs alike. The same process capability regardless of batch size.
| Parameter | Specification |
|---|---|
| Standard Tolerance | ±0.05 mm |
| Tight Tolerance | ±0.01 mm |
| Default Standard | ISO 2768 medium |
| Minimum Batch Size | 1 piece |
| Typical Small Batch | 1–200 pieces |
| Quote Lead Time | Within 24 hours |
| Production Lead Time | 5–10 working days |
| Shipping (Express) | 3–5 days to Europe / USA |
| File Formats | STEP, IGES, DXF, DWG, PDF |
| Quality Certification | ISO 9001:2015 |
Why Small Batch at Davantech
No small-order surcharge. Price reflects actual machining time and material. Nothing more.
Managed by a European team on-site. English communication, ISO drawings, European quality expectations.
Your parts are machined in our own facility. One point of accountability, consistent quality.
Machine-hour rates of $18–$35 vs. $75–$120 in the West. Savings of 40–70% without quality risk.
Scale from 1 prototype to 500 production parts without re-qualifying a new vendor.
Scale from 1 prototype to 500 production parts without re-qualifying a new vendor.
Good Fit
Small Batch CNC Is Ideal When:
✔ You need prototypes or samples before committing to production tooling
✔ Your volumes are naturally low (1–200 pcs per order)
✔ The design may still change — no expensive tooling to remake
✔ You need spare or replacement parts on demand
✔ You require a specific material or tight tolerance not achievable by injection moulding
✔ Speed matters — 5–10 day lead time vs. 4–8 weeks for injection tooling
✔ You’re running a pilot batch before scaling to volume production
Poor Fit
Consider Alternatives When:
X You need tens of thousands of identical plastic parts. Injection moulding is cheaper at scale
X Part geometry is highly complex with undercuts best suited to casting or MIM
X Budget is the only constraint and tolerances are not critical. Consider sheet metal or 3D printing
X You need lightweight infill or structural foam — SLS or FDM may be better for non-functional prototypes