How Much Does CNC Machining Cost? Factory Pricing Factors (2026 Guide)
Short answer: a simple CNC aluminum part runs roughly $2–$15 per piece at 100–1,000 pcs; a tight-tolerance stainless steel part can run $20–$80+. What actually moves your price is material, tolerance, geometry complexity, surface finishing, quantity, and setup. Any factory that quotes you before reading your drawing is guessing. Send the drawing, get a real number.
CNC machining is priced like custom tailoring, not like buying off a shelf. Every part is quoted individually because every drawing is different. But the pricing logic is not a black box. As a source factory in Dongguan that runs CNC turning, milling, and precision machining in-house, we can show you exactly what you are paying for and where you can cut cost without cutting quality.
What Are the 8 Factors That Decide CNC Machining Cost?
1. Material: The Largest Single Line Item
Material typically accounts for 30–50% of part cost. Two things matter: the raw material price per kg and how much of it gets cut away.
| Material | Relative cost vs 6061 aluminum | Typical use |
|---|---|---|
| Aluminum 6061 | 1.0× (baseline) | General parts, enclosures, brackets |
| Aluminum 7075 | 1.4–1.8× | High-strength aerospace-style parts |
| Brass C360 | 2.5–3.5× | Fittings, terminals, corrosion-resistant parts |
| Steel 1215/1045 | 1.0–1.3× | Shafts, structural parts |
| Stainless 303 | 2.8–3.5× | Fasteners, valve parts |
| Stainless 304/316 | 3.5–4.5× | Food/medical/chemical environments |
| Titanium | 15–25× | Only when the application truly needs it |
Rule of thumb: if your part works in 6061 aluminum, do not spec 7075. If it works in 303 stainless, do not spec 316. Every upgrade multiplies material cost and often machining time too. Raw material prices also move with global aluminum and steel markets — our industry trends analysis tracks those swings so your cost model is not built on last year's numbers.
2. Tolerance: Precision Is Bought, Not Given
Tighter tolerance means slower feeds, more tool passes, more measurement time, and more scrapped parts. The jump from ±0.1 mm to ±0.01 mm can add 30–80% to machining time. Below ±0.005 mm you are in grinding/honing territory and the price curve goes nearly vertical.
| Tolerance class | What it costs you |
|---|---|
| ±0.1 mm (loose) | Fastest, cheapest. Fine for cosmetic/structural fits |
| ±0.05 mm | Standard for most machined parts |
| ±0.01 mm | Requires good machines and careful setup, moderate cost up |
| ±0.005 mm | Our production capability, needs stable machines + CMM check |
| ±0.002 mm | Special processes, high cost, long lead time |
Practical advice: only call the tolerances your design actually needs. A hole that mates with a bearing needs tight tolerance; the cosmetic pocket next to it does not. We hold ±0.005 mm on production parts at BQUQ, but we will tell you straight when a drawing asks for something that only drives cost up.
3. Geometry Complexity: Every Feature Costs Time
A simple block with drilled holes is cheap. Add pockets, thin walls, deep cavities, internal threads, undercuts, or 5-axis contours and each feature adds cycle time. Thin walls (under ~1 mm) are slow to machine and easy to distort. Deep holes need special tooling. Undercuts may force extra setups or EDM.
Biggest cost driver per feature is usually cycle time. Ask your supplier for the estimated cycle time per part; it is the most honest single number in a quote.
4. Quantity: Where Unit Price Stops Falling
Setup cost (programming, fixturing, first-article inspection) is spread across the batch. Going from 1 prototype to 50 pcs usually cuts unit price 40–60%. From 500 to 5,000 pcs the drop is much smaller because material and cycle time now dominate.
Sweet spot logic for most customers:
- 1–10 pcs: prototyping, expect higher per-part cost, that is normal
- 50–500 pcs: best for custom/small batch without mold investment
- 1,000+ pcs: consider whether stamping or die casting is cheaper per part
If your annual volume justifies it, we will tell you when CNC is the wrong process. A source factory that only sells CNC is a salesperson; we run stamping and heat sink lines too, so we can recommend the cheapest process that still meets the drawing.
5. Surface Finishing: Visible, But Often Over-Specified
Anodizing adds roughly $1–$3 per part depending on color and masking; electroless nickel and plating cost more; bead blasting is cheap. Cosmetic grades (scratch-free Class A surfaces) require extra handling and packaging. Specify finish only where the application needs it — an internal mounting face rarely needs cosmetic anodizing.
6. Setup and Engineering Time
Every new part number has a setup cost: CAD/CAM programming, fixture design, tooling, and a first-article inspection report. This is a fixed fee per order, not per part, and it is why small quantities are expensive per piece. Ordering multiple similar parts together, or repeating orders without design changes, spreads this cost.
7. Inspection and Documentation
Standard inspection (calipers, micrometers, basic CMM checks) is included in most quotes. If you need full CMM reports per batch, material certificates, PPAP, or ISO documentation, that adds cost. Decide what your quality system actually requires. We ship each batch with a dimensional inspection report by default — no extra charge for the basics.
8. Lead Time and Shipping
Rush orders disrupt the production schedule and cost a premium (typically 30–100% above normal for 3–5 day delivery from China). Standard air freight from Shenzhen to the US/EU runs about 5–7 days; sea freight is 25–40 days but far cheaper for heavy parts. For prototypes we often split ship: air a few pieces, send the rest by sea.
How Much Does a CNC Part Actually Cost? Real Ranges
Indicative ranges for a simple bracket/block design, excluding tooling, at a China source factory (2026):
| Scenario | Quantity | Per-part range |
|---|---|---|
| 6061 aluminum, ±0.1 mm, simple block | 100 pcs | $2–$5 |
| 6061 aluminum, ±0.02 mm, moderate pockets | 200 pcs | $6–$15 |
| Stainless 304, ±0.01 mm, machined on 3 sides | 100 pcs | $15–$40 |
| Precision shaft, ground tolerance | 500 pcs | $5–$20 (length-dependent) |
| One-off prototype, complex geometry | 1 pc | $50–$300 |
These are indicative, not quotes. The number on your drawing is what decides your number on our quotation. That is why we ask for drawings, not descriptions: a 12-hour quote from us is based on your actual geometry, not a guess.
How Do I Get the Best Price From a CNC Supplier?
Send a complete inquiry. A full inquiry contains: 3D model or 2D drawing with tolerance callouts, material spec, quantity, surface finish, and delivery target. Missing tolerances force the factory to assume the tightest — and priciest — interpretation. Vague drawings get quoted with safety margin, and you pay for it.
Second: compare like for like. When a quote looks suspiciously low, ask what tolerance, material grade, and inspection they assumed. We have rescued more than one customer who took the lowest quote and found the factory had quietly assumed ±0.5 mm and "aluminum" with no grade.
Third: ask about process alternatives. At 1,000+ pcs, progressive stamping or die casting may beat CNC at 1/3 the unit cost. We run all four lines (CNC, stamping, springs, heat sinks) in one factory in Dongguan, so the recommendation you get is the one that fits your part, not our schedule. If you want to see how redesign-for-manufacturability changed real part costs, our case studies show the numbers on actual projects.
Email sc@bquq.com or WhatsApp +86 137 1315 7787 with your PDF/DXF/STEP file. An engineer reviews it and replies with price, lead time and DFM notes on working days.
Which CNC process fits your part? (Decision tree)
| If your part... | Choose | Why |
|---|---|---|
| Is round or has turned features OD/ID/threads | CNC turning | One-setup turning of round features |
| Is prismatic with pockets, flats or slots | CNC milling (3/4-axis) | Multi-face access |
| Is under 32 mm diameter and long (L/D over 5) | Swiss-type turning | Guide bushing supports the cut |
| Has complex 3D contours on several faces | 5-axis machining | Fewer setups, better accuracy |
| Needs tighter than +/-0.005 mm or a fine finish | Add grinding or lapping | Machining alone reaches its limit |
| Runs in thousands and the shape is simple | Consider stamping instead | Lower unit cost at volume |
Frequently Asked Questions
Q: What is the minimum order quantity for CNC machining?
A: There is no MOQ at most real CNC factories — we machine 1 prototype or 100,000 parts. Setup cost makes small batches pricier per piece, but tooling is rarely needed, so single-piece orders are normal for validation.
Q: Why is my CNC quote from China much lower than local — and is it safe?
A: Lower labor and vertically integrated supply chains are the honest reasons; lower quality is the dishonest one. A direct source factory in Dongguan avoids trader markups. Verify with a sample run and a dimensional report before committing to volume. We are ISO9001 certified and ship each batch with inspection data.
Q: Can you hold ±0.005 mm on production parts?
A: Yes. That is our standard production capability for critical features on stable materials like aluminum and steel, verified with CMM. Ask for the inspection report on your first batch and check it yourself.
Q: How fast can I get a CNC machining quote?
A: Send the drawing (STEP/STP, IGES, or PDF with dimensions) to sc@bquq.com or WhatsApp +86 13713157787. We return a quotation within 12 hours on working days.
Q: What file formats do you accept for quoting?
A: STEP, STP, IGES, X_T, and PDF 2D drawings. Include material, quantity, and finish notes in the email; if something is missing we will ask before quoting, not after.
For more quick answers across CNC, stamping, springs, and heat sinks, browse the FAQ hub.
Related Articles
- CNC Machining Services in China: Capabilities, Tolerances & Lead Times — CNC machining services from a Dongguan source factory: ±0.005 mm capability, ISO9001, common materials and finishes, real lead times. Quote in 12 hours.
- CNC Machining Tolerances: ISO 2768 vs GD&T and What You Can Actually Hold — ISO 2768-mK, GD&T symbols, and what a CNC shop can actually hold: ±0.005 mm in production, and how tolerance choices move cost and lead time.
Data Sources and Verification
Tolerances, cycle times and price ranges in this guide come from BQUQ production records at our Dongguan plant, where CNC machining (±0.005 mm), stamping, custom springs and heat sinks run under one roof. BQUQ is an ISO 9001:2015 certified factory; the certificate and batch inspection reports are available on request with every quotation.
Related Resources
- About BQUQ: an ISO9001-certified source factory in Dongguan running four production lines under one roof.
- CNC products and services: browse the turning parts, milling parts, and precision components we machine every day — CNC turning parts, CNC milling parts, CNC precision components.
- Industry trends: manufacturing, material market, and sourcing analysis for buyers.
- Technical articles: CNC pricing, tolerances, and process comparisons — more where this guide came from.
- FAQ hub: quick answers on CNC, stamping, springs, and heat sinks.
- Case studies: real parts and real numbers from projects we engineered and delivered.
- Contact us: send your drawing and get a quote within 12 working hours.
Authored by the BQUQ Engineering Team. BQUQ (Dongguan) runs CNC machining (±0.005 mm), metal stamping, custom springs, and heat sink production in one ISO9001 factory. Source-direct from Dongguan, China — quote in 12 hours: sc@bquq.com | WhatsApp +86 13713157787 | www.bquq.com
