Response within 24 hours  ·  NDA available  ·  ±0.01mm precision info@ataimeisen.com
Your drawings are analyzed inside your browser — they never leave your device. No upload, no server, no risk. Try the free Instant Quote →

Precision CNC Machining Manufacturer for Custom OEM Parts

CNC machining supplier providing precision milling, turning and prototype solutions for global manufacturers — from first prototype to stable monthly production.

±0.01mm Tolerance 3/4/5-Axis Machining Full Material Range Export to 30+ Countries

Upload your 2D PDF + 3D STEP and see a reference price in seconds — your files are analyzed in your browser and never uploaded. No signup required.

CNC machining workshop overview showing rows of CNC machines in production Live production · 40+ CNC machines running
±0.01mmPrecision Capability
24hQuote Response
100%Inspection Before Shipment
30+Export Countries
ISO 9001:2015Aligned QMS
FSCPRECISION by the Numbers

Real Capacity, Verified

Every figure below comes from our own Shenzhen shop floor — not a marketing estimate.

11+Years machining (since 2015)
40+CNC machines (3/4/5-axis)
6,000Production floor area
50,000+Parts produced per month
30+Export countries
100%Inspected before shipment
24hEngineer quote response
±0.01mmTolerance capability

On-time delivery rate and total customer count are not published until we have verified figures — we'd rather show you real numbers than round ones.

How Ordering Works

From Drawing to Delivery in 5 Clear Steps

Full transparency on who does what — you always know exactly what happens next.

You provide
1

Upload Drawings

Send 2D/3D files (STEP, IGES, DWG) with material and quantity requirements.

We handle
2

DFM Review & Quote

Engineers check manufacturability and send a detailed quote within 24 hours.

We handle
3

Prototype Approval

First article with inspection report for your approval before production.

We handle
4

Production & QC

Batch production with in-process checks and 100% final inspection.

We handle
5

Shipping & Reports

Worldwide delivery (DHL/FedEx/sea) with CMM reports and material certs.

Our CNC Machining Capabilities

One Supplier, Complete Machining Services

CNC Milling

3-axis, 4-axis and 5-axis CNC milling for complex precision components.

Learn more →

CNC Turning

High precision CNC turning for shafts, bushings and custom round parts.

Learn more →

Prototype Machining

Fast prototypes from your CAD drawings — as quick as 5 working days.

Learn more →

Mass Production

Stable, repeatable production for monthly volume orders with consistent quality.

Learn more →
CapabilitySpecificationTypical Lead Time
Tolerance (milling/turning)±0.01mm (tighter on request)
Max machining size1,000 × 600 × 550 mm
Surface roughnessRa 0.8 μm (polishing available)
Prototypes1–100 pcs5–7 working days
Low-volume production100–10,000 pcs2–4 weeks
Materials

Machined in the Material Your Project Needs

Not sure which? Read our aluminium vs stainless vs titanium comparison →

Aluminum

6061, 6063, 7075, 2024 — anodizing, hardcoat & chromate finishes.

Aluminum CNC machining →

Stainless Steel

304, 316, 17-4PH, 420 — passivation & polishing available.

Stainless steel parts →

Brass & Copper

H59, C3602, C1100 — ideal for electrical & decorative components.

Brass parts →

Engineering Plastics

POM, PEEK, Nylon, PC, PTFE, ABS — insulating & lightweight parts.

Plastic machining →
Why Choose Us

Built for OEM Supply Programs

±0.01

mm Precision Capability

CMM-verified tight tolerances, with inspection reports on every shipment.

24h

Fast Response

Every RFQ answered by a real engineer within 24 hours — no auto-replies.

100%

Inspection Before Shipment

Strict inspection process before every shipment. Reports available on request.

40+

Advanced CNC Machines

3/4/5-axis milling, turning centers and mill-turn equipment.

NDA

Your Designs Stay Safe

We sign NDAs before reviewing drawings. Files are never shared.

30+

Countries Served

Global export experience with DDP, FOB and EXW shipping terms.

Inside Our Factory

40+ CNC Machines. Real Production, Real People.

A look at our facility in Shenzhen — the equipment, the workforce and the production lines that handle your OEM programs every day.

11+ yrsMachining since 2015
6,000 m²Production floor area
40+CNC machines (3/4/5-axis)
200+Trained operators & engineers
50,000+Parts produced per month

We are the factory — not a trading company. Every part is machined on our own 40+ CNC machines here in Shenzhen. The floor you see in these photos is the same one that cuts your order, run by the same engineers who quote it. Our quality system runs on ISO 9001:2015-aligned processes, and material certificates are available on request.

Technical Resources

The Numbers We Work To — Free to Use

Reference tables and straight answers about pricing, written by the people cutting the parts. No download, no email required.

CNC Tolerance Chart

ISO 2768 tables for all four classes, achievable tolerances by process, every GD&T symbol, and the tolerance-cost curve.

Aluminium Grade Chart

6061 vs 7075 vs 5052 vs 2024 vs 6063 vs 2A12 — strength, weldability, anodising response, cost, plus a decision tree.

Surface Finish Chart

Nine finishes compared on thickness, hardness, salt spray hours and cost — including what each one does to your fits.

Why Quotes Differ 5x

We lost a job by a factor of five and explained exactly why. What ten years of process optimisation actually buys.

See all technical resources →

Case Study

Real Projects, Real Results

Aluminum robotics housing enclosure with complex internal pockets
Robotics5-AxisUSA Customer

Aluminum Robotics Housing Parts

A US robotics company needed a complex aluminum enclosure with tight tolerances and stable monthly supply.

Solution5-axis CNC machining
Material6061 Aluminum
Tolerance±0.01mm
Quantity500 pcs / month
ChallengeComplex geometry
Lead time2 weeks / batch

✓ Result: Stable production and repeat orders for 18 consecutive months.

View all case studies →

FAQ

Questions OEM Buyers Ask Us

What is your minimum order quantity?
There is no strict MOQ. Prototype orders from 1 piece are welcome; for production orders our pricing becomes most competitive from 100+ pieces.
What tolerances can you actually hold?
Our standard tolerance is ±0.05mm; ±0.01mm is achievable depending on geometry, feature size and material. Your quote will state the guaranteed tolerance for each feature — we never overpromise.
How fast can I get a quote?
Within 24 hours on working days. Complex assemblies may take up to 48 hours — if so, we'll tell you immediately and share a preliminary price range.
Will you sign an NDA before we send drawings?
Yes. Send your NDA template or use ours. We sign before any technical files are exchanged, and drawings are deleted from our servers on request.
Do you provide inspection reports?
Every shipment includes a dimensional inspection report. CMM reports, material certificates and full first-article inspection (FAI) reports are available on request.
What file formats do you accept?
STEP, IGES, STL, XT, DWG, DXF and PDF drawings. If you only have a sketch or sample part, our engineers can help create drawings first.

Ready to start your CNC project?

Send your drawings today — get a detailed quote within 24 hours.

Get Free Quote

Related: CNC machining in China — sourcing from a vetted Shenzhen supplier