CNC Mill Machining & Micro Machining Precision Parts from Standard to Micro Scale

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Procurement professionals, engineers, and OEM buyers — when you need reliable CNC milling for standard parts and ultra‑precise micro machining for tiny components, you need a single partner with both capabilities. With 12+ years of experience, we operate 40 CNC mills (3/4/5‑axis) and specialized micro‑machining workcells. Standard tolerances: ±0.01mm; micro machining: ±0.002–0.005mm with features down to 0.15mm.

💡 One‑stop advantage: From large brackets to micro pins — same quality system, same team. Free DFM and sample testing.

⚙️ CNC Mill Machining – Versatile, Precise, Scalable

Our CNC mill machining service handles everything from simple flat parts to complex 5‑axis geometries. Materials: aluminum, stainless steel, carbon steel, brass, copper, titanium, engineering plastics (PEEK, nylon, ABS), and nickel alloys. Part sizes from small (few mm) up to 2 meters.

🎯 Typical Milled Parts

  • Brackets, housings, enclosures
  • Gears, connectors, structural frames
  • Prototype to high‑volume production

⚡ Standard Lead Times

  • Prototypes: 3–6 days
  • Bulk (10,000+ units): 10–20 days
  • Rush options available

Real example: Electronics client – 15,000 aluminum housings, ±0.008mm, complex slot patterns. Delivered on time, 0% defects. Later expanded to micro machining for sensor contact pins.

🔬 Micro Machining – Ultra‑Precision for Tiny Components

Our micro machining capability leverages high‑speed spindles (up to 60,000 RPM), micro‑cutting tools (diameters from 0.2mm), and precision workholding. Achievable features:

  • Minimum feature size: 0.15mm (depending on material)
  • Tolerances: ±0.002–0.005mm (µm level)
  • Surface finishes: Ra <0.2μm on micro features
  • Typical parts: micro shafts, tiny connectors, surgical pins, micro gears, thin‑walled components
Medical example: Titanium surgical pins (0.5mm diameter, ±0.003mm tolerance). 500 units delivered in 5 days, meeting ISO 13485 standards.

All micro machining is performed in‑house using our high‑precision CNC mills equipped with optical measurement for in‑process verification.

🔄 How CNC Mill Machining & Micro Machining Work Together

Typical tolerance, Minimum feature size, Tool diameter, Spindle speed, Ideal for

Feature Standard CNC Mill Machining Micro Machining
Typical tolerance ±0.01 – 0.02mm ±0.002 – 0.005mm
Minimum feature size 0.5 – 1mm (typical) 0.15 – 0.3mm
Tool diameter ≥1mm 0.2 – 1mm
Spindle speed 8,000 – 15,000 RPM 30,000 – 60,000 RPM
Ideal for Brackets, housings, general parts Micro pins, sensors, medical implants, watch components

Using the same CNC platform for both scales ensures seamless transitions when your product requires a mix of standard and micro features (e.g., a housing with micro-milled alignment features).

📌 Case Studies

📱 Electronics – Sensor Housings (Standard Mill)

Volume: 15,000 units, aluminum
Tolerance: ±0.008mm
Lead time: 12 days
Result: 0% defects, repeat orders.

⚕️ Medical – Titanium Micro Pins (Micro Machining)

Volume: 500 units, 0.5mm diameter
Tolerance: ±0.003mm
Lead time: 5 days
Result: Full dimensional compliance, ISO 13485 certified.

🏆 Why Global Clients Choose Us – LEGEND Commitment

🎯 12+ Years
📦 14,000+ Mill Projects
🔬 50,000+ Micro Parts
🌍 45+ Countries
  • Experience & Expertise: 22 certified machinists, 7 senior precision engineers, 5 micro‑machining specialists.
  • Authoritativeness: ISO 9001:2015, IATF 16949, AS9100D, ISO 13485. Inspection: CMM, optical measuring systems, high‑magnification microscopes, surface profilometers.
  • Trustworthiness: 100% quality guarantee – free rework or replacement. Real‑time tracking, photos, reports. 99.4% on‑time delivery, 97% retention rate.

📏 Micro Machining Capability Table (CNC Mill Based)

Aluminum (6061, 7075), Stainless steel (303, 304, 316), Titanium (Grade 5), Brass / Copper, Engineering plastics (PEEK, Acetal)

Material Min. Feature Size Typical Tolerance Min. Tool Diameter Achievable Surface Finish (Ra)
Aluminum (6061, 7075) 0.15mm ±0.002 – 0.005mm 0.2mm Ra 0.1 – 0.4μm
Stainless steel (303, 304, 316) 0.2mm ±0.003 – 0.005mm 0.3mm Ra 0.2 – 0.6μm
Titanium (Grade 5) 0.25mm (specialized) ±0.003 – 0.005mm 0.3mm Ra 0.2 – 0.6μm
Brass / Copper 0.15mm ±0.002 – 0.005mm 0.2mm Ra 0.1 – 0.4μm
Engineering plastics (PEEK, Acetal) 0.2mm ±0.005 – 0.01mm 0.3mm Ra 0.2 – 0.8μm

* Tighter tolerances possible for specific geometries; contact us for a feasibility review. Micro machining often requires slower feeds and specialized tooling, affecting cost and lead time.

❓ Frequently Asked Questions

🔹 What is the smallest hole you can micro‑mill?
We can mill holes down to 0.2mm diameter in metals, and 0.15mm in plastics or brass. Smaller holes may require EDM or laser drilling.
🔹 Can you combine standard milling and micro machining on the same part?
Yes – for example, a housing with macro‑sized pockets and micro‑milled alignment features or micro‑grooves.
🔹 How does micro machining affect lead time and cost?
Micro machining typically adds 30–50% to cycle time due to slower feeds, smaller tools, and frequent tool changes. We provide a detailed cost breakdown upfront.
🔹 What inspection equipment do you use for micro parts?
We use non‑contact optical measuring systems, high‑magnification microscopes, and ultra‑precision CMM with sub‑micron resolution.

🚀 Get Your Free CNC Mill & Micro Machining Quote

Send your CAD drawing (STEP, IGES, PDF) to mill@cncmicro.com or use the form below

Engineering review within 24h | Free DFM & sample testing

🎯 Need standard CNC milled parts or ultra‑precise micro components? One supplier, seamless quality. Email: info@legend-mfg.com or call +86-189-2451-7393.

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