Precision CNC Milling Services

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50+ Materials Available
Fast Turnaround (3-15 days)
Tolerance up to ±0.025mm
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Overview

What is CNC Milling?

CNC (Computer Numerical Control) milling is a subtractive manufacturing process that uses computer-controlled rotating cutters to remove material from a workpiece. The process transforms solid blocks of metal, plastic, or other materials into precise custom parts by following programmed tool paths.
CNC milling at Partwork offers 3-axis, 4-axis, and 5-axis machining capabilities, enabling complex geometries, tight tolerances, and superior surface finishes across a wide range of materials.

Milling Capabilities

Standard Machine Capacity

  • Max Part Size: 1000mm × 600mm × 500mm
  • Min Feature Size: 0.5mm
  • Tolerance: Standard ±0.1mm, Precision ±0.025mm
  • Surface Finish: Ra 3.2μm (Standard), Ra 0.4μm (Achievable)

Machining Capabilities

  • 3-Axis Milling: Standard flat & prismatic parts
  • 4-Axis Milling: Rotational features & curved surfaces
  • 5-Axis Milling: Complex geometries & undercuts
  • Thread Milling: Internal & external threads
  • Drilling & Tapping: Precision hole making

Versatility & Precision

  • Complex geometries & intricate features
  • Tight dimensional accuracy
  • Prototypes to production runs

Available Materials

View complete material specifications in our Materials Library

1Aluminum Alloys

Al 6061-T6Al 6082Al 7075-T6Al 6063Al 2014

2Stainless Steel

SS304 / SS304LSS316 / SS316LSS303SS42017-4 PH

3Carbon & Alloy Steels

1018 / EN3B1045 / EN8EN19 / 4140EN24 / 434041301215

4Tool Steels

D2O1 / OHNSA2M2

5Copper & Brass Alloys

C110 / ETP CopperC17200 / Beryllium CopperC36000 / Free-cutting BrassNaval Brass

6Specialty Alloys

Titanium Grade 2Titanium Grade 5 (Ti-6Al-4V)Inconel 718Hastelloy C276Monel 400

7Engineering Plastics

Delrin / POMNylon 6/6PEEKPTFE / TeflonABSHDPE

Quality Assurance

  • First Article Inspection (FAI)
  • In-Process Inspection
  • Final Inspection (100% dimensional check)
  • Material Certification (Mill Test Reports)
  • CMM Measurement
  • Surface Roughness Testing

Lead Times

Standard 7-10 days
Express 3-5 days
Production Varies by volume

Milling vs Standard Machining

FeatureStandard MachiningCNC Milling
PrecisionVariable
±0.025mm
ComplexitySimple geometries
Complex Multi-Axis
MaterialsLimited
50+ Grades
TurnaroundWeeks
Days

Scale With Us

From prototyping to full-scale production, we support your growth.

  • 1Prototypes
  • 10Pilot Runs
  • ∞Mass Production

Industries Served

AutomotiveAerospaceMedical DevicesRoboticsElectronicsIndustrial EquipmentEnergy

Frequently Asked Questions

We accept STEP, STP, IGES, IGS, STL, X_T, SAT, and other common CAD formats.

Standard lead time is 7-10 days. Express service available for 3-5 days delivery.

No minimums. We handle single prototypes to production volumes of 10,000+ units.

Yes, we can achieve tolerances down to ±0.025mm for critical dimensions.

Yes, mill test certificates (MTC) are available for all metals upon request.

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