High-precision CNC machining services, providing CNC milling, turning and composite processing, suitable for high-precision structural parts and functional parts

CNC Machining for Precision Metal and Plastic Parts

XPartsLab provides CNC milling, turning, 5-axis machining and turn-mill support for prototypes and production parts. Engineers review drawings, materials, tolerances, finishes and delivery risks before production.

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CNC Machining Process Capabilities

Compare CNC milling, turning, 5-axis machining, mill-turn, grinding, wire electrical discharge machining (EDM) and Swiss-type machining by geometry, material, tolerance, finish, quantity and lead time.

CNC milling of metal parts, suitable for complex three-dimensional structures and high-precision processing

CNC Milling

Best for metal or plastic parts with flat faces, cavities, hole patterns and complex contours, including housings, brackets, fixtures and functional prototypes.

  • Common materials: aluminum alloy, stainless steel, copper alloy, carbon steel and engineering plastics.
  • Typical tolerance: ±0.01 ~ ±0.05 mm.
CNC turning of metal shafts and rotary parts, high efficiency and high consistency processing

CNC Turning

Best for shafts, sleeves, threaded features and other rotational parts that require repeatable dimensions, concentricity and consistent batch production.

  • Common materials: aluminum alloy, stainless steel, carbon steel, copper alloy and engineering plastics.
  • Typical tolerance: ±0.01 ~ ±0.05 mm.
Five-axis CNC machining of complex curved surface parts, suitable for high-precision multi-faceted machining

5-Axis CNC Machining

Best for complex surfaces, multi-sided features and deep cavities that benefit from fewer setups and tighter control of accuracy and surface quality.

  • Common materials: aluminum alloy, stainless steel, titanium alloy, copper alloy and engineering plastics.
  • Typical tolerance: ±0.01 ~ ±0.03 mm.
Turning and milling combined CNC machining complex shaft parts, completing multiple processes in one clamping

Mill-Turn Machining

Best for rotational parts with side holes, slots or flats. Turning, milling, drilling and tapping in one setup can reduce transfers between operations.

  • Common materials: aluminum alloy, stainless steel, carbon steel and copper alloy.
  • Typical tolerance: ±0.01 ~ ±0.03 mm.
CNC grinding of high-precision metal parts for precision mating surfaces

CNC Grinding

Best for finishing precision mating, shaft and locating surfaces where flatness, roundness, surface roughness or assembly clearance is critical.

  • Common materials: hardened steel, alloy steel and stainless steel.
  • Typical tolerance: ±0.002 ~ ±0.01 mm.
Wire-cut EDM processing of metal parts with complex contours, suitable for high-hardness materials

Wire Electrical Discharge Machining (EDM)

Best for hard metals, narrow slots, sharp internal features and complex contours that are difficult to reach with conventional cutting tools.

  • Common materials: mold steel, carbide, stainless steel and alloy steel.
  • Typical tolerance: ±0.005 ~ ±0.02 mm.
CNC precision machining of slender and small parts with high stability

Swiss-Type Machining

Best for slender shafts, pins, connectors and small-diameter parts that need stable support, repeatable dimensions and efficient batch production.

  • Common materials: stainless steel, copper alloy, aluminum alloy and titanium alloy.
  • Typical tolerance: ±0.005 ~ ±0.02 mm.
CNC drilling and tapping of metal parts, suitable for mounting holes and threaded holes

Drilling and Tapping

Best for mounting, locating and threaded holes that require controlled position, diameter, depth and perpendicularity for reliable assembly.

  • Common materials: metals and engineering plastics.
  • Typical tolerance: ±0.02 ~ ±0.05 mm.

Common CNC Machining Materials

Compare CNC metals and plastics by strength, corrosion, wear, temperature, appearance, cost and finishing needs.

Metal CNC machining

6061 Aluminum Alloy
7075 Aluminum Alloy
5052 Aluminum Alloy
304 Stainless Steel
316 Stainless Steel
303 Stainless Steel
45# Carbon Steel
40Cr Alloy Steel
Brass H62
T2 Copper
6061 Aluminum Alloy

6061 Aluminum Alloy

Balanced strength, machinability, corrosion resistance and cost for prototypes, housings, brackets and production parts. Multiple finishes are available.

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Engineering plastic CNC machining

ABS Engineering Plastic
Polycarbonate (PC)
Polymethyl Methacrylate (PMMA)
Polyether Ether Ketone (PEEK)
Polyphenylene Sulfide (PPS)
Polytetrafluoroethylene (PTFE)
Nylon 6 (PA6)
Nylon 66 (PA66)
Polypropylene (PP)
Acetal (POM)
ABS Engineering Plastic

ABS Engineering Plastic

Easy to machine, finish and paint for appearance prototypes, housings and panels. Choose another plastic for higher impact, heat or chemical resistance.

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View more CNC machining materials

Explore more CNC materials and finishes, or ask our engineering team to recommend an option for your project.

Engineering-Grade CNC Machining Capabilities

Get drawing analysis, manufacturability feedback, process comparison and production review before your CNC machining order moves forward.

  1. CAD and Drawing Analysis

    Upload STEP, IGES, STL, DWG or DXF files to identify key geometry and prepare process, material and quotation options.

  2. Manufacturability Review

    Review wall thickness, deep holes, internal radii, tool access, clamping, deformation risk and practical tolerances before production.

  3. Process and Quote Comparison

    Compare suitable machining routes by geometry, material, tolerance, finish, quantity, lead time and cost.

  4. Engineering and Quality Review

    Confirm critical dimensions, material grades, tolerances, finishes and inspection requirements before production begins.

  5. Materials and Tolerance Guidance

    Choose practical materials, tolerances, surface roughness and finishing options based on part use, assembly needs and budget.

How Our CNC Machining Service Works

Upload drawings, review the recommended process and quote, confirm engineering feedback, then track machining, inspection and delivery.

  1. Upload Drawings

    • Upload STEP, IGES, STL, DWG, DXF or PDF files with material, tolerance, finish and quantity requirements.
    • We identify key geometry and drawing notes for manufacturability review and quotation.
    • Timing: Initial file parsing typically takes 1–5 minutes.

  2. Project Quote

    • Compare milling, turning, 5-axis, mill-turn, grinding and wire EDM by material, quantity, tolerance, finish, price and lead time.
    • Timing: Standard parts may receive a smart quote within 30 minutes.

  3. Engineering Review

    • An engineer reviews critical dimensions, setups, tool access, thin walls, deep holes and tolerances.
    • Receive recommendations that may improve cost, quality, manufacturability or lead time.
    • Timing: Manual review and feedback are typically completed within 24 hours.

  4. Manufacturing

    • Schedule the confirmed equipment, material, tooling and process for prototypes, pilot runs or production.
    • Inspect critical dimensions, holes, threads, mating surfaces, appearance and surface roughness.
    • Typical production: 2–7 business days, subject to the confirmed quote.

  5. Delivery

    • Pack parts by material, finish and transport method, with domestic or international tracking.
    • Inspection records, material certificates or finish documents are available when agreed.
    • Shipping: Domestic transit is typically 1–7 days; international transit depends on destination.

CNC Machining Solutions by Industry

Support prototypes, functional testing and production parts across robotics, automotive, aerospace, consumer products and medical devices.

  • Robot precision structural parts
  • Automobile functional parts and interior parts
  • Aerospace lightweight parts
  • Consumer product appearance and accessories
  • Medical device metal and plastic components
  • Tooling and fixtures
  • High-precision functional verification parts
  • Complex surface and multi-faceted processing
  • Low-volume production and mass production transition
CNC machining solutions in the field of robotics for end effectors, precision structural parts and automation equipment parts

Robotics

Suitable for end effectors, joint structures, sensor brackets and functional parts of automation equipment.
Automotive parts CNC machining solutions for functional parts, interior parts, fixtures and low-volume pilot production

Automotive

Suitable for functional verification parts, interior structural parts, test fixtures and low-volume pilot production parts.
Aerospace CNC machining solutions for lightweight brackets, high-precision structural parts and drone components

Aerospace

Suitable for lightweight brackets, drone parts, high-precision structural parts and assembly verification.
Consumer product CNC machining solutions for appearance prototypes, structural verification parts and low-volume production

Consumer Products

Suitable for appearance prototypes, structural verification, assembly parts and pre-market small batch manufacturing.
Medical device CNC machining solutions for equipment structural parts, experimental instrument components and high-standard functional parts

Medical Devices

Suitable for medical equipment structural parts, experimental instrument parts and high-reliability functional parts.

CNC Machining Gallery

View CNC machining processes, representative machined parts and production equipment for prototypes and low-volume production.

CNC-milled metal housing
CNC-turned shaft components
Five-axis machined metal part
Mill-turn machined shaft component
Precision-ground metal part
Wire EDM machining setup
Swiss-type machined small components
Drilled and tapped metal plate
CNC milling center
CNC turning equipment
Five-axis CNC machining center
CNC grinding equipment
Wire EDM equipment
Machined 6061 aluminum component

CNC Machining Production Support

Coordinate machining, finishing, inspection and production tracking for precision prototypes, pilot runs and repeat production.

Match CNC milling, turning, 5-axis machining, mill-turn, grinding and wire EDM capacity to part geometry, quantity, tolerance and finish.

  • 2–7 business daysTypical CNC production lead time, subject to the confirmed quote
  • Multiple processesMilling, turning, five-axis, grinding, wire EDM coverage
  • End-to-end supportDesign for manufacturability (DFM), production, inspection and delivery coordination
XPartsLab CNC Milling Center
CNC milling center
XPartsLab CNC Turning Shop
CNC turning shop
XPartsLab Five-Axis CNC Machining Shop
Five-axis CNC machining
XPartsLab CNC grinding shop
CNC grinding
XPartsLab wire EDM workshop
Wire cutting EDM

CNC Machining FAQs

Review common questions about files, materials, tolerances, DFM, finishes, lead times, inspection and repeat production.

Already Have Drawings? Request a Custom Parts Quote

Upload your CAD files and add material, quantity, tolerance, finish and delivery requirements. We will review manufacturability and recommend the next step.

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