Precision CNC milling
CNC Milling for Custom Precision Parts
6CNC provides CNC milling for metal and plastic parts that require accurate dimensions, clean surface finishes, and reliable repeatability—from early prototypes to controlled small-batch production.
Flat surfaces, slots, pockets and complex contours
Feature-specific tolerances reviewed down to ±0.002 mm
3-axis, 4-axis and 5-axis machining support
DFM review included
1–600 part production range
Worldwide delivery
±0.002 mm
Feature-specific tolerance review
1–600 pcs
Prototype and low-volume support
Ra 1.6
Controlled machined surface finish
140+ Machines
Flexible manufacturing capacity
Manufacturing experience across industries
Consistent accuracy
CNC Milling That Delivers Reliable Fit and Function
Precision matters when parts must fit and function together. 6CNC controls machining accuracy through stable equipment, appropriate tooling, workholding, datum planning, and in-process verification.
Multi-axis machining centers reduce repositioning during production. Fewer setups can reduce alignment error and help maintain consistency from the first part through the final part in a batch.
Tolerance capability depends on feature size, geometry, material, wall thickness, tool reach, datum strategy, finishing, and inspection method. Send the controlled drawing so our engineers can confirm what is realistic and measurable.
Process selection
When CNC Milling Is the Right Choice
6CNC reviews the geometry and recommends the process that fits the part—not simply the equipment available.
Choose milling
CNC Milling
Best for flat surfaces, parallel or square faces, slots, pockets, cavities, complex outer profiles, contours, and features on multiple faces.
Choose turning
CNC Turning
Usually more efficient for primarily cylindrical parts such as shafts, sleeves, bushings, threaded parts, and rotational features.
Choose 5-axis
5-Axis Machining
Can reduce setups and improve access for multiple angled surfaces, compound geometry, deep features, and complex multi-face parts.
Milling capabilities
CNC Milling Services for Complex Geometry
Our milling resources support straightforward prismatic parts and complex multi-face components across prototype and small-batch quantities.
3-Axis Milling
Efficient machining for faces, pockets, holes, slots, brackets, plates, and fixtures.
4-Axis Milling
Indexed machining around a rotary axis for side features and reduced manual repositioning.
5-Axis Milling
Complex angles, multiple faces, deep geometry, and critical relationships completed with fewer setups.
Precision Secondary Operations
Drilling, reaming, tapping, boring, grinding coordination, and finishing around functional requirements.
Flexible production
Prototype Learning to Repeatable Small Batches
6CNC supports a typical production range of 1 to 600 parts, allowing teams to validate designs before committing to larger quantities.
01
Prototype Milling
Validate fit, geometry, assembly, material, and surface requirements.
- Start from one part
- Fast design feedback
- DFM recommendations
02
Low-Volume Production
Produce flexible batches with controlled setups, inspection, and finishing.
- Typical range: 1–600 parts
- Stable workholding
- Consistent quality controls
03
Repeat Orders
Maintain revision, tooling, setup, and inspection knowledge for recurring demand.
- Revision control
- Repeatable inspection
- Scheduled delivery
CNC machining materials
Materials for Precision CNC Milling
6CNC mills a broad range of metals, plastics, and composites for prototypes and small batches. Select a material to review common grades, milling considerations, compatible finishes, and RFQ requirements.
Aluminum
Aluminum offers an excellent balance of strength and weight, making it a preferred choice for mechanical components. Its natural oxide layer provides reliable resistance against corrosion, even in demanding environments.
Material group
Metal alloy
Grades / options
Aluminum 6061 Aluminum 6063 Aluminum 6082 Aluminum 7075 Aluminum 2024 Aluminum 5052 Aluminum A380
Compatible finishes
As machined, bead blasting, anodizing, chromate conversion, powder coating, polishing
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Stainless Steel
6CNC delivers high-precision stainless steel CNC machining for durable, custom-engineered parts. From rapid prototyping to full-scale production, we support demanding applications across global industries with consistent quality and tight tolerances.
Material group
Metal alloy
Grades / options
Stainless Steel 201 Stainless Steel 301 Stainless Steel 303 Stainless Steel 304 Stainless Steel 316 Stainless Steel 416
Compatible finishes
As machined, passivation, polishing, bead blasting, electropolishing, plating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Brass
6CNC provides precision brass CNC machining for custom parts and prototypes, delivering excellent surface finishes, tight tolerances, and efficient production turnaround.
Material group
Metal alloy
Grades / options
Brass C35600 Brass C36000 Brass C37700 Brass C37000 Brass C37100 Brass C28000 Brass C26000 Brass C24000 Brass C22000
Compatible finishes
As machined, polishing, nickel plating, tin plating, protective coating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Copper
6CNC delivers high-precision copper CNC machining for custom parts, ensuring outstanding electrical conductivity, dimensional accuracy, and long-term reliability across demanding applications.
Material group
Metal alloy
Grades / options
Copper C11000 Copper C12000 Copper C12200 Copper C10100
Compatible finishes
As machined, polishing, nickel plating, tin plating, protective coating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Titanium
6CNC offers precision titanium CNC machining for aerospace, medical, and automotive applications. We manufacture high-accuracy, high-strength components to your exact specifications, even for complex geometries and tight tolerances.
Material group
Metal alloy
Grades / options
Titanium Grade 2 Titanium Grade 5 (Ti-6Al-4V) Titanium Grade 7 Titanium Grade 9 (Ti-3Al-2.5V) Titanium Grade 23 (Ti-6Al-4V ELI)
Compatible finishes
As machined, bead blasting, polishing, anodizing, passivation
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Mild Steel
Mild steel features low carbon content, making it easy to machine, weld, and form while still providing reliable mechanical strength at a cost-effective price point. It’s widely used for structural components, fixtures, and general engineering parts.
Material group
Metal alloy
Grades / options
Steel S235JR | 1.0038 Steel C45 | 1.0503 Steel S355J2 | 1.0570 Mild Steel 1045 Mild Steel A36 Mild Steel 1018
Compatible finishes
As machined, black oxide, zinc plating, nickel plating, powder coating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Alloy Steel
6CNC manufactures precision alloy CNC machined parts using advanced machining technologies, ensuring consistent quality, high strength, and reliable performance across demanding applications.
Material group
Metal alloy
Grades / options
4140 Steel 4340 Steel 1215 Steel 16MnCr5 Specialty Alloys
Compatible finishes
As machined, black oxide, plating, heat treatment, grinding
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Tool Steel
Tool steel is engineered for high hardness, wear resistance, and dimensional stability, making it ideal for molds, dies, cutting tools, and other high-stress applications.
Material group
Metal alloy
Grades / options
Tool Steel A3 Tool Steel H13 | 1.2344 Tool Steel S7 Tool Steel O1 Tool Steel A2 | 1.2363 Tool Steel D2 | 1.2379
Compatible finishes
As machined, heat treatment, grinding, polishing, coating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Polycarbonate
Polycarbonate combines impact resistance, low weight, and optional optical clarity. Machining plans should account for heat generation, residual stress, edge quality, workholding marks, and whether transparent surfaces require polishing or protective handling.
Material group
Plastic or composite
Grades / options
Polycarbonate (PC). Confirm grade, color, transparency, certification, and cosmetic requirements on the drawing or RFQ.
Compatible finishes
As machined, polishing, protective handling
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Nylon
Nylon CNC machining allows the creation of precise, durable, and lightweight components suitable for a wide range of industrial applications. 6CNC provides high-quality custom nylon parts, delivering reliable performance and excellent wear resistance.
Material group
Plastic or composite
Grades / options
Nylon 66
Compatible finishes
As machined, tumbling, dyeing where applicable
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
ABS
ABS has good impact strength, dimensional stability, and is easy to finish with painting, plating, or silk screening. Its relatively low cost and versatility make it a top choice across many industries.
Material group
Plastic or composite
Grades / options
ABS (Standard) Flame Retardant ABS (FR-ABS) ABS+PC Glass Fiber Reinforced ABS
Compatible finishes
As machined, painting, plating, silk screening
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Delrin (POM)
Delrin CNC machining produces strong, low-friction, and dimensionally stable parts, ideal for gears, bearings, and precision components. 6CNC manufactures high-accuracy custom Delrin (POM) parts to meet your exact specifications.
Material group
Plastic or composite
Grades / options
Delrin 150 Delrin 100 (AF)
Compatible finishes
As machined, tumbling, polishing
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Polypropylene
Polypropylene CNC Machining Polypropylene CNC machining enables the production of precise, lightweight, and chemical-resistant parts with tight tolerances. 6CNC provides reliable custom components tailored to your specifications for a variety of industrial and consumer applications.
Material group
Plastic or composite
Grades / options
Confirm the exact grade, color, certification, and condition in the RFQ.
Compatible finishes
As machined, deburring, protective handling
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
PTFE / Teflon
PTFE CNC machining enables the production of chemical-resistant, low-friction, and high-performance parts suitable for demanding industrial applications. 6CNC delivers precise custom Teflon components tailored to your specifications.
Material group
Plastic or composite
Grades / options
Confirm the exact grade, color, certification, and condition in the RFQ.
Compatible finishes
As machined, deburring, specialized surface treatment
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Acrylic
Acrylic CNC machining allows for precise cutting and shaping of clear, durable parts with smooth, polished surfaces. 6CNC provides custom acrylic components tailored to your specifications, ideal for displays, lenses, and protective covers.
Material group
Plastic or composite
Grades / options
Confirm the exact grade, color, certification, and condition in the RFQ.
Compatible finishes
As machined, hand polishing, vapor polishing where applicable
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
UHMW-PE
UHMW-PE CNC machining enables the production of highly durable, low-friction, and wear-resistant components. 6CNC manufactures precise custom polyethylene parts ideal for industrial, mechanical, and chemical applications.
Material group
Plastic or composite
Grades / options
Generic UHMW-PE
Compatible finishes
As machined, deburring, protective handling
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Carbon Fiber
Carbon fiber CNC machining produces lightweight, high-strength composite parts with excellent stiffness and dimensional accuracy. 6CNC manufactures custom carbon fiber components tailored to demanding industrial, automotive, and aerospace applications.
Material group
Plastic or composite
Grades / options
Confirm the exact grade, color, certification, and condition in the RFQ.
Compatible finishes
As machined, edge sealing, protective coating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
PEEK
PEEK is one of our core high-performance plastic materials. It combines the advantages of metal strength with plastic lightness and corrosion resistance, making it an ideal replacement for metals in extreme environments.
Material group
Plastic or composite
Grades / options
Virgin PEEK (Unfilled) 30% Glass Fiber Reinforced PEEK (PEEK GF30) 30% Carbon Fiber Reinforced PEEK (PEEK CF30)
Compatible finishes
As machined, polishing, specialized cleaning
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
FR4
FR4 is a flame-retardant glass fiber epoxy laminate widely used in electrical and electronic applications. It offers excellent mechanical strength, electrical insulation, and thermal stability, with properties comparable to G-10, making it ideal for circuit boards, insulators, and structural components.
Material group
Plastic or composite
Grades / options
Confirm the exact grade, color, certification, and condition in the RFQ.
Compatible finishes
As machined, deburring, protective coating
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Rubber
Rubber CNC machining enables the production of precise, custom-engineered rubber parts for a wide range of industrial and mechanical applications. 6CNC delivers reliable, high-quality precision solutions tailored to your specifications.
Material group
Plastic or composite
Grades / options
Hydrolysis Resistant PU EPDM FKM Nitrile Silicone Neoprene
Compatible finishes
As machined, trimming, specialized surface treatment
RFQ requirements
Confirm grade, condition, certification, critical dimensions, finish, quantity, and acceptance criteria.
Surface finishing
Finishing Options for CNC Milled Parts
After CNC milling, 6CNC can coordinate finishing to improve corrosion resistance, wear performance, conductivity, friction, or appearance. Availability depends on the milled geometry, material, masking, coating thickness, dimensional allowance, and acceptance criteria.
| Finish | Applicable materials | Colors | Can be combined with |
|---|---|---|---|
| As Machined | Metals and plastics | Natural material color | Most secondary finishing processes |
 Anodizing | Aluminum | Clear, black, grey, red, blue, gold | Bead blasting, tumbling, masking |
 Black Oxide | Steel, selected stainless steel | Black | Tumbling, polishing, oil or wax seal |
 Powder Coating | Aluminum, steel, stainless steel | Wide range of standard and custom colors | Bead blasting, masking, conversion coating |
 Chromate Conversion | Aluminum and aluminum alloys | Clear, yellow, gold | Painting, powder coating, masking |
 Metal Plating | Aluminum, steel, stainless steel, brass, copper | Depends on nickel, zinc, chrome, tin, gold, or silver | Polishing, bead blasting, masking |
 Polishing | Metals, acrylic, selected plastics | Natural material color | Plating, anodizing, passivation |
| Bead Blasting | Aluminum, steel, stainless steel, brass, titanium | Uniform matte appearance | Anodizing, powder coating, plating |
Additional finishes may be available after technical review. Include the governing specification, thickness range, masking notes, and acceptance criteria with your RFQ.
Inside 6CNC
Manufacturing Resources for Reliable CNC Milling
Our Shenzhen facility combines multi-axis machining, inspection, finishing coordination, and production control to support fast global delivery.
Industry applications
CNC Milling Applications
6CNC provides custom milled parts for demanding industrial applications. Each project is planned around geometry, material, tolerance, surface finish, inspection, documentation, and delivery requirements.
Automotive Precision Parts
Brackets, housings, fixtures, drivetrain components, prototype assemblies, and lightweight aluminum structures for automotive development.
Smart Manufacturing & Automation
Robot frames, end-effectors, actuator components, sensor housings, equipment fixtures, and precision mounting interfaces.
Optical Equipment
Precision mounts, frames, lens housings, alignment components, and stable interfaces for optical and imaging systems.
Energy Equipment
Heat-transfer components, housings, valve parts, pump components, mounting structures, and precision interfaces for energy systems.
Agricultural Equipment
Custom brackets, housings, linkage parts, fixtures, shafts, and replacement components for agricultural machinery.
Maritime & Marine Parts
Corrosion-resistant fittings, housings, mounting components, custom hardware, and replacement parts for marine applications.
Engineering support
DFM Review Before Milling Begins
Many machining problems begin at the design stage. 6CNC reviews thin walls, deep cavities, tool access, internal radii, tolerance allocation, datum strategy, burr risk, and surface-finish requirements before production.
Reduce Setup Risk
Align datums, workholding, tool access, and feature sequence before machining.
Control Cost
Focus tight tolerances and finish requirements on features that affect function.
Improve Consistency
Use stable tooling, inspection planning, and revision control across batches.
Protect Delivery
Review material, finishing, inspection, and documentation before quoting lead time.
Simple project workflow
From CAD Files to Delivered CNC Milled Parts
The 6CNC CNC milling workflow keeps DFM review, setup planning, milling, inspection, finishing, and global delivery aligned.
01
Upload CAD Files
Send the model, drawing, material, quantity, finish, and delivery requirements.
02
DFM Review & Quote
We identify risks, confirm assumptions, and provide a clear quotation.
03
Production & QC
Parts are machined with agreed in-process checks and final inspection.
04
Global Delivery
Finished parts are packaged and shipped using the agreed delivery method.
Start your project
Start Your CNC Milling Project with 6CNC
Upload your design files and controlled drawing. Our engineering team will review your part and provide a clear, project-specific quotation.
Common questions
FAQ About CNC Milling
What parts are best suited to CNC milling?
CNC milling is well suited to parts with flat faces, slots, pockets, holes, cavities, contours, and features on multiple faces. Cylindrical parts may be better suited to turning, while complex angled features may benefit from 5-axis machining.
What tolerance can 6CNC achieve with CNC milling?
Tolerance depends on geometry, feature size, material, wall thickness, datum strategy, setup, finishing, and inspection. Feature-specific tolerances down to ±0.002 mm may be reviewed for suitable features and controlled conditions.
What quantities do you support?
6CNC typically supports CNC milling projects from one prototype to small batches of up to 600 parts, with the production plan adjusted to complexity and requirements.
What materials can be CNC milled?
Common options include aluminum, stainless steel, steel, titanium, brass, copper, ABS, POM, nylon, PEEK, PC, PTFE, and other engineering materials.
How do I request a quote?
Send the 3D model, controlled 2D drawing, material, quantity, finish, critical-feature notes, inspection requirements, destination, and required date.