Full-Service CNC Machining
Your drawing. Our machining expertise.
Custom metal and plastic parts, from a first prototype to repeat production.
✓ ISO 9001:2015
✓ ISO 13485:2016
✓ AS9100D
✓ IATF 16949:2016
Your Design. Our Expertise.
Drawing-Based Quoting
Share your model, drawing and quantity for a quote built around the actual manufacturing requirements.
Manufacturability Review
Review tool access, thin walls, material and critical features before machining begins.
Inspection to Your Drawing
Define datums, fits and acceptance requirements so the finished part can be checked correctly.
Direct Engineering Support
Coordinate machining, finishing and delivery with one manufacturing team.
More Ways to Machine Your Design
CNC Milling
Pockets, mounting faces, slots and contours in metal and engineering plastics.
CNC Turning
Shafts, sleeves, fittings and threaded parts built around a common axis.
5-Axis Machining
Angled holes, complex contours and features across several faces.
Mill-Turn Machining
Combine rotational features with flats, cross-holes and off-axis details.
Swiss CNC Machining
Small, slender components requiring coordinated turning and secondary features.
Precision Grinding
Control critical surfaces, fits and geometry after the main machining operations.
How CNC Manufacturing at 6CNC Works
From Your Drawing to a Finished Part
One coordinated process for machining, inspection and delivery.
01
Share Your Drawing
Send the CAD model, controlled drawing, material, quantity and target date.
02
Review the Quote
Confirm the scope, drawing revision and any assumptions before placing the order.
03
Agree on the Process
Resolve manufacturability questions, critical tolerances and finishing requirements.
04
Machine Your Parts
Milling, turning and multi-axis operations follow the agreed manufacturing route.
05
Inspect Key Features
Check the specified dimensions and required documentation against the drawing.
06
Finish and Deliver
Complete agreed surface treatments, final checks and protective packing.
Built Around Your Part
Real components from the 6CNC gallery. Different geometries call for different manufacturing routes.
Scale From Prototype to Production
Keep the drawing revision, material, finish and inspection requirements aligned as your order moves from a first article to repeat batches.
See What We Make
Quality You Can Verify
Meet Your Manufacturing Team
One Manufacturing Team. A Coordinated Process.
Bring machining, surface finishing and inspection into the same project discussion.
Explore CNC Machining at 6CNC
Specifications
CNC Machining Specifications
6CNC reviews your drawings and 3D models carefully before preparing a quotation. Below are our current high-end manufacturing capabilities.
| Requirement | What to Specify | Our Capability (Top-tier Level) |
|---|---|---|
| Machining processes | 3-, 4- and 5-axis milling, turning, mill-turn | Full process support with 5-axis simultaneous machining as the preferred solution for complex geometries. |
| Dimensions & envelope | Overall size, stock allowance, deep features, tool access | Max machining envelope up to 1000 × 600 × 500 mm (larger sizes available on request). |
| Critical tolerances | Critical dimensions, datums, fits, GD&T | Standard precision: ±0.005 mm Critical features: ±0.001–0.002 mm Geometric tolerances (flatness, parallelism, perpendicularity, concentricity): 0.001–0.003 mm |
| Surface roughness | Ra value, measurement location, functional surfaces | Standard finish: Ra 0.4–0.8 μm High-precision / sealing surfaces: Ra 0.2 μm Mirror finish available down to Ra ≤ 0.1 μm |
| Threads & small features | Thread standard, size, pitch, class, depth, inserts | Metric, UNC/UNF and other standards supported. Precision threads (6H/6g), micro-holes and fine features available. |
| Material & condition | Exact grade, temper, heat treatment, certification | Full range of aluminum, stainless steel, titanium, high-temperature alloys and engineering plastics. Material certificates and heat-treatment reports provided. |
| Finish & appearance | Process, coating thickness, color, masking | Anodizing, hard anodizing, plating, passivation, polishing, sandblasting, etc. Dimensions controlled before or after finishing as required. |
| Order requirements | Quantity, revision, delivery date, destination, packaging | From 1-piece prototypes to low-volume production. Full dimensional inspection reports (CMM) available. |
6CNC Key Highlights
- Positioning accuracy down to 0.001 mm, repeatability at 0.0005 mm level.
- 5-axis simultaneous machining + on-machine probing + CMM inspection for stable micron-level production.
- Critical dimensions and geometric tolerances strictly controlled according to customer drawings, with complete inspection reports provided.
Materials
CNC Machining Materials
Choose from the complete range of metals, plastics, and composites supported by 6CNC for custom machining projects. Select a material to review its description, grades, and finishing options.
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.
Explore Stainless Steel machining ›
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 Finishes
Surface Finishes for CNC Machined Parts
Finishing options include anodizing, bead blasting, plating, polishing and powder coating. Availability depends on the material, geometry and finish specification.
As machined
Natural material appearance with visible tool paths. Specify burr removal and any cosmetic faces.
Anodizing
Protective aluminum finish with clear or dyed options. Review coating thickness and masking on mating features.
Bead blasting
A uniform matte texture. Define appearance expectations and whether it precedes another finish.
Metal plating
Nickel, zinc, tin and other specified coatings. Include substrate, thickness and critical dimension requirements.
Polishing
A smoother surface and reflective appearance. Identify functional and cosmetic surfaces separately.
Powder coating
Colored protective coating for compatible metals. Plan masking around threads, bores and contact surfaces.
Coating thickness can affect threads, bores and mating faces. Include masking notes and define which dimensions apply after treatment.
Design Guidelines
Design Guidelines for CNC Machining
Optimize your parts for cost-effective and high-precision CNC manufacturing. Our engineering team provides free Design-for-Manufacturability (DFM) feedback before production, helping you move smoothly from prototype to production.
| Guideline | Description | Notes |
|---|---|---|
| Internal Radii | Sharp internal corners will naturally form radii. Recommended minimum internal radius: ≥ 0.8–1.5 mm Deep pockets: keep depth ≤ 6–8× tool diameter where possible | Ensures better tool access, surface quality and dimensional stability |
| Threads & Tapped Holes | Thread depth recommendations: • Ø 1.5–5 mm → 3× diameter • Ø ≥ 5 mm → 4–6× diameter We support metric, UNC/UNF and custom threads | We can produce threads to any standard specification with high consistency |
| Undercuts | Supported undercut types: • Square profiles • Full radius • Dovetail profiles | Customizable according to part geometry and functional requirements |
| Wall Thickness | Recommended minimum wall thickness: • Aluminum: ≥ 0.8–1.0 mm • Steel / Stainless: ≥ 1.0–1.5 mm Avoid extreme height-to-thickness ratios | Maintains rigidity during machining and reduces risk of deflection |
| Text & Engraving | CNC Milling: • Minimum stroke width: 0.5 mm • Recommended depth: 0.2–0.5 mm Laser engraving also available for finer details | Clear, durable marking with customizable depth and style |
| Tolerances | Standard: ±0.10 mm (ISO 2768-m) Precision: ±0.05 mm High-precision / critical features: ±0.005–0.01 mm (or tighter on request) | Critical dimensions and GD&T should be clearly identified on the drawing |
Please mark cosmetic surfaces, specify edge breaks if required, and indicate any features that must remain free of coating or surface treatment.
Prototyping & Production
Prototyping and Production Services
CNC machining for single prototypes, small production batches and repeat orders. Choose the service that matches your project stage.
Prototype CNC Machining
Machine functional parts to evaluate fit, assembly and performance before ordering a production batch.
- Start with a single component
- Review material and machining options
- Update your design before production
Small-Batch Production
Produce project quantities with machining, finishing and dimensional requirements planned together.
- Setups planned around order quantity
- Coordinated material and surface finishing
- Consistent drawing requirements across the batch
Repeat-Order Support
Keep approved files, material grades and finishing specifications aligned for subsequent orders.
Industries
Industries We Serve
We manufacture custom components for aerospace, robotics, medical equipment, industrial machinery and energy applications.
Aerospace
Lightweight brackets, mounts and structural components with geometry and material requirements defined by the application.
Robotics & automation
Fixtures, mounting plates, shafts and interfaces designed for assembly, alignment and repeated motion.
Medical equipment
Instrument parts, housings and mechanical components with application-specific material and surface requirements.
Industrial & energy
Manifolds, fittings, housings and equipment components with critical threads, sealing faces and mating features.
Our Facility
Built for Precision, Speed and Reliable Production
Our manufacturing facility combines 3-axis, 4-axis, 5-axis, turning, mill-turn, grinding, and inspection resources to support custom prototypes and small-batch production.
With more than 140 CNC machines and coordinated quality control, our team plans machining, inspection, finishing, and delivery around the requirements that matter to your part.
CNC Machining FAQs
Answers to common questions about CNC machining quotes, process selection, materials, tolerances and lead times.
What files should I send for a CNC machining quote?
Send a STEP or IGES model with a controlled PDF drawing when available. Include material, quantity, finish, critical dimensions and delivery destination. A 2D drawing is especially useful for tolerances, threads, datums and surface roughness that are not defined in the model.
How do I choose milling, turning or 5-axis machining?
Start with the geometry. Rotational parts often suit turning; pockets and prismatic forms suit milling. Mill-turn can combine rotational and off-axis features, while 5-axis machining helps with compound angles and difficult tool access. We review the complete part before recommending a route.
Can I order a single prototype or a small batch?
Yes. 6CNC supports prototypes and small-batch custom parts. Send the required quantity and any planned repeat orders so material, setup and finishing can be considered together.
What tolerances should I put on my drawing?
Identify dimensions that control function and assembly, then apply the tolerance each feature actually requires. State datums, fits, GD&T and roughness where relevant. Tight tolerances should be reviewed against material, geometry, setup and the intended measurement method.
Can machined parts include surface finishing?
Yes. Available options depend on material and part requirements. Include color, coating specification, thickness, masking and appearance requirements, and state whether critical dimensions apply before or after treatment.
What determines the cost and lead time?
Material and stock availability, quantity, geometry, setup count, machining time, tolerance, finishing and documentation all influence a quotation. Share the required date and any flexible requirements so practical alternatives can be reviewed.
Can you machine plastic as well as metal?
Yes. Options include engineering plastics such as POM, PEEK, Nylon, PTFE, ABS and PC. Grade, moisture absorption, thermal behavior and workholding need to be considered alongside the final dimensions.
How are revisions and repeat orders handled?
Send the approved revision and clearly identify any changes to the model, drawing, material or finish. Confirm which files govern the new order and whether previously approved requirements still apply.
Let’s Make Your Next Part
Send your CAD model, drawing and project requirements. Our team will review machining, material, finishing and delivery with you.