NDA Available
Engineering Review
Global Delivery
Dimensional Control
Custom CNC machining is planned around the dimensions, datums, and feature relationships that determine how a part fits and functions. Inspection requirements are considered before production begins.
CNC Machining Services
CNC Machining for Complex Custom Parts
GD Prototyping provides custom CNC machining for prototypes and low-volume production. Our CNC machining service combines engineering review and process planning to help reduce avoidable rework while producing complex metal and plastic parts to controlled tolerance and surface requirements.
- NDA Available
- Engineering Review
- Global Delivery
What is CNC Machining
CNC machining is a subtractive manufacturing process. Computer-controlled cutting tools remove material from metal or engineering-plastic stock to create parts from CAD data, including defined profiles, holes, pockets, threads, and other functional features.
Depending on part geometry and feature access, the process may use CNC milling, CNC turning, or 5-axis CNC machining. Material, tolerances, quantity, and surface requirements then guide the final process route.
CNC Machining Capabilities
Complex Features & Tool Access
CNC milling, CNC turning, and 5-axis CNC machining can be matched to part geometry, tool access, and setup requirements, helping reduce unnecessary repositioning and protect feature relationships.
Repeatable Process Control
Programming, setup decisions, and inspection checkpoints are aligned to keep dimensions and surface condition consistent across prototype parts, repeat orders, and small production runs.
Prototype to Low-Volume Production
Support prototype validation and small batch CNC machining with a process route that can be reviewed as quantity, tolerance, and delivery requirements change.
Metals & Engineering Plastics
Choose metals or engineering plastics according to strength, weight, wear, temperature, and surface requirements. Material selection is evaluated together with geometry and process planning.
Included Services
CNC Milling
For prismatic parts with contours, pockets, drilled features, and precisely machined interfaces
5-Axis CNC Machining
For multi-sided parts with complex geometry, angled features, and challenging tool access
CNC Turning
For rotational parts with turned profiles, bores, threads, and precision mating interfaces
How It Works
How Our CNC Machining
Service Works
Upload Files
Send 3D CAD files, 2D drawings where needed, material, quantity, finish, and any critical dimensions or inspection requirements.
Engineering & DFM Review
We assess geometry, datum strategy, tool access, material, tolerance callouts, and surface requirements to identify manufacturability risks before release.
Process Plan & Quote
Receive a project-specific quotation with the proposed CNC machining route, applicable finishing steps, lead-time estimate, and assumptions requiring confirmation.
Program & Machine
After approval, we program and machine the part using CNC milling, CNC turning, 5-axis CNC machining, or combined operations selected for the geometry and feature access.
Inspect Critical Requirements
We verify the agreed critical dimensions, feature relationships, surface condition, material requirements, and requested documentation before release.
Pack & Deliver
Parts are packed to suit their geometry and finish requirements, then shipped with project communication through delivery.
Supported Materials
Metals
Lightweight, corrosion-resistant aluminum for CNC-machined prototypes, brackets, housings, and precision parts.
Aluminum 6061Aluminum 6063
Aluminum 6082
Aluminum 7075
Aluminum 5052
Aluminum 2024
Plastics
Impact-resistant ABS for machined prototypes, housings, fixtures, and functional appearance parts.
General-Purpose ABSMachine-Grade ABS
Flame-Retardant ABS
Black ABS
Natural ABS
Supported Surface Finishes
As Machined
CNC machined surfaces retaining tool marks without additional cosmetic finishing.
Anodizing
Protective oxide finishes for aluminum parts, with clear or colored options.
Sand Blasting
Abrasive blasting for matte textures and metal surface preparation before coating.
Passivation
Removes free iron contamination from stainless steel to support corrosion resistance.
Black Oxidize
Black conversion finishes for compatible steel, with oil or wax sealing.
Electroless Plating
Chemically deposited metal coatings with relatively uniform thickness on compatible, prepared surfaces.
Polishing
Mechanical polishing for smoother surfaces and satin, bright, or mirror finishes.
Powder Coating
Cured powder coatings for metal parts, with varied colors and textures.
Applications
Advantages
Why Work with GD Prototyping?
GD Prototyping brings engineering judgment, flexible production support, and clear technical communication into one manufacturing partnership. This helps teams make practical sourcing decisions and maintain continuity as a part moves from validation to repeat demand.
Engineering Partnership
We help teams weigh geometry, material, tolerance priorities, and application needs before committing to a production route.
Production Flexibility
Support prototype builds and small batch CNC machining without forcing the program into a fixed volume model too early.
Multiple CNC Routes Under One Partner
CNC milling, CNC turning, and 5-axis CNC machining can be coordinated under one supplier as part geometry and access requirements change.
Material & Finish Coordination
Metals, engineering plastics, and surface finishes can be considered together so the selected part solution fits its functional and appearance requirements.
Decision-Ready Communication
Clear technical feedback on assumptions, trade-offs, and open requirements helps purchasing and engineering align before approval.
Repeat-Order Continuity
Agreed part requirements and manufacturing decisions provide a consistent reference when demand grows or repeat orders are released.
FAQ
CNC Machining FAQs
What CNC machining services do you provide?
We provide custom CNC machining through CNC milling, CNC turning, and 5-axis CNC machining, with finishing and inspection support where required.
What files are needed for a CNC machining quote?
Please send a 3D CAD file and, where needed, a 2D drawing with material, quantity, tolerances, threads, and finish requirements.
Can you machine metal and plastic parts?
Yes. CNC machining is available for metals and engineering plastics, including aluminum, steel, stainless steel, brass, copper, titanium, ABS, POM, PC, and PEEK.
How do I choose between CNC milling, turning, and 5-axis machining?
CNC milling suits prismatic parts and machined features. CNC turning suits rotational parts. 5-axis CNC machining suits complex multi-sided or angled features.
Is CNC machining suitable for prototypes and low-volume production?
Yes. CNC machining is well suited to functional prototypes, validation parts, and low-volume production where part requirements may still evolve.
After-Sales Support
Our commitment does not end at delivery. We provide comprehensive after-sales support to ensure your satisfaction and long-term success.
Engineering Follow-Up
Ongoing technical support to address questions and improve future designs.
Quality Issue Response
Rapid investigation and corrective action to resolve any quality concerns.
Inspection Reports
Detailed inspection reports and certificates available with every order.
Process Continuity
Documented processes and tooling management ensure consistency for repeat orders.
Packaging & Logistics Support
Secure packaging and logistics coordination across orders.
Quick Reorder Support
Easy reorder process and manufacturing communication.
Ready to machine
your next part?
Get precision CNC machining for prototypes and production parts with fast lead times, competitive pricing, and exceptional quality.
- Expert Support
- Fast Turnaround
- Quality Assured
Fast Turnaround
Quality Assured