Aluminum CNC Machining Services
Custom aluminum CNC machining services for prototypes and production. Advanced 3, 4, and 5-axis milling capabilities with fast turnaround times and competitive pricing.
Aluminum Machined Prototypes and Custom Part Production
RpProto is a reliable 3-axis and 5-axis aluminum CNC machining service supplier. Our service include CNC milling, CNC lathe, CNC turning, EDM, plus anodizing surface treatment. We can machine complex parts with tight tolerances. We have comprehensive knowledge of the CNC machining needs for specific aluminum and cutting-edge facilities. RpProto can help you with your demands, whether you need an intricate part created from a 3D drawing or want the finished product displayed at a high-level conference.
Finely machined aluminum parts are now commonly used in industrial, medical, and aeronautical engineering. It would help if you worked with a skilled aluminum machining services provider like RpProto due to the importance of the applications where aluminum components are used.
Our Aluminum CNC Machining Capabilities
CNC Milling Services
RpProto provides high-precision CNC milling services for prototype, small-batch production, and large-scale manufacturing.
Our machine workshop has a fleet of CNC milling machines with three, four, and five axes that can produce elaborate and sophisticated parts.
- 3-axis, 4-axis, and 5-axis milling
- Complex geometries and tight tolerances (±0.005")
- Ideal for housings, brackets, enclosures
CNC Turning Services
We provide precise CNC turning services for various spare components in multiple sizes. We can offer threading, drilling, tapping, shape turning, etc., due to our wide range of turning machining equipment and capabilities. It is appropriate for both high-volume manufacturing and prototyping.
- Precision cylindrical parts
- Shafts, bushings, fittings
- Threading and drilling capabilities
Aluminum Alloys We Machine
RpProto offers several aluminum alloys, such as Aluminum 7075, Aluminum 2024, and Aluminum 6061.
Most popular, excellent machinability, corrosion resistance
Aluminum 6061 is the most widely used class of aluminum. It is characterized by excellent machinability and weldability, good toughness, and moderate to high strength. The primary alloying elements are magnesium and silicon.
This aluminum alloy is commonly used to produce electrical fittings, brake pistons, and bike frames. Aluminum 6061-T651 is frequently utilized in the aerospace, automotive, and construction industries.
Aluminum 6063 differs slightly from 6061. This aluminum alloy is not as strong but offers better formability, making it well-suited for pipes, railings, and extrusions.
It has mechanical characteristics that include ease of welding, heat treating, and durability. This alloy is frequently used in applications such as door frames, glass panels, sign frames, and roofing.
Aluminum 7075 has excellent fatigue resistance, making it perfect for applications exposed to cyclic loading such as aircraft wings and airframes, bicycle parts, mountain climbing gear, meter shafts, gears, and aircraft fittings. However, it is challenging to weld.
Aluminum 7075-T6 and 7075-T651 are aerospace-grade materials with an outstanding strength-to-weight ratio, and their strength and hardness are comparable to steel. T651 refers to the temperature of Aluminum 7075.
Aluminum 2024 alloy has good resistance to fatigue and is quite machinable, but it has poor weldability. It is a popular choice for aerospace and military surveillance.
Aluminum 2024-T3 is commonly used for bolts, aircraft fittings, and pistons. It is not highly resistant to corrosion, so it needs surface treatments if used in harsh environments.
The Aluminum 5052 alloy utilizes magnesium as its primary alloying element. It is highly corrosion-resistant and can be welded, but it cannot be heat-treated. This type of aluminum is commonly used in fuel tanks, sheet metal parts, and fuel/oil lines.
Aluminum 5052 is easy to punch, bend, and shear into the desired forms, making it suitable for constructing machine parts and for use in saltwater conditions. It is well-suited for marine, sea, and industrial settings.
| Model | Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | Hardness (Brinell) | Density (g/cm^3) |
|---|---|---|---|---|---|
| Aluminum 2024-T3 | 345 | 138 | 18 | 120 | 2.78 |
| Aluminum 5052-H32 | 193 | 117 | 12 | 60 | 2.68 |
| Aluminum 6061 | 276 | 96.5 | 17 | 95 | 2.7 |
| Aluminum 6063 | 214 | 68.9 | 12 | 73 | 2.7 |
| Aluminum 7050 | 490 | 160 | 11 | 147 | 2.83 |
| Aluminum 7075 | 503 | 159 | 11 | 150 | 2.81 |
| Aluminum MIC-6 105 | 105 | N/A | 3 | 65 | 2.7 |
Finishing Options and Post-Processing
RpProto offers a wide range of surface finishes suitable for aluminum machined parts. It improve the wear resistance and the corrosion resistance, and enhance the overall appearance.
Form a dense clorful film on the surface of anodized aluminum for additional protection. used to enhance aluminum parts’ resistance to corrosion and wear.
- Enhanced corrosion and wear resistance
- Available in multiple colors
- Improved aesthetics and durability
Powder coating finish is strong, durable, attractive, and applicable to different surfaces.
- Durable, uniform finish
- Wide color selection
- Excellent protection
Blasting the aluminum surface using a pressurized fluid mixed with sand material providing an extensive range of textures.
- Smooth, matte finish
- Surface preparation
- Uniform appearance
Polishing aluminum surface to achieve a smooth surface.
- Mirror-like finish
- Aesthetic applications
- Military and aerospace standard
- Corrosion protection without appearance change
- Natural aluminum appearance
- Cost-effective option
Why Choose RpProto for Aluminum CNC Machining?
Precision & Quality
- Tolerances as tight as ±0.005″ (±0.127mm)
- ISO 9001:2015 certified
Expert Engineering Support
- Design for manufacturability (DFM) feedback
- CAD file review and optimization
- Multi-axis capabilities
Fast Turnaround
- Rapid prototyping in as fast as 1-3 days
- Production runs available
Competitive Pricing
- Transparent, instant online quotes
- No hidden fees
Industries We Serve
Aluminum parts are extensively utilized across various industries, including automotive, aerospace, industrial equipment and machinery, and consumer and computer electronics. Examples of applications include:
Automotive
Engine components, transmission parts, lightweight structures
Medical Devices
Surgical instruments, equipment housings, diagnostic tools
Robotics & Automation
Frames, brackets, precision components
Electronics
Heat sinks, enclosures, chassis
Case Study: CNC Machining of Complex 6061 Aluminum Component
Project Overview
The design includes multiple curved surfaces (curved surfaces), inclined planes (sloping surfaces), and deep internal grooves.
Material: 6061 Aluminum alloy.
Manufacturing Process:
Stage 1: Roughing: 3-axis CNC machining for initial material removal and “opening up” the general shape.
Stage 2: Finishing: 5-axis CNC machining performs the precision finishing on the front and side profiles to ensure geometric accuracy of the complex curves.
Stage 3: Specialized Internal Machining: To process the internal grooves and large bores, customized cutting tools and contoured fixtures (profile-based positioning clamps) are utilized to maintain stability and alignment.
Cost Analysis & Volume Pricing
The cost of this part is driven by high complexity, long machining cycles, and intricate craftsmanship.
| Quantity | Price per Unit | Notes |
|---|---|---|
| 1 Unit (Prototype) | ~$600 | High setup and programming overhead. |
| 200 Units (Batch) | ~$180 | Significant reduction due to shared setup. |
The dramatic per-unit drop from $600 to $180 comes from amortizing fixed setup and programming costs across more parts — the machine time per piece stays roughly the same, but the one-time setup overhead is divided by 200 instead of 1. Learn how volume, material choice, tolerances, and other variables interact in our detailed guide to CNC machining cost factors.
The RpProto Process
Upload Design
Upload your CAD files (STEP, IGES, STL) for instant quote with automated DFM analysis and material recommendations.
Review & Approve
Receive engineering feedback, design optimization suggestions, and transparent pricing within 12 hours.
Manufacturing
Precision CNC machining by experienced machinists using advanced equipment and optimized toolpaths.
Quality Inspection
Comprehensive dimensional verification, CMM inspection, and quality documentation for full traceability.
Delivery
Fast, secure shipping to your location with tracking and delivery confirmation.
RpProto is your one-stop solution for high-quality parts; from prototype to end-part assembly, we offer on-demand machining & manufacturing that is simple & quick.
STL | STEP | SLDPRT | IGS | IPT | PRT | SAT files
FAQs
The cost of CNC machining aluminum depends on the complexity and size of the part, as well as the type of aluminum used. These factors influence the type of machine needed, the production time, and the raw material cost.
To save on machining an aluminum alloy part, it’s best to follow design for manufacturing principles to reduce the use of challenging-to-machine features.
In aluminum CNC machining, as tolerances get tighter, the “margin for error” disappears. Achieving high precision requires slower machining speeds, more frequent tool changes to prevent wear-induced errors, and more sophisticated inspection equipment.
Based on the example in the video, here is how the cost scales:
- Loose Tolerance (0.1 mm): ~ Base price
- Tight Tolerance (0.02 mm): ~ 50% increase
- Ultra-Precision (0.005 mm): ~ 300% increase from base
The material choice (like 6061 vs. 7075 aluminum) affects how well a part holds a tolerance. 7075 is harder and more stable for ultra-high precision (0.005 mm), but it is more expensive. 6061 is more cost-effective for standard tolerances (0.1 mm).
The most effective strategy is Selective Tolerancing:
Critical Dimensions: Use 0.02 mm or 0.005 mm only for surfaces that interface with other parts (e.g., bearing holes or mating surfaces).
Non-Critical Dimensions: Use 0.1 mm or even 0.2 mm for the overall shape, chamfers, and aesthetic features. This allows the machinist to run the machine faster, keeping cost lower.