Aluminium Machined Parts
Resolute Precision Manufacturing CNC turns and mills precision aluminium components across the full range of common aluminium alloys, from prototype quantities through established production volumes. Aluminium’s combination of light weight, good machinability, and strong strength-to-weight ratio makes it the most requested material across our turning and milling programs for housings, brackets, structural components, and precision hardware. Request a QuoteWhy Aluminium Is Machined So Widely
Aluminium removes material quickly and predictably compared to steel and stainless, which keeps cycle time and cost down while still holding tight tolerances. It also accepts a wide range of finishing options anodize, chromate conversion, powder coat that improve corrosion resistance and appearance without adding significant weight. For applications where weight matters as much as strength, aluminium is frequently the first material considered.
Our Services
Aluminum Alloys We Machine
- 6061-T6 — the general-purpose workhorse alloy — good machinability, good corrosion resistance, weldable, anodizes well
- 7075-T6 — the highest-strength common aluminium alloy — used where 6061 does not have sufficient strength, at somewhat reduced corrosion resistance
- 2024-T3 — high strength with good fatigue resistance — common in aerospace structural components; anodizes with reduced corrosion resistance versus 6061
- MIC-6 cast aluminium plate — stress-relieved cast tooling plate with excellent flatness — used for tooling plates, fixtures, and base plates
- 5052 — good formability and corrosion resistance — common in sheet metal and lightly loaded structural parts
Finishing Options for Aluminium Parts
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Machined aluminium parts are frequently finished to improve corrosion resistance, surface hardness, or appearance. RPM coordinates the full range of aluminium-appropriate finishes through our outside operations network, including Type II decorative anodize, Type III hard coat anodize, chromate conversion, and powder coat, with layer thickness and dimensional build accounted for during design.
Specifications
| Turning |
Swiss CNC (20mm–38mm); chucked turning to 25.5″ diameter |
| Milling |
3, 4, 5-axis vertical milling up to 20″×50″; horizontal 4th-axis |
| Tolerances |
Routinely ±0.001″; ±0.0005″ achievable on critical features |
| Alloys |
6061-T6, 7075-T6, 2024-T3, 5052, MIC-6 cast plate |
| Finishing |
Type II/III anodize, chromate conversion, powder coat — coordinated |
| Quality |
ISO 9001:2015; material traceability; first article inspection on request |
| Volume |
Prototype through production quantities |
Frequently Asked Questions
Which aluminium alloy should I specify for my part?
6061-T6 is the right default for most parts good machinability, weldable, and it anodizes cleanly. Move to 7075-T6 only where the added strength is needed, since it costs more and anodizes with a duller finish. We’re happy to review your application and recommend an alloy during quoting.
Does RPM anodize aluminium in-house?
We coordinate anodizing through our qualified outside coating network rather than performing it in-house, and manage the process end-to-end so you receive finished, anodized parts from a single purchase order.
Can RPM hold tight tolerances on thin-wall aluminium parts?
Yes, with appropriate fixturing and machining strategy to manage material deflection during cutting. Thin-wall aluminium housings are a routine part type for us discuss wall thickness and tolerance requirements during quoting so we can plan fixturing accordingly.
What is the difference between 6061 and 7075 for machined parts?
6061 machines more easily, welds, and anodizes with better corrosion resistance. 7075 is roughly twice the strength of 6061 but machines somewhat harder, does not weld well, and anodizes with reduced corrosion resistance. Choose 7075 when strength-to-weight is the driving requirement.