Best Aluminum CNC Machining Shops
Aluminum is the most widely machined metal in precision CNC shops, valued for its excellent machinability, high strength-to-weight ratio, and versatility across industries from aerospace to consumer electronics. Grades 6061-T6 and 7075-T6 dominate the market, with 2024, 5052, and 6082 used for specialized applications. The shops listed here have documented aluminum machining capability, offering everything from quick-turn prototypes to high-volume production runs with anodizing and other finish options.
Why these suppliers?
- ✓Aluminum machines efficiently at high speeds and feeds, but quality shops know that surface finish, chatter avoidance, and fixturing for thin-walled parts require real expertise — not just any shop with a VMC.
- ✓These shops offer the full aluminum workflow: machining, anodizing coordination, chromate conversion, and dimensional inspection — reducing the number of vendors you need to manage.
- ✓Whether you need 10 prototype brackets or 10,000 production housings, the listed shops cover the full volume range with documented aluminum machining programs.
1 verified supplier found
Allentown, Pennsylvania
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Frequently Asked Questions
What aluminum grades are most commonly CNC machined?
6061-T6 is the most common aluminum alloy for CNC machining, offering a good balance of strength, corrosion resistance, machinability, and weldability. 7075-T6 is used where higher strength is required (aerospace structures, firearms, high-stress brackets) but is harder to machine and more prone to stress corrosion in certain environments. 2024-T3 is preferred for aerospace fatigue-critical applications. 5052 and 5083 are common for marine and weldment applications.
What surface finishes are available for aluminum CNC parts?
Common finishing options for aluminum machined parts include Type II (clear) and Type III (hard coat) anodizing, which improve surface hardness and corrosion resistance; chromate conversion coating (Alodine/Iridite) for electrical conductivity with corrosion protection; powder coating and paint for decorative finishes; and Teflon (PTFE) or electroless nickel plating for specific functional requirements. Most aluminum machine shops coordinate finishing with local vendors or offer in-house anodizing.
How quickly can I get aluminum CNC prototype parts?
Many CNC shops offer 2–5 business day quick-turn aluminum prototyping for simple geometries. More complex parts with tight tolerances, multiple setups, or first-article inspection requirements typically take 1–2 weeks. When requesting quotes, clearly state your timeline requirement — shops that cannot meet your deadline will tell you upfront, and many have rush services available at a premium.