CNC Machining

Precision Machined Castings from a Vertically Integrated Aluminum Foundry

At Stahl Specialty Company, precision is more than a promise—it’s our process. As one of the largest permanent mold aluminum foundries in the United States, Stahl delivers unmatched CNC machining capabilities for your aluminum castings. With over 70 years of aluminum casting expertise and an integrated CNC machine shop featuring 80+ advanced machining centers, we provide a complete solution for your machined aluminum casting needs—from tooling to finished assembly.

Whether you’re producing 5,000 units or 5 million, Stahl delivers the repeatability, reliability, and responsiveness your project demands—all under one roof.

When speed, accuracy, and accountability matter, Stahl delivers. Our fully integrated CNC machining department allows us to maintain strict control over your aluminum components’ critical dimensions and timelines. From raw casting to final assembly, we streamline your production process by removing unnecessary vendor coordination and eliminating quality silos.

• 3-, 4-, and 5-axis CNC machining
• Precision tolerances down to ±0.002”
• Complex multi-operation assemblies
• Parts up to 300 lbs
• Full fixture design and in-house tooling support
• Real-time inspection and CMM validation
  

By keeping casting, machining, and quality assurance in-house, we simplify your supply chain while enhancing part consistency and cost efficiency. Our high-capacity CNC machine shop features top-of-the-line equipment from MAZAK, Mori Seiki, and other leading manufacturers, ensuring world-class performance on every part we produce.

At Stahl Specialty, we don’t just machine aluminum castings—we build long-term partnerships grounded in technical collaboration, transparency, and performance. Our deep in-house integration allows our team to engage early in your engineering process, helping you optimize part design for manufacturability, cost, and performance.

Design engineers and casting buyers are often constrained by time and complexity. With Stahl, one call connects you to a complete permanent mold aluminum casting solution—including in-house CNC machining, core making, heat treating, and assembly. This end-to-end control means fewer handoffs, fewer delays, and faster delivery of precision-machined components ready for the production line.

Whether you’re scaling from prototype to production or maintaining long-running legacy programs, Stahl’s CNC machining department is built to handle your needs. With experience in volumes ranging from a few thousand to several million parts, we serve a wide array of high-demand industries with consistent, high-precision results.

We thrive where other shops fall short. Stahl is uniquely equipped to produce intricate machined aluminum castings with tight tolerances, complex geometries, and multi-operation assemblies. Our vertical integration—from tooling and casting to final machining—gives us unmatched visibility into your part at every step of the process.

For over seven decades, Stahl Specialty Company has delivered precision aluminum castings to the most demanding industries in the world. As an ISO 9001:2015 certified aluminum foundry and CNC machine shop, quality is baked into every part we produce. We support everything from lightweight housings to robust structural castings weighing up to 400+ pounds.

Stahl combines deep engineering expertise with the flexibility to deliver custom solutions at scale. Our precision machined castings are trusted across industries where performance, compliance, and repeatability are non-negotiable.

When you partner with Stahl, you gain access to far more than a CNC machine shop. Our vertically integrated aluminum foundry is built to support complex, high-volume manufacturing programs with speed and precision. With all key processes under one roof, we eliminate delays and reduce variability—helping you bring better parts to market, faster.

• Permanent and semi-permanent mold aluminum casting
• CNC machining (3-, 4-, 5-axis)
• Tool and fixture design
• Core making (shell and SO₂)
• Heat treating
• X-ray, dye penetrant, and leak testing
• Impregnation and grind shop
• CMM inspection and laser scanning
• Mechanical assembly and packaging
  

Stahl also operates the largest fleet of 48” x 60” rotary casting machines in the U.S., allowing us to produce castings at volumes and dimensions few others can match. Whether your need is high-volume HVAC housings or mission-critical components for robotics or heavy equipment, we’re equipped to deliver.

Stahl’s CNC machining and aluminum casting capabilities support a diverse portfolio of customers who demand reliability and precision at scale. We are a preferred supplier across industries such as:

Stahl Specialty Company is committed to being the world’s best aluminum casting supplier—through innovation, value creation, and a relentless focus on quality. When you choose Stahl for CNC machining, you’re choosing a partner who owns the process from start to finish.

Our team is ready to support your next program with insight, engineering support, and the production power to keep you ahead of schedule and under budget.

Ready to simplify your supply chain and boost part performance?  Contact us today at sales@stahlspecialty.com or call (816) 597-3322 to speak with a CNC Machining expert.