CNC precision machining that meets the highest standards

At ACI Industries, we specialize in CNC precision machining that meets the highest standards of performance, repeatability, and speed.

From our advanced facility in Mequon, Wisconsin, we support customers nationwide with expertly machined metal and plastic components—from concept to full production.

As a trusted Tier 1 supplier, we bring together tight-tolerance machining, responsive lead times, and deep engineering collaboration to help you meet specs, scale up production, and stay ahead of schedule.

ACCURACY

High-precision CNC machining

Full-spectrum CNC machining services

Our in-house capabilities are built to handle complexity, volume, and customization with ease. Whether you need prototype support or thousands of repeat parts, ACI delivers with:

Tight-tolerance CNC machining down to ±0.0005″
CNC milling and turning for complex geometries and production runs
Flexible batch sizes, from short-run to high-volume output
Full prototype-to-production scalability
Trusted Tier 1 experience serving U.S. manufacturers across industries

Our core capabilities

CNC Milling
We offer a complete range of CNC milling services—from automated 5-axis machining for advanced contours to 3-/4-axis vertical and horizontal milling and 2-axis setups for straightforward, efficient part production.

CNC Turning
Our turning centers feature 4-axis bar-fed and chucked systems, ideal for producing cylindrical parts, threaded components, and complex turned profiles at scale.

CAD/CAM Design & Programming
Our experienced engineers create machine-ready models, optimize toolpaths, and plan fixturing and setups that reduce cycle times and improve part consistency—especially in multi-axis environments.

Quality that’s built in

At ACI, quality isn’t an afterthought—it’s engineered into every step. We utilize Hexagon CMMs, in-process probing, and laser tool measurement to verify precision and repeatability throughout production. Whether we are machining to customer specifications or strict industry standards, we ensure every part is delivered to print—with full documentation available upon request.

Value-added services

We go beyond machining to support your project from start to finish:

Tier 1 Manufacturing Solutions: One-stop planning, machining, and delivery
Solutions Engineering: We consult, refine, and improve parts for manufacturability
Outside Service Support: Work with outside partners to source castings, forgings, finishes, mechanical hardening, and coatings
Surface Treatments: In-House Black Phos and Hard Anodizing process line
Custom Fixtures & Tooling: Built fast in the material that matches your application
Prototyping & Specialty Machining: Fast, reliable concept-to-part development
Assembly & Packaging: Can provide scalable solutions for part assembly and kitting
Surface Grinding & Embossing: Fine finishes, flatness control, and logo/text features

The ACI advantage

For over two decades, ACI has helped customers bring precision-engineered parts to market faster—with fewer delays and zero compromise on quality. From rapid prototyping to Tier 1-level production support, we’ve earned our reputation by doing the job right—and doing it fast.

Let’s build it right—the first time

Whether you need a single precision prototype or high-volume manufacturing support, ACI Industries is your trusted CNC machining partner. We bring together advanced technology, responsive service, and decades of experience to help you deliver parts that perform.

ACI Industries: A HAYES brand

Demand Precision

Let’s talk CNC machining—from prototype to production.

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CNC Machining