Reverse Engineering & Precision CNC Machining in Kaukauna, WI

Introduction to Our Reverse Engineering and Machining Capabilities

4M Machine LLC is a trusted, family-owned machine shop in Kaukauna, Wisconsin, serving local and nationwide clients with a full range of machining services. For more than 20 years as 4M Machine—and built on over 60 years of combined precision machining expertise—we’ve specialized in reverse engineering, CNC machining, and custom fabrication that keeps businesses running.

When a part fails, drawings are missing, or OEM support is unavailable, our reverse engineering process restores function quickly. Our precision CNC machining ensures every detail is replicated with accuracy, from prototypes to full production runs. With investments in advanced machining equipment, we deliver the tight tolerances and surface finishes required in industries such as aerospace, automotive, oil and gas, heavy manufacturing and food industry.

Our team is skilled at working with a wide range of materials, including aluminum, mild steel, high-carbon steels, stainless steel, brass, bronze, nylon, and most common plastics. From large components up to 200 inches on our boring bar to intricate details down to one-half inch on our vertical machining center, we handle projects of virtually any size.

Why Reverse Engineering and Precision Machining Matters

Downtime is costly. When a part breaks, waiting weeks for OEM replacements—or discovering the part is obsolete—can bring production to a standstill. Reverse engineering bridges that gap by creating accurate documentation of the original component, including geometry, material, and tolerances. From there, precision machining transforms the concept into a replacement part that restores performance fast.

For manufacturers, this process isn’t just about fixing problems—it’s about improvement. Reverse engineering makes it possible to redesign parts for longer service life, better efficiency, or easier maintenance. Combined with precision CNC machining, the result is a reliable, repeatable solution that keeps equipment working better and longer.

Whether you need a single prototype, a repaired component, or a full production run, 4M Machine provides the expertise, technology, and craftsmanship to deliver consistent results.

How 4M Machine Can Help

Bring us a worn part, a failed component, or even just a rough idea. Our process begins with careful measurement and documentation, including material verification and dimensional analysis. We then create or refine drawings, program CNC equipment, and select tooling to achieve the exact finish and tolerances required.

For large parts, our boring bar handles components up to 200 inches. For smaller precision work, our vertical machining center produces accurate details down to half an inch. Every job is backed by decades of shop-floor experience, combined with modern equipment that ensures quality at scale.

When moving from prototype to production, we validate every detail with sample runs and consistent fixturing. This allows us to maintain accuracy across batches and reduce lead times. Whether it’s one part or thousands, we focus on delivering performance-driven results.

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