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What We Do
Gromax delivers full-service manufacturing support—from initial concept through high-speed production.
Whether you’re designing complex metal parts or sourcing ultra-precise stampings, we bring it all together under one roof.
Engineering Design & Pre-Production
Our engineering team works alongside yours to optimize designs, prevent downstream issues, and ensure every part is built for performance and manufacturability.
RAPID PROTOYPING
Bring your concepts to life with functional, high-fidelity prototypes built using the same tools, materials, and tolerances as full production.
Tool & Die Design + Manufacturing
We design and build Class A progressive, compound, and Bihler dies in-house—engineered to deliver tight tolerances, high uptime, and long-term value.
PRECISION METAL STAMPING
From micro-formed components to dual-material busbars, Gromax delivers high-volume stamped parts with unmatched repeatability and in-die process integration.
Assembly & Secondary Operations
We go beyond stamping by offering in-house value-added operations that finish, assemble, and prepare your parts for the next step in your supply chain.
Quality Assurance & Lifecycle Support
From first article to full-scale production, Gromax ensures your parts meet the highest standards—backed by certified inspection and proactive tool maintenance programs.
Why Trust Gromax
Precision You Can Trust
We manufacture parts with tolerances as tight as ±0.0001″ (2 microns), supporting high-reliability programs in aerospace, medical, electronics, and power systems.
End-to-End Tooling & Stamping Integration
From CAD to press line, we keep everything under one roof—minimizing lead time, maximizing control, and simplifying your supply chain.
ITAR Registered & CAGE Code Verified
ITAR registered and listed under CAGE Code 77J36, making us a trusted partner for U.S. defense and aerospace manufacturing programs.
ISO 9001:2015 Certified
Certified to ISO 9001:2015 (Certificate #G022818), ensuring traceability, process discipline, and confidence in every part we produce.
Made in the USA
All design, tooling, stamping, and quality processes are done in our Wisconsin facility—using U.S.-sourced materials for faster turnaround and tighter compliance.
99.68% On-Time Delivery, 0.066% Defect Rate
99.68% On-Time Delivery, 0.066% Defect Rate
We know your production schedule depends on ours. Our systems, tooling practices, and team culture are built to keep yours running.t
Not Sure Where to Start?
Tell us where you are in your product development journey—we’ll point you to the right team or solution.