Riverstone Machining LLC is a family-owned technical contract manufacturer of precision machined components located in Fox Lake, Wisconsin. In 2010, Integrity Machine Corporation, who had a long-standing reputation of offering quality parts to customers throughout southeastern Wisconsin since 1995, was purchased and became part of the Riverstone family.

In November of 2019, the assets of Metal Solutions, Inc in Sun Prairie, WI were acquired and, within two years, construction on a 30,000 sq ft addition began on the Fox Lake property. The new manufacturing and office areas were unveiled in 2023, bringing our total square footage to 60,000. The Sun Prairie operation was then moved to Fox Lake to house all production operations under one roof.

Riverstone Machining LLC currently employs thirty-five people working two shifts daily. We provide a wide range of precision computer numerical control (CNC) machining and are equipped with the latest and most technically advanced equipment. This technology, coupled with decades of manufacturing experience, allows us the capability to meet any custom, production, turning and milling needs. We are committed to deliver competitively-priced, quality parts when you need them.