CORE Industrial Partners, Chicago, a private equity firm, has acquired Cal-X, Inc., Grafton,Wisconsin,a provider of precision machining and sheet metal fabrication rapid prototyping services, by CORE portfolio company Prototek, Contoocook,New Hampshire. Financial terms of the transaction were not disclosed.

Cal-X offers rapid prototyping and short-run production services through its wide breadth of in-house capabilities. The company’s key capabilities include CNC milling & turning, laser & waterjet cutting, and painting & silk screening.

Bill Gress, CEO of Prototek, said, “The acquisition of Cal-X represents another great example of our commitment to building a leading rapid prototyping service provider. We specialize in delivering the impossible and now we will bring this service on a nationwide scale. Cal-X rounds out our portfolio of capabilities and services that places us as the logical choice of rapid prototype providers.”

Monroe Capital LLC provided financing for the acquisition. Winston & Strawn LLP provided legal representation to CORE and Prototek in the transaction.