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Over Four Decades Of Experience
Since our founding, we've committed ourselves to precision engineering and honest partnerships with every client who walks through our door. We do not cut corners on quality, and we do not settle for anything less than robust solutions designed to last.
Where it all began
The Christopher Stephen Corporation was founded with a single vision: build machines that solve manufacturing challenges. We started small, with a team of engineers who believed precision mattered more than shortcuts.
1974 - The Idea Takes Shape
Before there was a company, there was a problem to solve. While working as a salesman in hydraulics at Neff, Steve Ronsheim built his first log splitter by hand, not to sell, but because he needed one. That machine, assembled in Millhousen, Indiana, was the beginning of everything.
1977 - Robush Is Born
With a startup loan from his stepfather, Kenny Bush, and a building behind the house, equipped with CNC, welding, and machining tools, Steve founded Robush (a blend of Ronsheim and Bush). The company built log splitters in season and custom machinery in the off-season, selling to names like Borg Warner and reaching customers as far as Hawaii and Alaska.
1983 - Rebuilt From The Ground Up
The recession of 1983 hit hard and stopped all sales. The bank repossessed the building. Steve resubmitted a financial plan, got the loan back, moved to Napoleon, Indiana, and rebuilt from scratch. The log splitting market had dried up, so the company pivoted fully to industrial machinery with assembly lines for Borg Warner, presses for Cummins, and more.
1984 - Ronsheim Engineering
With the log splitter chapter behind him and industrial clients in place, Steve and Andy formalized the engineering identity: Ronsheim Engineering was created, with Steve as the sole designer, fully focused on building one-of-a-kind machinery.
1986 - The Name Change That Stuck
Paula Ronsheim joined the company in 1986, and the team learned AutoCAD by sitting alongside two high schoolers who already knew it. In 1987, after a brief stint at Sytech, Steve returned to work for himself and renamed the company The Christopher Stephen Corporation (TCSC) in honor of Steve and Andy's son - the name it carries today.
1992 - A Building Of Our Own
TCSC built its permanent facility - a machining floor and office, staffed entirely by family (six employees). It was a turning point from scrappy startup to established operation.
1997 - The Mercedes Job
A landmark Borg Warner contract arrived: an assembly line for transfer cases destined for Mercedes-Benz vehicles. The scope of the project justified a full building expansion, and TCSC welcomed its first Haas CNC machines equipped with Mastercam software - setting a new standard for precision manufacturing capability.
2008 - Embracing Robotics
TCSC integrated its first 6-axis robot - a signal of the company's commitment to staying at the leading edge of manufacturing technology. As Steve put it, the mission hasn't changed, but "technology changes big time, and you have to stay on top of it."
2025 - Expanding The Footprint
A new building expansion in 2025 marked the latest chapter - more capacity, same standard of precision that has defined TCSC for nearly five decades.
Meet The Owners
Engineers and integrators with real experience solving real problems.
Steve started with a vision and his wife, Andy, in 1984 and built something that endures.
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Keeps the business sound and the operation running, every day for nearly four decades.
Leads with hands-on technical depth and holds the team to a standard that shows in every build.
Leads business development while remaining actively involved throughout each project, from initial concept through installation and startup.
Certified to build at the highest standard
Recognized credentials that back the work on our floor.
TCSC is a FANUC Authorized System Integrator - part of the industry's largest and most rigorously vetted network of robotic automation providers. The designation means our team is trained and certified by FANUC America to design, program, and integrate FANUC robots into custom production systems.
Ready to build something better?
Let's talk about your project and how we can solve your manufacturing challenges.
