Since Leonhard Kellenberger founded the company in 1917, Kellenberger has built its identity around Swiss precision engineering and more than a century of grinding expertise. Now independent from Hardinge, the Goldach-based company develops CNC precision grinding machines and serves manufacturers worldwide with application support, automation, training, and service.
UNITED GRINDING GroupWith roots stretching back more than a century, UNITED GRINDING Group is a Swiss precision-machinery company whose brands have produced and delivered more than 150,000 machines worldwide. Around 2,300 employees support manufacturers from more than 20 production, service and sales locations, pairing specialized machine-building knowledge with long-term technical support for demanding production work.MIAMISBURG, OH
Maschinenfabrik HerkulesSince 1911, Maschinenfabrik Herkules has built its identity around roll machining from its headquarters in Siegen, where about 355 employees work across a highly integrated production site. The company is best known for developing precision roll grinders for demanding industries, with its patented foundation-free Monolith™ design reflecting a practical approach to machine stability and installation. Herkules also remains involved long after delivery, supporting customers with service and modernization throughout a machine’s working life.FORD CITY, PA
HerkulesFounded in 1911, Herkules builds heavy-duty roll-grinding machines and lathes for demanding industrial applications. Its Siegen headquarters employs around 355 people and manufactures machines in-house on a 15,459-square-metre production site, with the company’s patented foundation-free Monolith™ machine-bed technology helping control vibration and maintain precision. Herkules also supports machines throughout their life cycle, including modernization and service decades after installation.FORD CITY, PA
Profile Grinding, Inc. (PGI)Founded by Henry Homer in 1945 as a Cleveland centerless grinding shop, Profile Grinding, Inc. is now a fourth-generation, family-owned manufacturer of precision-machined components. PGI works with customers from design through finished part, combining Swiss machining and grinding expertise with in-house testing and assembly to solve demanding production challenges. The company is ISO 9001 certified and reports on-time delivery success of 95% or higher.CLEVELAND, OH