For nearly 100 years, Sunnen has built a global business around delivering the highest levels of precision to our customers.
Manufacturers around the world rely on Sunnen to engineer incredible performance for their most critical parts. We’re ready to get to work for you. Fill out the form below and one of our representatives will get in touch. Together, we’ll achieve extraordinary results.
The Sunnen story began with an idea. Joe Sunnen, a hopeful inventor, created the adjustable valve lifter tool while working at his brother’s auto garage. Though only 22 years old, Sunnen quickly made a decision that changed his life.
Sunnen’s standard warranty covers every machine for three years or 6,000 spindle hours, whichever comes first. It applies to all Sunnen base machines and factory-installed options. We also cover all custom fixtures, automations, tooling, gages and other accessories with a revised one-year warranty.
Sunnen tooling includes standard mandrels, retractable stone mandrels, plated-diamond Single Stroke® and KROSSGRINDING® tools, the MPS Modular Tool System, General Hone® brand heavy-duty hone heads, MMT™ Mandrels, KRQ Quick Change mandrels, and a wide variety of two-stage and multi-stone tools.
Sunnen honing abrasives increase performance, whether you use a Sunnen system or other honing equipment.
Sunnen is a global name in automotive engine Honing. Over nearly a century, we’ve perfected the art of honing automotive engine parts. From engine blocks to connecting rods, we understand the impact of a single part on the performance and reliability of the engine. Our engine building products are built and refined by decades of experience driving precision to the automotive industry.