For over 100 years, Sunnen has built a global business around delivering the highest levels of precision to our customers. Combining a robust distribution network with industry-leading technology, Sunnen …

For nearly 100 years, Sunnen has built a global business around delivering the highest levels of precision to our customers.

For over 100 years, Sunnen has built a global business around delivering the highest levels of precision to our customers. Combining a robust distribution network with industry-leading technology, Sunnen …

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 …

Today, Sunnen is the exclusive provider of automated bore lapping solutions. Sunnen’s patented machine uses a tool known as a lap, which resembles a honing mandrel but with grooves instead of …

Sunnen honing abrasives increase performance, whether you use a Sunnen system or other honing equipment.

The best way to check the accuracy of honed parts is with Sunnen gages.

Sunnen offers an extensive line of honing machines and accessories for the automotive engine building market. High-performance engine shops and production engine rebuilders around the world rely on …

Sunnen's products are built to last, can be found in thousands of tool rooms worldwide, and come with the best technical and customer support in the industry. Browse our selection of products below.

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 …