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The Standard in Precision Honing Performance

Sunnen technicians grade and qualify all honing stones, before shipping them, to ensure that industries receive honing stones of the most enduring and exacting quality standard in precision honing performance. Sunnen's line of honing abrasives operates at superior economic efficiency and bore sizing accuracy levels with an unparalleled finishing performance a quality engineers have come to expect from Sunnen Products Company.

Sunnen engineers devoted extensive research into developing the highest quality honing abrasives, honing stones and honing tools specifically for bore sizing and finishing. Our focus is not blurred by involvement with abrasives for other applications, such as grinding. Sunnen has an 8000-square meter facility where engineers develop and manufacture honing abrasives and oils specifically for precision boring and honing.

Machines that Work Harder. Accessories that Last Longer.

Our reputation is built on quality and durability. You’ll find Sunnen machines from the 1940s that are still running strong to this day. Over the years, we’ve applied our expertise with emerging technologies to develop the industry’s largest catalog of bore finishing machines. We also offer all the tools, accessories and training necessary to sustain a high-performance operation.

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