Our Vision is Precision

For nearly 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 integrates bore creation, sizing and finishing into one turnkey solution. Together, we’ll achieve extraordinary results.

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Sunnen Spotlight

Automatic Machine Boosts Cylinder Production

Sunnen and Prince Manufacturing teamed up in the development of a new automatic skiving and roller burnishing machine for producing cylinders at Prince’s Lewis & Clark plant.

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Above and Beyond Honing

We’re not just honing parts anymore—we’re honing processes. Our global service team works one-on-one with our customers to refine their operations, engineer custom solutions and deliver the hands-on training they need to be their best.

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Latest Insights

SHDD Series Deep Hole Drilling System

Sunnen SHDD Series Deep Hole Drilling System


Sunnen - ANS Triboconditioning Process


What's the Difference between Honing and Roller-Burnishing?