Sunnen is the leader in precision bore sizing systems worldwide. With 100 years of experience, Sunnen provides precision bore honing solutions for an incredibly wide range of industries and applications.

Our SunExpert app provides users with helpful support for various calculations related to honing.

The SunExpert app supports the calculations of the relevant application parameters, stock removal rate and surface finish. Moreover, it acts as an economic calculator for large series as well as for a single job. It offers a simple unit converter for the most commonly used units.
The user will also find helpful tips for solving bore sizing and finishing problems.