Sunnen Y12385BH Hard Steel Keyway Mandrel 2 Inch Shank

Sunnen Y12385BH is a hard steel keyway mandrel with a 2-inch shank, part of Sunnen's Y Series. Built from hardened steel for durability in precision honing, it provides a rigid interface that helps maintain concentricity and stable support when honing components with internal keyways. As a member of the Y Series, this mandrel is designed to integrate with Sunnen honing machines and tooling, delivering repeatable results across keyway and slot honing tasks while working within Sunnen's broader abrasives and accessory ecosystem. The designation Y12385BH identifies a high-strength mandrel intended for hard, precision applications where reliable wear resistance and dimensional stability are essential during high-precision bore finishing. Used in conjunction with compatible Sunnen tooling, it enables accurate alignment in tight tolerances and contributes to improved surface finishes on small-diameter parts. The Y Series family is built to harmonize with Sunnen's standard honing workflow, providing a coherent solution for shops performing precision honing, straightening, and finishing of parts with integral or machine-key features.