Sunnen L3-NM45 CBN Stone For Honing Applications

Sunnen L3-NM45 CBN Stone is a Cubic Boron Nitride honing stone in Sunnen’s L3 series, designed for precision bore finishing on Sunnen honing equipment. It uses a metal-bond construction and carries NM45 designation with a 150-grit finish, offering robust abrasive life and a fine surface finish suited for high-precision bore sizing. Typical use cases include honing hardened steels, carbide, and related substrates on Sunnen L3-series tooling, with performance aligned to other NM45 CBN stones in Sunnen's external-hones catalog. As part of Sunnen's range of superabrasives, the L3 NM45 is one of the metal-bond CBN options designed to deliver repeatable, surface-finish results in precision bore finishing.