Keyset Cutters

A keyset cutter (or keyseat/keyway cutter) is a specialized end mill designed to cut precise, semi-circular grooves called keyways into shafts or bores. These keyways are used to fit keys for secure torque transmission between rotating parts. They are typically center-cutting with a specific width for a single-pass cut. Common types include Woodruff cutters (for semi-circular keys), straight tooth, and staggered tooth cutters, available in carbide or HSS with various coatings. They are essential for manufacturing and repairing machinery with keyed shafts and hubs.