Key, 4x28 mm

Working on a machine that had a stripped adjustment slot, this replacement 4x28 mm key slid right in with no wobble. The harder steel feels more durable than the original part it replaced.

My old key finally sheared off after years of use, and this 4x28 mm replacement dropped right in with no filing needed. Fits my bench top machine's pulley slot perfectly and the tolerances feel tight.

Wasn't sure a 4x28 mm key would match the pulley slot on my old lathe, but it slid in with barely any play. Machined cleanly with no burrs on the edges, which I've run into before with cheap keys. Back in business.