Starrett 486MP-50 Calibrated Blade Slot Micrometer

Starrett 486MP-50 Blade-Type Micrometer covers 25–50 mm with 0.01 mm graduations, designed for fast, accurate measurement of narrow grooves, slots, keyways, and other recesses. As a blade-type micrometer, it uses slender, hardened measuring blades and a non-rotating spindle for precise contact in tight spaces, with a hardened, one-piece spindle that enhances rigidity and repeatability. This model is the 25–50 mm variant of Starrett’s blade micrometer line, ideal for measuring external dimensions of narrow features that conventional micrometers struggle to reach. Common applications include assessing slots and grooves in precision tooling and parts where accurate, repeatable measurements of thin-walled features are required.