GFB Bore Micrometer 50-75 mm

The GFB Micrometer covers 50-75 mm. A micrometer measures off the pitch of a calibrated screw: one turn of the thimble advances the spindle by the pitch, and the graduation follows from it. It is a step finer than a caliper, and the range extends in 25 mm sections. Used to measure diameter, thickness and bore in machine work. The ratchet applies the same pressure every time — tightening past it corrupts the reading — and zero should be checked against a standard first. Seza Global supplies GFB machine shop and metrology products wholesale. Request a quote for stock, pricing and delivery.