Starrett T436.1XRL-8 Outside Micrometer 7-8 in

Starrett 7-8 Inch Outside Micrometer

This mechanical micrometer measures external dimensions from 7 in to 8 in with a resolution of 0.0001 in and stated accuracy of +/- 0.0001 in. A carbide flat anvil and a .3 in rotating spindle resist wear while a ratchet thimble applies consistent measuring force. The steel frame includes a ring lock nut and an adjustable wrench for zero setting.

Vernier Scale Limits at 0.0001 Inch

The vernier display resolves to 0.0001 in, so readings depend on eye alignment and lighting rather than an electronic readout. Thermal expansion of the steel frame and operator hand heat can shift results beyond the stated tolerance. No long-form calibration certificate is supplied, so critical work may require independent verification before use.

Bench Setup With Included Wrench

The tool ships in a fitted case with an adjustable wrench for spindle zero adjustment. Users must clean anvil and spindle faces, then turn the thimble until the zero line aligns while applying the ratchet. Common errors include debris on the carbide faces, over-tightening the ratchet, and reading the vernier at an angle instead of square-on.