micrometer

Machinist's measuring tool

A micrometer is a unit of length equal to one millionth of a meter, also called a micron.

It measures things too small for the naked eye: bacteria, cells, wavelengths of light.

Separately, a micrometer is a precision measuring instrument with a calibrated screw, used to measure small distances or thicknesses with great accuracy: The machinist checked the shaft diameter with a micrometer.

instrument

caliper

Tool measuring thickness or diameter

thimble · sleeve · ratchet · vernier

precision

accuracy

Degree of correctness

resolution · repeatability · graduations · thousandths · ten-thousandths · interpolation · parallax · backlash

applications

machining

Subtractive metalworking process

toolmaking · aerospace · automotive · engineering · milling · grinding · crankshaft · watchmaking · gunsmithing

calibration

standard

Level of quality accepted

traceability · drift

unit

submillimeter

Less than one millimeter

Categories
Opposites
measurement scale/precision level

micrometermeasuring wheel

Rolling distance counter

tape measure · yardstick · ruler · odometer · pedometer

unit of length magnitude

micrometermegameter

Unit equaling million meters

light-year · parsec · kilometer · astronomical unit · mile

Family

micrometers, micrometre

Familiarity
Top 200,000
Profile
Used worldwide · Timeless · Concrete · Rated G