Starrett 569MBXP Tube Micrometre, Plain Thimble, Carbide Faces, 0-25mm Range, 0.01mm Graduation, 9.5mm Min. Hole Size

The Starrett 569 series tube micrometre has a vertical cylindrical anvil for measuring tubing wall thickness, and a Vernier scale in metric units for taking precise outside diameter (OD) measurements. The Vernier scale on the thimble and sleeve is graduated to 0.01mm and has a satin chrome rust- and glare-resistant finish. The micrometre is made of high-grade tool steel with a black enamel finish for protection and durability. The spindle has a micro-lapped measuring face for accuracy and is carbide-tipped for wear resistance. Micrometres are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometres are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometre: outside, inside, and depth. Outside micrometres may also be called micrometre callipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometres are typically used to measure interior diameter, as in a hole. Depth micrometres measure the height, or depth, of any shape that has a step, groove, or slot. The L.S. Starrett Company manufactures precision measuring tools, metrology and testing equipment, and saw blade products. The company was founded in 1880 and is headquartered in Athol, MA.