Mitutoyo 395-251 Spherical LCD Face Micrometer, Ratchet Stop, 0-25mm Range, 0.001mm Graduation, +/-0.002mm Accuracy, Flat Spindle

The Mitutoyo 395 series outside micrometer has spherical anvil and spindle faces appropriate for measuring the wall thickness of tubing. It also has a ratchet-stop mechanism, an LCD digital readout that displays in metric units with resolution to 0.001mm, and Statistical Process Control (SPC) data output to transmit results to a computer or external device. The output jack transmits SPC results to a computer through an interface cable (sold separately). The micrometer’s electronic microprocessor can hold measurements at any position, convert to absolute value, set a temporary zero position, and return to a true zero reading. The electronics housing has an Ingress Protection 65 (IP65) rating, for protection against penetration by dust, liquids, and coolant up to the force of a low-pressure (to 30 kilonewtons/meter-squared) water jet. The steel frame has a black, heat-insulated finish, and the thimble and sleeve have a glare-free, satin chrome rust- and glare-resistant finish. The micrometer’s knurled friction thimble and ratchet-stop mechanism to help provide uniform pressure for precise, repeatable measurement during adjustment. A lock nut helps ensure quick spindle locking. The unit comes with an SR44 battery and a fitted plastic case.

Micrometers 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. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.

Mitutoyo manufactures precision measuring tools, metrology equipment, and systems. The company was founded in Tokyo in 1934 and formed Mitutoyo America Corporation in 1963, which is headquartered in Aurora, IL.