Mitutoyo 324-353-10 LCD Gear Tooth Micrometer, Ratchet Stop, 2-3"/50-75mm Range, 0.00005"/0.001mm Graduation, +/-0.0002" Accuracy

The Mitutoyo 324 series LCD gear tooth micrometer has an LCD digital readout that displays in inch and metric units with resolution to 0.00005” (0.001mm) for outside diameter (OD) measurement, and is for use with interchangeable ball-tipped anvil and spindle faces for measuring over-pin diameter of gears (sold separately). It has a ratchet-stop mechanism for uniform pressure during adjustment, 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 micrometer has an Ingress Protection 65 (IP65) rating, which means that components are resistant to penetration by dust and debris, and resistant to penetration by liquids and coolant up to the force of a low-pressure (to 30 kilonewtons/meter-squared) water jet. The frame is made of high-grade tool steel. Separate spindle and anvil locks help provide secure locking of the measurement position. 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.