by Mitutoyo
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The Mitutoyo 505-675-52 dial caliper uses a dial to perform precise measurements to within 0.001" mm, necessary for applications requiring the highest accuracy, such as in scientific research and in industries where parts must fit exactly. It has a dial with a purple face and measures in inches. One revolution of the dial indicator needle equals one-tenth inch on the main scale.
The dial uses a rack-and-pinion mechanism and is mounted on a gear track where each tooth equals 0.025" or one quarter of the dial resolution, and four teeth equal 0.100." The main scale is graduated in 0.100" increments, and the dial is graduated from 0.001" up to one-hundred-thousandths of an inch. The dial has smooth movement and gear train shock protection. A thumbwheel permits fast and easy measuring. A clamping screw controls scale movement and a dial calibration lock holds the sliding jaw’s position. The caliper weighs 175 g and is made of hardened stainless steel construction with titanium nitride (TiN) coating on the beam wear surface to help extend caliper life. With its fixed and movable jaws, it has four-way measurement capability: outer diameter (OD), inner diameter (ID), depth, and step, where the butt end of the fixed jaw measures one end of a work piece before its upper/lower or inner/outer "steps" are measured. It has a main slide length of 231 mm, a lower jaw depth of 40 mm, an upper jaw length of 21 mm, an upper jaw depth of 16.5 mm, and a beam width of 16.0 mm. Jaws are lapped to increase accuracy. Range is 0” to 6", range per revolution is 0.100", resolution is 0.001", and accuracy is rated at + or - 0.001", which meets Federal Accuracy Specifications GGG-C-111B.
Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Calipers are commonly used in architecture, metalworking, mechanical engineering, machining, manufacturing, carpentry, and medicine. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers all give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial caliper has a circular dial with a pointer on a toothed gear rack replacing the second vernier scale. As with the vernier, this second measurement is added to the reading from the main scale to obtain the result. The dial caliper is used for measuring size differential between two objects, as well. The digital caliper takes the same sort of differential measurements as the dial caliper by zeroing the display at any point along the slide, with an LCD (replacing the dial) that displays a single, easily read value in both English and metric units. Some digital calipers can hold data readings between measurements and send them to data collection devices.
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.
What’s in the Box?
- Mitutoyo 505-675-52 dial caliper
- Fitted, plastic case
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