6 in. Extra Smooth Dial Caliper C6421
Sale price
$23.50
Regular price $84.89
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The Mitutoyo 505 series dial calliper uses a combination of a vernier scale and a dial whose pointer travels one rotation for each 0.1 measured to perform precise outside diameter (OD), inside diameter (ID), depth, and step measurements. The dial calliper has a fixed (main) scale and a movable dial, unlike the vernier calliper which has a second, movable vernier scale. The dial is circular and has a pointer; it is mounted on a toothed gear track which drives the pointer. As the dial moves over the main scale rule, the pointer rotates once to give the additional fractional reading. The second measurement is added to the main scale reading to obtain a final result accurate to the smallest graduation marked on the dial. The main scale and dial are marked in inches. The dial can be rotated beneath the pointer to measure size differential between two objects. The dial calliper is easier to read than the vernier calliper, thus safeguarding against user reading errors. Its standard of precise measurement complements the use of the vernier calliper; the dial provides an ease in reading and interpolating measurements which most vernier callipers, due to their need for direct observation of both scales, may not provide. The dial uses a rack-and-pinion mechanism and is mounted on a gear track where each tooth equals one quarter of the dial revolution, and four teeth equal 0.1. The smooth-moving dial is graduated to 0.001 and offers gear train shock protection. A thumbwheel permits fast operation with one hand. A clamping screw controls scale movement and a dial calibration lock holds the sliding jaws position. The calliper is made of hardened stainless steel construction with titanium nitride (TiN) coating on the beam wear surface helps extend calliper life. Two sets of jaws provide four-way measurement capability: outside dimension (OD), inside dimension (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. Callipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Callipers are commonly used in architecture, metalworking, mechanical engineering, and machining. The simplest callipers have two legs to mark the two points and require a ruler to take the measurement. More complex callipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital callipers 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 calliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial calliper 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 digital calliper takes a differential by zeroing the display at any point along the slide, with an LCD that displays a single valu
6 in. Extra Smooth Dial Caliper C6421
Sale price
$23.50
Regular price $84.89
Shipping calculated at checkout.