About Dial Calipers
Calipers have been in use for thousands of years, and are used by a wide array of professionals such as jewelers, engineers and health professionals. There are various types of calipers, and they are used to measure objects. Dial calipers are modeled after vernier calipers. Dial calipers are preferred because of the ability to read them better and for their durability.
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Features
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Dial calipers have a dial, scale, two jaws (or what looks like pincers) that are immovable, two jaws that move, a lock and a depth rod. The tips of the jaws are placed on an object that will be measured. When the calipers are removed, you can read the measurement of the object within the dial.
Functions
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The jaws of the calipers are used to measure any inside (depth) or outside (such as diameter) of an object. The dial can read in inches or millimeters. For example, if you had a jar, not only could you read the outside rim (the opening) of the jar, but the extension of the jaws can allow for measurement within (inside) the jar.
Types
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There are two types of dial calipers. One version is the 0.02 mm calipers, while the other is the 0.01 mm calipers. With the 0.01 calipers, one revolution inside the dial represents a measurement of 1mm. With the 0.02 calipers, a revolution equals 2 mm.
Care
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Dial calipers must be wiped (with a soft cloth) and cleaned to remove any oil, dirt, or dust, otherwise they won't read properly. Never try to take the calipers apart, because this can damage ithem. Never use any solvents other than WD-40 to clean your calipers. You can spray a little onto a cloth to rub onto the calipers, and then gently rub it off with another clean, soft cloth.
Repair
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Occasionally, due to wear, the end of the jaws will need to be repaired. The ends will have to be reground so that they remain parallel. Some dial calipers come with coated jaws, which minimizes the damage that can occur. Never try to drop your calipers, because this can cause inaccuracy in readings. The repair of a broken dial may not be possible.
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- Photo Credit http://commons.wikimedia.org/wiki/File:Dial_calipers.jpg
