CALIPERS. DEPTH. GAUGES. HEIGHT. GAUGES. USE. ○ For outside diameter, inside diameter step and depth measurement. MATERIAL. ○ Stainless steel. Main scale. Reference surface. Vernier scale. Depth groove. Thumbwheel. Calipers. Inside jaws. Vernier Caliper. □ Nomenclature. Absolute Digimatic Caliper. Vernier Caliper. A measuring tool for taking inside and outside measurements. Measuring Range. Direct Measuring Devices. Dr. Abdel-Wahab El-Morsy.
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(a) A caliper gage with a vernier. (b) A Vernier, reading +. = mm, (or +. + = in.) (c) We arrive at the last measurement. Use of Vernier Callipers to. (i) measure diameter of a small spherical/cylindrical body,. (ii) measure the dimensions of a given regular body of known mass. Inch Fractional and Decimal Readings. This vernier caliper has two scales which enable read- ings to a fraction of an inch as in the case of 1/" graduated.
Read the scales on your Vernier caliper.
Each scale of your caliper reads like an ordinary ruler. Typically, a caliper has a main scale marked with numbered inches or centimeters, plus smaller divisions between them. The sliding Vernier scale should have a label engraved on it to tell you what it represents. For example, if the main scale's smallest lines represent 0. The main scale is "life size," while the sliding scale is magnified for easy reading.
This magnification system allows the Vernier caliper to measure more precisely than a ruler. Check the scale of your smallest divisions. Before making a measurement, count the number of lines between two numbers on your Vernier scale.
Use this to determine how much distance each of the smallest lines represents.
Clean the object you are measuring. Unlock the screw. If your Vernier caliper has a locking screw, loosen it before you begin.
Twisting something to the right clockwise will tighten it, while twisting it to the left counter clockwise will loosen it. Close the jaws. Before measuring anything, close the jaws and faces to zero out the reading so that you get a precise measurement.
Subtract 1 mm from all measurements to get the right result. If the zero on the sliding scale is to the left of the main scale zero, you have a negative zero error. Slide it so the zeros line up, while watching another mark to see the size of the error. For example, if the 0. Add 1.
Slide one of the jaws against the object. The caliper has two types of jaws. The larger ones tighten around an object, to measure the distance across it. The smaller jaws fit into an opening, and can then be pushed outward to measure its internal diameter.
You can adjust either pair of jaws by sliding the smaller scale. Once you've got one of the jaws in position, tighten the locking screw if there is one. Read the main scale where it lines up with the sliding scale's zero.
The main scale on a Vernier caliper typically tells you the whole number plus the first decimal. Read this just as you would a ruler, measuring to the zero mark on the sliding Vernier scale. For example, if the 0 on the sliding scale lines up with the 2 inch mark, your measurement is 2 inches. If it lines up past 2 inches by six tenth-inch marks, your measurement is 2.
If the result is between two lines, just use the smaller value. Do not try to estimate a value between the two lines. Read the Vernier scale. Find the first mark on the Vernier scale that lines up perfectly with any line on the main scale.
That mark tells you the value of the additional digits. Let's say the scale represents 0. It makes no difference which line on the main scale it aligns with.
We've already taken our reading from the main scale; don't take another one. Add the numbers together. Add the main scale and Vernier scale results together to get the final answer. Make sure you use the correct units as labeled on each scale, or you won't get the right answer.
In our example, we measured 2. Our final measurement is 2. The digits don't always line up this neatly. For example, if the main centimeter scale reads 0. Least count is the ratio of the smallest division of the main scale to the number of divisions on the vernier scale.
Yes No. Not Helpful 46 Helpful For measuring length, compare the 0 line of the Vernier scale with the main scale. Then check the division that coincides with the main scale. Then add the first reading with the third reading by multiplying. Not Helpful 60 Helpful They can be used in the repair or creation of anything that needs a tight tolerance.
These instruments are commonly used in scientific and industrial fields. Not Helpful 33 Helpful What are the different measurements that can be made with a Vernier caliper? The Vernier caliper can measure the inner diameter of an object, the outer diameter of an object, and the depth of an object. Not Helpful 29 Helpful You always get an error when measuring something, it's just probably so small that you don't notice it. If you don't notice it, then the error is probably too small to matter in what you're doing.
Not Helpful 40 Helpful It should be written on the caliper. For example, 0. A lot of other factors, such as measuring force how hard the jaws are pressed together onto the part , temperature and the quality of the caliper all play a part in the accuracy of the measurement. Not Helpful 32 Helpful Not Helpful 42 Helpful You will need calipers or any measuring instrument with a vernier scale and an accuracy of 0.
First, move the slide to 7.
Lock the slide with the screw if necessary. Not Helpful 41 Helpful How can I measure the diameter of a thin cylinder using vernier calipers?
It's used to measure the internal and external diameters of objects and the depth of the objects. Not Helpful 9 Helpful Unanswered Questions. How do I calculate the observed reading of a vernier caliper? Answer this question Flag as Flag as How do I measure freeze plug inner diameter? How do I find the verniers divisions? And how do I find the coinciding of the scale?
How do I find the mean using vernier caliper? How do I measure a thin wire of less than a mm. Include your email address to get a message when this question is answered. Already answered Not a question Bad question Other. By using this service, some information may be shared with YouTube.
Edit Related wikiHows. The circuitry built into the slider counts the bars as the slider moves and does a linear interpolation based on the magnitudes of the capacitors to find the precise position of the slider. Other digital calipers contain an inductive linear encoder, which allows robust performance in the presence of contamination such as coolants. Main article: Micrometer A caliper using a calibrated screw for measurement, rather than a slide, is called an external micrometer caliper gauge, a micrometer caliper or, more often, simply a micrometer.
Sometimes the term caliper, referring to any other type in this article, is held in contradistinction to micrometer. Comparison[ edit ] Each of the above types of calipers has its relative merits and faults. Vernier calipers are rugged and have long lasting accuracy, are coolant proof, are not affected by magnetic fields, and are largely shock proof. They may have both centimeter and inch scales.
However, vernier calipers require good eyesight or a magnifying glass to read and can be difficult to read from a distance or from awkward angles. It is relatively easy to misread the last digit.
In production environments, reading vernier calipers all day long is error-prone and is annoying to the workers. Dial calipers are comparatively easy to read, especially when seeking exact center by rocking and observing the needle movement. They can be set to 0 at any point for comparisons.
They are usually fairly susceptible to shock damage. They are also very prone to getting dirt in the gears, which can cause accuracy problems. Digital calipers switch easily between centimeter and inch systems. They can be set to 0 easily at any point with full count in either direction, and can take measurements even if the display is completely hidden, either by using a "hold" key, or by zeroing the display and closing the jaws, showing the correct measurement, but negative.
They can be mechanically and electronically fragile. Most also require batteries, and do not resist coolant well. They are also only moderately shockproof, and can be vulnerable to dirt. Calipers may read to a resolution of 0.
For example, when measuring the thickness of a plate a vernier caliper must be held at right angles to the piece. Some practice may be needed to measure round or irregular objects correctly. Accuracy of measurement when using a caliper is highly dependent on the skill of the operator. Regardless of type, a caliper's jaws must be forced into contact with the part being measured. As both part and caliper are always to some extent elastic , the amount of force used affects the indication.