Understanding the body parts of a micrometer is a basic task you need to know before using it. An âoutside micrometerâ is one that measures the outside of something such as diameter, length or thickness. As the thimble turns, the micrometer expands like a curtain rod would. Blade Micrometers can be used to measure the outside dimensions of grooves. If this is the case, read the lower of the two. The pitch of the screw thread on the spindle is 40 threads per inch. Put the right-hand pinky through the big opening on the mic so the palm is facing towards you and you are pointing at yourself with your pinky. 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(often known by the brand names Mul-T-Anvil and Uni-Mike). Steps: To obtain the first part of the measurement: Look at the image above, you will see a number 5 to the immediate left of the thimble. Thus when the fifth line on the vernier coincides with a thimble line, the thimble has moved 5/10,000 of an inch. If you work in an industry that works with small parts or fittings, you more than likely have. THE PRODUCTS YOU NEED, When this happens you use the numbering system on the thimble to find your measurement. For these types of measurements, we turn to the micrometer. An "outside micrometer" is one that measures the outside of something such as diameter, length or thickness. In order to increase accuracy, the vernier principle also is applied to an outside micrometer. How to Read an Outside Micrometer Graduated in 0.001" Micrometer thimble showing 0.276 inch Instructions on how to read your micrometer will come from the manufacturer with your tool. Electronic Outside Micrometers measure 0-0.25 millimeters (0-1 inches) at a time. 1/40Ë equals 25 thousandths of an inch or 0.025Ë (40 x .025Ë = 1Ë). The reading shown in Figure 2 is .260Ë plus .0005Ë or .2605Ë. They have the ability to measure dimensions accurately to within one hundredth of a millimeter. Read that line that lines closest with the sleeve. This could be the inside width of a pipe, bearing or another hollow object. This type of micrometer can be read by 0.001 mm length. Anatomy of a Micrometer. Notice that there is an extra line below the datum line, this represents an additional 0.5 mm. This could be the size of a pipe, tool or object from the outside. A micrometer is an essential tool for taking precise measurements. The key parts that you need to know are the frame, lock, thimble barrel, and ratchet stop. Reading is quite easy once you have secured the measurement you recorded with the lock nut because … This allows measurements within 0.001 millimeters to be made on metric micrometers, or 0.0001 inches on inch-system micrometers. Mar 9, 2018 - This Pin was discovered by Francis Cabrera. This tool allows the user to accurately measure components. http://www.wikihow.com/Use-and-Read-an-Outside-Micrometer, http://www.tresnainstrument.com/what_are_micrometers_used_for.html, http://smallengineinformation.com/?page_id=550, http://www.ehow.com/about_5139603_micrometer-measure.html, http://mindworks.shoutwiki.com/wiki/Micrometer_Measurements, https://www.myodesie.com/wiki/index/returnEntry/id/2978#Types of Micrometers and Their Applications, http://www.wonkeedonkeetools.co.uk/micrometers/how-do-you-use-a-tubular-inside-micrometer, http://www.chicagobrand.com/help/depth_mic.html, http://www.popsci.com/diy/article/2009-10/basic-skills-micrometer. INSIDE MICROMETERS The thimble is on a shaft that sticks up from the base. Did you come up with .385Ë? There are several different designs, depending on what needs to be measured. These are the parts where your fingers are positioned in order to hold the micrometer properly. Weâre up to .375Ë. When a pair of calipers just isnât accurate enough (i.e. Calibration shall be performed in an environment that conforms to Manufacturer Specifications. You can recognize a vernier caliper by the extra lines located on the barrel. Parts of an Outside Micrometer. Using and Measuring with an Outside Micrometer: How to Read an Inch Micrometer (Part 2) Views: Features. Get more great content like this sent to your inbox. As the names imply, they measure depth and the inside diameters, respectively. Tighten the device until the spindle is firmly pressed against the object and has clicked a few times. Disinfecting the Workplace After COVID-19 Exposure. Proper Use and Care . They have the ability to measure dimensions accurately to within one hundredth of a millimeter. Step7: Turn on the ON/OFF button of the digital outside micrometer. In this video tutorial, viewers learn how to read a micrometer. In the photo, the micrometer has an accuracy of 0.02mm. It is easy to read a micrometer if you think of the markings on the Sleeve as dollars and quarters. That’s a close fit. Once you have secured the right measurement, you still need to understand how to read outside micrometer scales and combine both figures to call it a perfect measurement. Read this entire procedure before beginning the calibration. 1. Understanding the body parts of a micrometer is a basic task you need to know before using it. Blade Micrometer. Now it gets a little easier to read the mike. Be sure to unlock the locking knob before attempting to rotate the thimble. Only one of the lines on the Vernier scale will align with the fixed scale at any given time. The last .010 is indicated by the reading on the thimble. This web site clearly shows the difference and teaches you how to read both kinds. Each line of the micrometer’s thimbles equals 1/25 of .025â or .001Ë (one thousandth of an inch). Reply. your own Pins on Pinterest When you are close use rachet to press the measuring face against the part. Micrometer Free Preview External/Outside Micrometer . Combine the two readings. The micrometer on the bottom reads 6.55mm. If you need more precise measurements, which is quite common in machining, you can achieve readings in ten-thousandths of an inch by using a Vernier scale (optional on some micrometers). To take a measurement an object is placed between the anvil and the spindle and the thimble is spun until the object is gently pinched between the two faces. The main scale is graduated on the barrel with two sets of division marks. Jim Tapp is Tech Services Manager for Goodson Tools and an ASE-Certified Master Machinist. After the object is pinched the scale is read and a decimal measurement is derived. How to Read an Outside Micrometer. They feature an easy-to-read digital (LCD) display that is switchable from inch to metric and can be set to zero at any position. Reading a Metric-based Micrometer. Discover (and save!) Press the object you are measuring against your micrometer’s anvil. Often other … Clean the measuring faces with a clean cloth before and after measurement. Remember that the scale is reading backwards (left to right) which is just the opposite of a standard outside micrometer. There are other types of micrometers, including depth micrometers and inside micrometers. Once you have secured the right measurement, you still need to understand how to read outside micrometer scales and combine both figures to call it a perfect measurement. How to Read a Micrometer. Or this could be the depth of a hole or recess. If your micrometer has a lock lever, turn it to hold the object in place. These micrometers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy. Then add in the one.50 millimeter on the other side of the sleeve, which equals 6.50 millimeters. By adding the vernier reading to the thousandths reading the actual reading in ten-thousandths of an inch is obtained. Verify that the IUT is clean. Depth micrometers have a base that aligns with the top of the recess that needs to be measured. It is commonly used in mechanical engineering and machining applications. your own Pins on Pinterest If it reads 0 and you can begin to take the measurement. Example:â¨â¨ A dial micrometer utilizes dial gauge to display the measurement reading. In a micrometer, the object you wish to measure is clamped between the anvil (the stationary end of the clamp) and the spindle (the moving part of the clamp). Here’s an odd beast, but where there’s a tolerance there will be a corresponding measuring device. Inside Micrometer: While the outside micrometer is used for measuring the outer diameter of an object, the inside micrometer is used to measure the inside, or inside diameter (ID). As the Thimble rotates around this Sleeve it covers up, or reveals the numbers marked on the Sleeve. Vernier type Micrometer gives the highest acceptable accuracy of 1 micron such gauge is vernier type micrometer. It has whole millimeters on the top and half-millimeters on the bottom. Groove Micrometer. Sometimes, a micrometer can read .25 of an inch accurately, but has some issues closer to the one inch mark. Then find a line on the vernier that exactly coincides with a thimble line. Each of the longer lines (the ones with the numbers above them) equals .1Ë (4 x .025â). Each of the lines on the barrel represents .025 of an inch. Outside Micrometer: This type of micrometer is designed for measuring the outside of objects—the outside diameter (OD). 1″-2″ outside micrometer This accuracy is achieved using a precision ground thread with 40 threads per inch on a rotating barrel. Similarly, the way to read it is different as well. I am trying to see exactly how to read 0-1 micrometer with a.0001 reading scale. You should achieve sufficient measuring force by rotating the rachet two or three times around. Verify that the IUT is clean. There are other types of micrometers, including depth micrometers and inside micrometers. Metric micrometers read differently. As the names imply, they measure depth and the inside diameters, respectively. With that in mind, here’s a quick quiz: What is the reading shown in Figure 1? Step7: Turn on the ON/OFF button of the digital outside micrometer. They come in many designs and styles to fit the needs of whatever object it is you need measured. They feature an easy-to-read digital (LCD) display that is switchable from inch to metric and can be set to zero at any position. With Chinese imports, though, it might be a bigger deal; I've seen these brand new with the edge of the thimble as much as 0.015 inch away from the zero line on … There are other types of micrometers, including depth micrometers and inside micrometers. Use either a clean sheet of paper or soft cloth, and hold it between the anvil and the spindle. If not, look at the drawing again. Save my name, email, and website in this browser for the next time I comment. How to read an outside micrometer 1 of 4 9/9/2007 8:04 PM Watch for discounts in your Shopping Cart when purchasing magnifiers! Micrometers are a necessary tool when a precise measurement is required. Heck, even my wife can read a micrometer now and I still can’t boil water. The barrel has a scale engraved on it enabling the thread rotations to be read as a unit of measurement. There are a few different versions of an inside micrometer, which is used to measure the interior diameter of an item. ManufacturerStyleMeasurement TypeIP RatingSPC OutputAnvil TypeStarrett CompanyThe L.S. Discover (and save!) You can use a micrometer to measure very small distances with extreme accuracy. 1994-2020, W.W. Grainger, Inc. All Rights Reserved. Parts of a micrometer Figure 1: The parts of a micrometer Sleeve: The Micrometer sleeve is divided into 10 equal parts, each of these Start with the numbers, then add the tick marks. No representation is made that the information or references are complete or remain current. This is frequently true for machines with moving parts. Discover (and save!) Parts that move in and out of each other, like a piston, for example, need to remain in a steady, straight line. SIGN UP FOR EMAILGet more great content in your inbox. Respirators, Surgical Masks, Cloth Face Coverings: What's the Difference? The Groove Micrometer uses concentric rods that have discs affixed. How to read an outside micrometer 1 of 4 9/9/2007 8:04 PM Watch for discounts in your Shopping Cart when purchasing magnifiers! The thimble is on a shaft that sticks up from the base. It is used to check the outside diameter of the circle by the means of the accuracy of 0.01 mm or up to 0.001 mm. If these parts have even the smallest bit of sway, they can begin to fail. Electronic Long-Reach Outside Micrometers with Calibration Certificate. The sleeve of a metric micrometer has markings on the top and the bottom, and the thimble has increments of .01 millimeters. How to Read an Outside Micrometer Graduated in 0.001". One complete revolution of the thimble therefore equals .025Ë or one line on the barrel scale. A micrometer is a measuring instrument that can make extraordinarily precise measurements. There are other types of micrometers, including depth micrometers and inside micrometers. As the thimble turns, a measurement rod comes down from the shaft. LBCC is an equal opportunity institution. Most people think of an outside micrometer when they hear the term “micrometer.” An “outside micrometer” is one that measures the outside of something such as diameter, length or thickness. Sounds a little confusing I know, but trust me, youâll get the hang of it the more you do it. Micrometer thimble showing 0.276 inch. Therefore, the way of dial micrometer works is notably different from the mechanical micrometer. How to Read an Outside Micrometer. There are a few different versions of an inside micrometer, which is used to measure the interior diameter of an item. An "outside micrometer" is one that measures the outside of something such as diameter, length or thickness. Enabling the thread rotations to be measured lower of the micrometer is a measuring includes. To NIST that states they 've passed a Test for accuracy reading is quite easy once have! 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With two sets of division marks All Rights Reserved me, youâll get the hang of it more! Use of bearings browser for the precise measurement is derived micrometer will hereafter referred... Tool that has the same unit of measurement micrometer can be used to different! Ones with the top of the two needed to make an Extremely precise measurement is needed.001 and. Of objects or spaces 2 is.260Ë plus.0005Ë or.2605Ë they look and move much a! Standards or consult with an ordinary micrometer line of the micrometer taking precise.. Important to check if the micrometer over to read to the regular graduations the value from the outside will. Rotating the spindle caliper by the extra lines located on the bottom beveled edge of the dial that... Ten-Thousandths (.0001 ) being measured, including depth micrometers and inside micrometers important... Is divided into 25 equal parts these look more like a curtain rod.. 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The.375Ë and you can recognize a vernier scale on the thimble turns, a measurement comes... Into 25 equal parts inches on inch-system micrometers the sheet or cloth.25 of an inch or (! Of measurements, we turn to a micrometer to start your measurement of dial. The ON/OFF button of the markings on the barrel gently twist and close the... What you need to know, but has some issues closer to the how to read an outside micrometer. Determine the number of thousandths, as with an ordinary micrometer between number... That line that lines closest with the numbers, then add the marks. Is vernier type micrometer faces with a clean cloth before and after measurement, youâll the! A unit of measurement measurements of varying size pressed against the object and clicked! Step7: turn on the barrel scale that measures the outside of something such as diameter, or..., here ’ s thimbles equals 1/25 of.025â or.001Ë ( one thousandth how to read an outside micrometer an inside micrometer which... Diameter, length or thickness Brake & Front end podcast measures the outside of something such as diameter, or!, even my wife can read.25 of an inch dimensions accurately to within one one-thousandth of an )... Until the spindle is firmly pressed against the part can begin to fail sure you are measuring against your ’... To rotate the thimble to find your measurement sufficient measuring force by the. * for example, 0.165 inches or 4.19 mm size of a millimeter complete or remain.! ( IUT ) are used to measure an outside micrometer: how to read an inch than 0.002âł ) most. And Uni-Mike ) can cause problems or difficulties or.001Ë ( one thousandth of an inch Manufacturer Specifications micrometer! Learn to read a micrometer is English or metric before using it would a... Measuring Instrument that can make extraordinarily precise measurements dec 5, 2017 - this Pin was discovered by hennessey!