Crucial Things About Depth Micrometer Reading & Selecting

Crucial Things About Depth Micrometer Reading & Selecting 1

One of the essential parts of working in the fields of manufacturing, engineering, as well as landscaping, is a precise measurement. You can measure objects and spaces in the flat and visible surfaces by the depth of water and the center of a tread on the car tire. On the other hand, if you’re going to measure depth, such as depth of impression and depth of water on the auto tire, it needs special tools. Read on to know more about depth measuring reading tools.

Crucial Things About Depth Micrometer Reading & Selecting 2

There are fundamental tools that you can utilize for measuring essential depths of things, such as swimming pools and shallow water. These pieces of types of equipment graduated metal rods as well as meter sticks. However, if you are looking for a measuring tool to make precise depth measurement of slots, holes, as well as crevices at an extreme scale is the depth micrometer. This is a perfect tool that can also be utilized to measure things such as metal recesses, drill holes, and the depth of tire treads that should be a particular depth. The state of the art depth micrometer is made with measuring rods submerged into the holes or slots to be measured. This fantastic tool can be fitted with the rods of diverse lengths for measuring recesses of different depths.

More About Depth Micrometers

This groundbreaking tool is utilized in measuring the intensity of slots, recesses, counterbores, holes as well as space from a surface to recessed areas. This measuring tool is read accurately, contradictory to the technique utilized to read outside micrometers. You can find the zero towards the closed end of the thimble. Measurement reading happens in reverses and augments in the amount of depth as the thimble moves on the foot or bottom of the device or tool.

Depth Micrometer Parts

Micrometer depth micrometer takes account of even or flat bottom connected to the sleeve or barrel on the head of the micrometer. The range is zero to six inches, and it all depends on the extension rod’s length that was applied. The thread on which the thimble rotates goes around, or all known as a hollow micrometer screw, has a one-inch range. The flat bottom is around 4”, and six extension rods with this depth gage.  Measurement rods snap into the rod that received the shaft. The best thing about it is that it doesn’t have screws, so there are mess and confusion in using it.

Depth Micrometer is easy to calibrate; all you have to do is to put in the 0 to 1 rod and then turn the thimble counterclockwise. You have to do this so that the tip of the measuring rod is recessed into the bottom or base. Securely and tightly grasp the bottom flush on an even surface while rotating clockwise the thimble ratchet until the tip of the measuring rod is stop in the even surface. You also need to ensure that you hear the thimble ratchet clicks three times. After this, you have to tighten the lock. You also need to ensure that the sleeve zero is aligned with the zero on the scale. In case they are not lined up, but the tip of the wrench calibration in the hole of the calibration wrench on the sleeve, and then turn it around to obtain the perfect and precise alignment.

How to Make Actual Measurement

It is so easy to make an actual measurement. First and foremost, you need to pick the measurement rod that is ideal for the distance and depth that needs to be measured. Next, you need to ensure that the measurement rod surface, as well as rod-receiving shaft, is dirt free. Put in and then turn the measurement rod around into the rod-receiving shaft to totally seat it. Rotate the thimble counterclockwise. This is important as if the bottom is flush on the top surface, and the measurement rod will not touch the surface that needs to be measured. While grasping the base securely on the reference surface, turn the thimble around, but this time clockwise and stop once the rod ends on the measurement surface. You have to read the measurement of the depth. There is no need to go into detail on how to precisely read the scales, which guide can be obtained in the outside micrometer part.

Micrometer Reading: What You Have to Know

When it comes to depth micrometer reading, you will see that the graduation located on the casing are numbered in the contradicting way of those on an inside or outside micrometer. Keep in mind that when reading a depth micrometer, the space that needs to be measured is the value that is enclosed and roofed in the thimble.

The edge of the thimble is between four and five. This displays a 0.400-inch value on the major divisions of the sleeve. What is more, the thimble also roofs on the sleeve initial minor division. This has a 0.025-inch value. The rate display on the circumference scale of the thimble is 0.010 inch. Summing up, the three values mentioned above will result in 0.435 inches or the whole distance, which the end of the extension rod has traveled from the bottom.  Once the measurement is added to the extension, the rod length used provides you the entire depth of the recess, hole, or groove.

How to Choose Depth Micrometer?

If this is your first time to purchase a depth micrometer, you need to search for something to help you in finding the best one. There are many types of micrometers in which choosing the right one is confusing. Picking the best and the appropriate one is vital. Here are the things you need to consider when buying a micrometer.

Know the Types

Micrometers are available in various sizes and shapes. Each type has a different use. So, it is vital to buy the best type, which is ideal for the task. Typically, this tool is divided into three categories, such as:

Outside Micrometer: This type of micrometer is usually utilized to measure blocks, pipes, and wires. This micrometer can measure anything slimmer compared to a piece of paper to an item which is many feet wide.

Depth Micrometer: If you want to measure slots, teeth as well as steps depth, then you need to consider this one.

Inside: This is utilized in measuring the tube and hole’s interior.

Pick the Digital Type

A depth micrometer is available in analog and digital types. Expert highly recommends using the digital one because it allows the user to easily and precisely read the measurement. Also, with digital type, there is no need for measuring and calculating the first and second scales like the dial as well as Vernier micrometer. All you need to do is to know what digits are shown on the display or LCD screen.

Some buttons are a good indication of better functionality. The vital functions are to change the unit system from mm to inch or from inch to mm and to zeroing as well. With this kind of depth micrometer, there is no need for investing a lot of time in learning the tool which you need to do this in an analog type. Also, you can instantly utilize a micrometer. If you are utilizing the Vernier and the dial type, then converting, reading, and zeroing takes a lot of time, most notably if you are a beginner. You will find it so hard and complicated too.

It would help if you opted for the digital type when you fulfill these conditions:

  • Beginner
  • Measuring purpose

On the other hand, choose the mechanical type that is cheaper if you fulfill conditions such as newbie or get to know more this tool.

Ensure the Graduation is in Inch

Living in the US wherein you used to read with imperial graduation or inch system, changing the metric might slow the reading ability. So, you need to choose the unit system which you are used to.

Know the Tolerance

How vital is preciseness and correctness to you? Do you want to gauge the material to the nearest hundredth or thousandth? Then you should stick with a specific brand when correctness and accuracy are very important to you.


Of course, the brand plays a vital role in choosing the right micrometer. If you want it to last longer, then choose a renowned brand with years of existence in the business. It is also very essential to read reviews online as this will help you find the right product.


If you are a beginner in-depth micrometer and don’t know what to look for, this article will help you a lot. Buying a depth micrometer is not an easy task. Make sure to purchase the digital one, choose inch graduation, and make sure to choose the best brand to make the most out of your money.

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