Best Inside Micrometres of 2025

Kenneth Collin Avatar
Kenneth Collin
Last Updated: 29 Jan 2025

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Inside micrometres are precision measuring instruments that are used to measure the internal dimensions of objects with high accuracy. They are commonly used in engineering, manufacturing, and quality control to ensure that products meet precise specifications. Inside micrometres come in a range of sizes and styles to accommodate different applications and can measure dimensions such as bore diameter, groove width, and distance between two internal surfaces. Their accuracy and ease of use make them an essential tool for professionals who require precise measurements for their work.

At a Glance: Our Top Picks

Mitutoyo 177-297 4" Inside Micrometre Setting Ring Cover #TOP 1
Mitutoyo 177-297 4" Inside Micrometre Setting Ring
ftb score rating icon 9.9
Mitutoyo 177-287 Setting Ring for Inside Micrometre Cover #TOP 2
Mitutoyo 177-287 Setting Ring for Inside Micrometre
ftb score rating icon 9.8
Mitutoyo 137-204 Inside Micrometre 50 mm-1000 mm Cover #TOP 3
Mitutoyo 137-204 Inside Micrometre 50 mm-1000 mm
ftb score rating icon 9.6

Top 10 Inside Micrometres

#TOP 1

Mitutoyo 177-297 4" Inside Micrometre Setting Ring

177-297
Mitutoyo 177-297 4" Inside Micrometre Setting Ring Cover
Mitutoyo 177-297 Setting Ring for Inside Micrometre, Holtest and Dial Bore Gage, Inch, 4" Size

The Mitutoyo 177-297 Setting Ring is designed for use with inside micrometres, holtests, and dial bore gauges. It measures in inches and has a size of 4 inches, making it a versatile tool for precise internal measurements. This setting ring allows you to achieve accurate calibrations, ensuring that your measurements are reliable. With its compatibility and precise sizing, you can enhance your measuring tasks, bringing convenience and efficiency to your work.

What We Like
High precision measurements
Compatible with various tools
Convenient 4" size
Inch measurement standard
#TOP 2

Mitutoyo 177-287 Setting Ring for Inside Micrometre

177-287
Mitutoyo 177-287 Setting Ring for Inside Micrometre Cover
Mitutoyo 177-287 Setting Ring for Inside Micrometre, Holtest and Dial Bore Gage, Inch, 0.80" Size

The Mitutoyo Setting Ring is designed for use with inside micrometres, holtest, and dial bore gauges, making it a versatile tool for precise measurements. With a size of 0.80 inches, it allows you to achieve accurate internal measurements with ease. This product's inch measurement is particularly beneficial for users who prefer imperial units, ensuring compatibility with a variety of existing tools. By using this setting ring, you can enhance the accuracy of your measurements, ultimately leading to better results in your projects.

What We Like
Compatible with various measuring tools
Accurate internal measurements
Convenient inch measurement
Versatile for different applications
#TOP 3

Mitutoyo 137-204 Inside Micrometre 50 mm-1000 mm

137-204
Mehrfarbig
Mitutoyo 137-204 Inside Micrometre 50 mm-1000 mm Cover
Mitutoyo 137-204 Tubular Inside Micrometre, Range 50 mm-1000 mm

The Mitutoyo Inside Micrometre is designed for precision measurement within the range of 50 mm to 1000 mm. It comes supplied in a fitted plastic case, ensuring that your tool is safely stored and easily transportable. This feature provides convenience when you need to take measurements on the go. Additionally, the series includes various case options, such as wooden cases for larger models, which offer a more durable and professional presentation. This adaptability caters to different user preferences and environments.

What We Like
High precision measurements
Portable fitted plastic case
Durable wooden case option
Wide measurement range
#TOP 4

Mitutoyo 368-916 Internal Micrometre 0.275"-0.5"

368-916
Mitutoyo 368-916 Internal Micrometre 0.275"-0.5" Cover
Mitutoyo 368-916 Hottest Three Point/Two-Point Internal Micrometre, 0.275"-0.5"

The Mitutoyo Internal Micrometre is designed for precision measuring in tight spaces. Its TiN-coated measuring contact points provide exceptional durability, ensuring they withstand wear and tear while allowing you to measure right to the bottom of a blind hole. The carbide-tipped contact points enhance longevity and accuracy, making it ideal for deep hole measurements. Additionally, the optional extension rod enables you to reach deeper areas effortlessly. With the ratchet stop feature, you can apply constant force, ensuring reliability in your measurements.

What We Like
Durable TiN-coated contact points
Carbide-tipped for longevity
Measures deep holes easily
Optional extension rod available
Constant force with ratchet stop
#TOP 5

Accusize 2-3'' Inside Micrometer, Satin Chrome Finish

EG00-3223
2-3"
Accusize 2-3'' Inside Micrometer, Satin Chrome Finish Cover
Accusize - 2-3'' x 0.001'' Inside Micrometer, Satin Chrome Finished, #EG00-3223

The Accusize Inside Micrometer offers a range of 2-3 inches, making it ideal for precise measurements in various applications. With a graduation of 0.001 inches and an accuracy of 0.00028 inches, you can trust that your measurements will be accurate and reliable. The satin-chrome finish not only provides durability but also enhances visibility during use. Additionally, the hardened and ground faces ensure long-lasting performance, allowing for consistent results over time.

What We Like
Highly accurate measurements
Durable satin-chrome finish
Easy jaw adjustment
Ratchet stop for precision
#TOP 6

Mitutoyo 177-178 Setting Ring for Micrometres

177-178
Mitutoyo 177-178 Setting Ring for Micrometres Cover
Mitutoyo 177-178 Setting Ring for Inside Micrometre, Holtest and Dial Bore Gage, Metric, 45 mm Size

The Mitutoyo 177-178 Setting Ring is designed for use with inside micrometres, holtest, and dial bore gauges. With a metric measurement of 45 mm, it provides precision and accuracy, ensuring your measurements are spot on. This setting ring is a valuable tool that enhances your measurement capabilities, allowing you to achieve consistent results in your work. Its compatibility with various measuring instruments adds to its versatility, making it an essential item for professionals and hobbyists alike.

What We Like
Precision measurement tool
Compatible with various instruments
Metric sizing
Versatile for different applications
#TOP 7

Mitutoyo 145-196 Inside Micrometre, 3-4 Inch

145-196
3-4"
Mitutoyo 145-196 Inside Micrometre, 3-4 Inch Cover
Mitutoyo 145-196 Inside Micrometre, 3-4" Range

The Mitutoyo Inside Micrometre is designed for high performance and ease of use. With its 3-4 inch range, this tool allows you to measure internal dimensions accurately, making it perfect for precision work. Its user-friendly design means you can operate it comfortably, ensuring you get the measurements you need without hassle. This micrometre is ideal for both professionals and hobbyists who value reliability and accuracy in their measurements.

What We Like
High performance
Easy to use
Accurate measurements
Ideal for precision work
#TOP 8

Mitutoyo 137-214 Tubular Inside Micrometre 2"-40"

137-214
2-40"
Mitutoyo 137-214 Tubular Inside Micrometre 2"-40" Cover
Mitutoyo 137-214 Tubular Inside Micrometre, Range 2"-40"

The Mitutoyo Inside Micrometre 137-214 is a precision tool designed for measuring internal diameters. This model comes in a fitted plastic case, ensuring safe storage and easy transportation. The range of 2"-40" allows you to tackle a variety of measuring tasks, making it versatile for different projects. Furthermore, the high-quality construction of Mitutoyo tools assures reliability, so you can trust the measurements you take. This combination of durability and convenience makes this micrometre an excellent choice for anyone needing precise internal measurements.

What We Like
Precision measuring tool
Comes in fitted case
Wide measurement range
Reliable construction
#TOP 9

Mitutoyo 137-203 Tubular Inside Micrometre 50-500 mm

137-203
Mehrfarbig
Mitutoyo 137-203 Tubular Inside Micrometre 50-500 mm Cover
Mitutoyo 137-203 Tubular Inside Micrometre, Range 50 mm-500 mm

The Mitutoyo Inside Micrometre is designed for precision measurements in a range from 50 mm to 500 mm. It comes in a fitted plastic case, ensuring that your tool is well-protected and easily accessible when you need it. This convenient casing allows you to transport the micrometre safely, making it ideal for both workshop and field use. Additionally, the series is known for its reliability, which means you can trust the accuracy of your measurements every time.

What We Like
Precision measurement capability
Fitted plastic case included
Reliable and accurate readings
Portable for various uses
#TOP 10

Starrett 824E Fixed Range Inside Micrometre

824E
7-8"
Starrett 824E Fixed Range Inside Micrometre Cover
Starrett 824E Fixed Range Vernier Inside Micrometre, 7-8" Range, 0.001" Graduation, +/-0.0001" Accuracy

The Starrett 824E Micrometre is designed for precision when measuring inside dimensions. Its vernier scale in inch units enables you to take accurate readings effortlessly. The adjustable sleeve and contacts allow for fine-tuning, ensuring that your measurements are spot on every time. With a knurled ring-type lock nut, you can secure your measurements, providing peace of mind during use. Additionally, the satin chrome finish not only resists rust but also reduces glare, making it easier for you to read the measurements.

What We Like
Highly accurate measurements
Easy to read vernier scale
Secure measurement locking
Rust-resistant finish
Comfortable heat-insulated handles
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is an inside micrometer?

The inside micrometer is the most direct measuring tool used for inspection (Figure 1). The total length of the inside micrometer is itself the overall length being measured. The inside micrometer is a much more accurate measuring tool for inside measurement than the caliper.

2. What is inside micrometer caliper?

An inside micrometer is a device designed to precisely measure things such as the inner diameter of holes. Where a standard micrometer might be used to measure the outer diameter of a bolt, an inside micrometer could be used to measure the inner diameter of a nut.

3. How do you calibrate an internal micrometer?

Select two standard ring gages within the range of the IUT. Insert the probe end of the IUT into the ring gage. Rotate the micrometer on the end of the IUT until contact is made with the standard ring. Continue to rotate the micrometer spindle until the ratchet clicks a minimum of three times.

Editor's Notes

During our inside micrometre research, we found 15 inside micrometre products and shortlisted 10 quality products. We collected and analyzed 1,614 customer reviews through our big data system to write the inside micrometres list. We found that most customers choose inside micrometres with an average price of £308.76.

The inside micrometres are available for purchase. We have researched hundreds of brands and picked the top brands of inside micrometres, including Mitutoyo, Accusize Industrial Tools, Starrett.

Written by
Kenneth Collin Avatar

Kenneth Collin graduated from Imperial College, London, at 22. He is a UX/UI designer, a web developer, and a writer, amongst others. At age 14, Kenneth programmed his first app. Kenneth's app served as a remote control for censored devices. "When I was 8, I would pick up scraps from electronics and try to rebuild or at least fix them," Kenneth said in one of his recent articles on Home repairs for top gadgets.