Best Inside Micrometers of 2025

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Inside micrometers are precision measuring instruments used to measure the internal dimensions of an object with high accuracy. They are commonly used in manufacturing and engineering industries for quality control and inspection purposes. Inside micrometers consist of a measuring head, a thimble, and a locking mechanism to hold the measurement in place. They come in various sizes and types, such as tubular, blade, and three-point, to accommodate different measurement needs. These tools are essential for ensuring the accuracy and quality of machined parts and products.
At a Glance: Our Top Picks
Top 10 Inside Micrometers
Mitutoyo Tublar Inside Micrometer
The Mitutoyo 139-201 Tublar Inside Micrometer is a versatile tool that can measure a wide range of ID measurements. It features a 1/2" travel mic head, clear graduations on a satin chrome finish mic head, and each extension tube is marked with its size. It comes with a fitted plastic case for easy storage and transport.
Shars Precision Inside Micrometer
Measure with precision using the Shars 0.2"-1.2" Inside Micrometer with a resolution of 0.0001". The micrometer comes with a range of 0.2-1.2" and an accuracy of 0.0002". The satin chrome reading surface finished on the barrel and thimble is glare-free and rust-resistant. The product also comes with a setting ring, wrench, and fitted case for convenient storage and use.
Accusize Industrial Tools Eg00-3221 Inside Micrometer
The Accusize Industrial Tools Eg00-3221 Inside Micrometer is an essential tool for precise measurements in mechanical engineering and machining. With a range of 0.2-1.2" and a graduation of 0.001", this micrometer offers accuracy of 0.00028", and a resolution of 0.0001". The satin-chrome finish gives a smooth and durable surface, while the hardened and ground faces ensure longevity. The ratchet stop and locking clamp make it easy to adjust the side movement of the jaw, providing more convenience and accuracy. Whether you are a professional machinist or a DIY enthusiast, the Accusize Inside Micrometer is a reliable and precise tool that will make your work more efficient and accurate.
Accusize Industrial Tools Inside Micrometer Set
The Accusize Industrial Tools Inside Micrometer Set features extension rods that provide a wide measuring range, with each interchangeable rod marked with its measuring range. It comes with a standard caliper gauge for zero setting and has an accuracy of Metric(3+n+L/50)μm, (n=number of rod, L=maximum. Measuring length (mm) [Inch]. The resolution is 0.0001". The set includes extension rods of 0.5", 1", 2", 4", 6", 8", and has a range of 2-24".
Starrett Solid-Rod Inside Micrometer Set - 2-12" Range
The Starrett Solid-Rod Inside Micrometer Set is a heavy-duty tool equipped with insulated rods and hardened and ground anvils. It provides accurate measurements and meets strong demands, making it an essential accessory for metalworking and woodworking industries. Starrett precision measuring tools exceed national and international standards, ensuring excellent performance for industrial, professional, and consumer markets worldwide.
Mitutoyo 137-213 Inside Micrometer
The Mitutoyo Inside Micrometer is an ideal tool for measuring the inside dimensions of cylinders, rings, and parallel surfaces. With its Vernier scale in inch units, you can take precise inside dimension (ID) measurements. The micrometer comes with interchangeable extension rods that allow for a diversified range of measurement. Its slow head travel helps provide fine positioning, which is useful for getting accurate readings. Additionally, the solid extension rods help provide durability, ensuring that the tool lasts for a long time. Overall, the Mitutoyo Inside Micrometer is a convenient tool for measuring inside dimensions with accuracy and precision.
Mitutoyo 141-001 Inside Micrometer
The Mitutoyo Inside Micrometer is an essential tool for precise measurements. It features interchangeable rods, allowing you to measure a variety of inside dimensions with ease. The vernier scale provides metric readings, ensuring accuracy for your specific needs. With a locking clamp, you can secure your measurements, making it easier to record and verify results. The satin chrome finish not only enhances durability but also helps prevent rust and glare, giving you a reliable and clear tool to work with.
Starrett 823EZ Tubular Inside Micrometer Set
The Starrett Tubular Micrometer is a robust tool designed for precision measurement. Its lightweight, rigid rods feature easy-to-read markings, making your measuring tasks simpler and more efficient. The hardened and ground anvils ensure durability and consistent performance, giving you confidence in your measurements. Additionally, the interchangeable anvils allow you to customize your gaging needs, providing versatility across various applications. Whether you are in metalworking or woodworking, this micrometer is an essential accessory that enhances accuracy and reliability in your projects.
Shars Inside Micrometer Set
The Shars Micrometer Set is a versatile and accurate tool for measuring inside dimensions. With a measuring range of 2-24", this set allows you to measure a wide range of objects with precision. The micrometer head, along with the included tubular extensions, provides flexibility in measuring different lengths. The accuracy of 0.00005" ensures reliable and precise measurements. The referenced setting standard and wrench make it convenient to set up and use. Whether you are working on machining projects or need precise measurements in your workshop, the Shars Micrometer Set is a reliable and convenient tool to have.
Fowler Inside Tube Micrometer 2-12"
The Fowler Inside Micrometer is designed for precise measurements with its micrometer head and a set of hardened extension rods. The microfine graduations allow you to take readings as accurate as 0.00005", which is perfect for detailed work. You’ll appreciate the quick zero adjustments, making it easy to ensure accurate starting points. Built with durable materials, the anvil and spindle are precision ground, ensuring longevity and reliability in your measurements. The coiled spring pressure contact rods help maintain consistent pressure, enhancing measurement accuracy and ease of use.
Frequently Asked Questions (FAQs)
1. What are the 3 types of micrometer?
There are various types of micrometers, including inside micrometers, bore micrometers, tube micrometers, and depth micrometers. Each type has a different measurable range, typically in increments of 25 mm, and it is important to use the appropriate micrometer for accurate measurements.
2. What is an outside micrometer used for?
An outside micrometer is primarily used for measuring the thickness or outside diameter of small parts. It is a commonly used tool in industries due to its high accuracy and ease of use.
3. How do you read a .0001 micrometer?
To read a .0001 micrometer, you need to use the additional scale called the Vernier scale. The Vernier scale consists of ten divisions marked on the sleeve, with each graduation representing .0001 inches. By aligning the lines on the Vernier scale with the lines on the sleeve, you can accurately determine the measurement.
4. What is different about reading an inside micrometer from an outside micrometer?
Reading an inside micrometer differs from reading an outside micrometer. Inside micrometers are used to measure the inside dimensions of holes, tubes, pipes, or grooves. They have jaws that expand and contract to provide accurate measurements. In contrast, outside micrometers resemble a clamp and are used to measure the thickness or diameter of a part.
During our inside micrometer research, we found 24 inside micrometer products and shortlisted 10 quality products. We collected and analyzed 3,207 customer reviews through our big data system to write the inside micrometers list. We found that most customers choose inside micrometers with an average price of $283.49.
The inside micrometers are available for purchase. We have researched hundreds of brands and picked the top brands of inside micrometers, including Mitutoyo, Shars, Accusize Industrial Tools, Starrett, Fowler. The seller of top 1 product has received honest feedback from 6,271 consumers with an average rating of 4.8.

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.