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This section provides an overview for inside micrometers as well as their applications and principles. Also, please take a look at the list of 10 inside micrometer manufacturers and their company rankings. Here are the top-ranked inside micrometer companies as of March, 2025: 1.Accusize Industrial Tools, 2.Mitutoyo America Corporation, 3.L.S. Starrett Company.
Table of Contents
An inside micrometer is a precision measuring instrument designed to measure the inside diameter of hole shapes. It typically features three variations: a three-point measuring instrument for inside diameter, a dial gauge type measuring the extent of element push-in, and a rod-shaped version for measuring larger diameters. Some instrument manufacturers may use the term "Inside Micrometer" exclusively for the rod-shaped type that measures by two-point contact.
Inside micrometers are primarily used in the manufacturing, quality control, and product development of industrial metal products. They are crucial for measuring not just circular inside diameters but also groove widths and distances. However, due to their structural limitations, they are not suitable for measuring very small diameters or dimensions, where alternative instruments like pin gauges or image measurement systems are recommended.
The inside micrometer operates by making direct contact with the inside diameter of a hole and reading the distance between the measuring elements. The measurement is typically read from a micrometer or a dial gauge. Rod-shaped inside micrometers measure the inside diameter based on the screw's forward or backward movement. They lack a ratchet, thus requiring careful application of measuring pressure. The 3-point inside micrometer uses a conical transducer to convert screw movement into the opening and closing of the measuring element, typically equipped with a ratchet for consistent measuring pressure.
This type of inside micrometer measures by inserting the measuring element into the bore and reading the micrometer attached to the spindle. Three-point measuring instruments are known for stable measurements but have a limited measuring range.
The rod-shaped inside micrometer measures the inside diameter by contacting the bore with both ends of the instrument. Accurate measurement requires careful positioning and practice.
Cylinder gauges are two-point contact instruments with readings provided by a dial gauge or a digital display. They allow for constant measuring pressure but require attention to the tilt between contact points.
Note that some inside micrometers may also refer to air micrometers and electric micrometers, which measure non-contactually by detecting the gap between the probe and the hole using air or electrical means.
*Including some distributors, etc.
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L.S. Starrett Company is a manufacturer of precision tools and instruments established in 1880 and based in Massachusetts, United States. It specializes in manufacturing precision measuring tools like micrometres, callipers, bevel vernier protractors, dial indicators, and granite surface plates. The company is in compliance with the RoHS standards and has acquired several certifications, including ISO 9001:2015, ISO/IEC 17025:2017, and ANSI/NCSL Z540.1-1994. Its manufactured products are utilized for metalworking, automotive, aviation, marine, and farm industries across America.
Mitutoyo America Corporation was founded in Aurora, Illinois in 1963 by Mitutoyo Corporation of Japan as its American sales, marketing, and service subsidiary. The company provides parts service, manufacturing, and turnkey solutions for metrology equipment for aerospace, alternative energy, automotive, semiconductor, and other industries. The company’s product offerings include coordinate measuring machines, sensor systems, test equipment, and vision measuring equipment customized for customer needs. The company’s services include calibration and repair, installation, contract part programming, and training and education for operation as well as calibration.
DAI-ICHI Sokuhan Works Co, founded in 1944 is based in Ojiya, Japan, and is a manufacturer and supplier of machinery tool accessories. Their product portfolio includes measuring instruments, air micrometers, electronic micrometers, gauges, precision machine parts, spindle units, and kneading dispersibility measurement. The products are manufactured under superior technology and precision with quality control. The products are used in multiple industries which include aircraft, trains, automobiles, and other modes of transportation.
Prism Test and Measure Private Limited, established in 1994 in Ahmedabad, Gujarat, India, is a manufacturer of measuring instruments. The company specializes in manufacturing various products, including digital multimeters, oscilloscopes, function generators, and power supplies. These advanced measurement and testing instruments provide precise and stable results, making them invaluable for engineers, technicians, and researchers. The instruments find applications across various industries, including electronics, telecommunications, automotive, and research institutions. These instruments play an important role in ensuring quality control, troubleshooting, and research in various technological domains for their precision. The company also offers customized instrumental solutions tailored to specific industrial applications.
HoverLabs has roots dating back to 1963 and is headquartered in Haryana, India. The company is a laboratory supplies manufacturer, exporting to over 110 countries. The company provides extensive R&D for designing, manufacturing, and packaging supplies. The company also provides customized product development, OEM support, and project management assistance. The company’s products include educational equipment, analytical lab equipment, engineering lab equipment, medical lab equipment, and other products used in the medical as well as scientific industries.
Mahr Inc., founded in 1861 and located in Rhode Island, United States, is a supplier of production metrology, rotary stroke bearings, gear metering pumps, and meter mix dispense technology. The company offers a range of products, including handheld gages, stereo-zoom microscopes, planetary spinning pumps, spin finish metering pumps, and the N500 ball cage, that cater to various industries including automotive, aerospace, medical, and energy. Mahr Inc.'s metrology systems include coordinate measuring machines, optical measuring machines, contour measuring machines, and gear measurement systems to meet the stringent requirements of industries.
Anyi Instrument Co. Ltd, established in 2005 and headquartered in Guilin, China, is a manufacturer and supplier of precision measuring instruments. The company's product range includes standard reference artifacts, precision step gauges, swivel supports, gauge blocks, and various types of calipers, catering to diverse industries such as manufacturing, research, and precision measurement. The company’s services include design and engineering, manufacturing, and technical support. The company also holds ISO9001:2000 certification, reflecting its passion for delivering quality measuring instruments.
Asimeto is a German-based manufacturing and supply firm that was established in 2007 and its headquarters are located in Germany. The company specialize in measurement tools, offering a diverse product range including calipers, micrometers, and gauges. Asimeto's precision instruments find application in industries such as manufacturing, engineering, and quality control, aiding accurate measurements. They play a vital role in ensuring dimensional accuracy and quality assurance. With an attention on precision and reliability, Asimeto subsidizes significantly to the field of metrology and measurement technology.
Accusize Industrial Tools was born in Toronto, Canada in 2008. Accusize is a distributor of measuring tools, cutting tools, and machine tools for metalworking companies. A portion of offerings that Accusize offers includes collet blocks, expanding arbors, air tools, power tools, die maker tools, annular cutters, bore gages, boring bars, boring heads, BT40 tooling, CAT40 tooling, calibration, layout, & machine setting tools, calipers & attachments, carbide inserts, end mills, force gauges, and metrology and material testing equipment.
Ranking as of March 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Accusize Industrial Tools |
18.0%
|
| 2 | Mitutoyo America Corporation |
14.8%
|
| 3 | L.S. Starrett Company |
13.1%
|
| 4 | HOVERLABS |
11.5%
|
| 5 | Anyi Instrument Co. Ltd |
9.8%
|
| 6 | Prism Test And Measure Private Limited |
8.2%
|
| 7 | Limit |
8.2%
|
| 8 | Asimeto |
8.2%
|
| 9 | DAI-ICHI SOKUHAN WORKS CO. |
4.9%
|
| 10 | Mahr Inc. |
3.3%
|
Derivation Method
The ranking is calculated based on the click share within the inside micrometer page as of March 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
2 | 33.3% |
|
India
|
2 | 33.3% |
|
Japan
|
1 | 16.7% |
|
Canada
|
1 | 16.7% |
58 products found
58 products
Sanwa Creation Co., Ltd.
310+ people viewing
Very Fast Response
This is a carbide pin gauge that enables accurate inner diameter measurement with micron order. The super -class class can be used as a master pin ...
Sanwa Creation Co., Ltd.
300+ people viewing
Last viewed: 22 hours ago
Very Fast Response
A very small -diameter pin gauge that enables high -precision extremely small inner diameter measurement. The material of the holder is resin or SU...
Sanwa Creation Co., Ltd.
400+ people viewing
Last viewed: 1 minute ago
Very Fast Response
A very small diameter pin gauge that enables the inner diameter measurement of the high -precision extremely small hole. It is an integrated type i...
Mahr Inc.
450+ people viewing
Last viewed: 17 hours ago
Standard Response
5.0 Company Review
■2-point internal micrometer Exemplary high quality with matte chrome controls and display Suitable for measuring large diameters up to 2,500mm Th...
10 models listed
Mahr Inc.
690+ people viewing
Last viewed: 16 hours ago
Standard Response
5.0 Company Review
■3-point inner micrometer bore measurement - fast and flexible Available as a quick measuring device with scale plate or digital display, or pistol...
10 models listed
Tosho Seiko Co., Ltd.
160+ people viewing
Last viewed: 1 day ago
Standard Response
■Internal measuring bar gauge Specially designed to withstand use under harsh conditions, it is ideal for on-site work such as construction work, b...
Minamiya Seisakusho
590+ people viewing
It enables stable and accurate dimensional measurement (comparative measurement) for all inner diameter and outer diameter. You can slide the arm a...
2 models listed
CITIZEN FINEDEVICE CO.,LTD.
180+ people viewing
Last viewed: 22 hours ago
■Outer diameter/inner diameter Lineup of horizontal stands that can measure the outer and inner diameters of products ■Extreme By installing the S...
Mahr Inc.
240+ people viewing
Last viewed: 3 hours ago
Standard Response
5.0 Company Review
■Multimar - Application Specialist Whether centering on shoulders, narrow collars or recesses: the Multimar 36B universal measuring instrument is t...
2 models listed
Mahr Inc.
330+ people viewing
Last viewed: 1 hour ago
Standard Response
5.0 Company Review
■Multimar - Application Specialist Whether gears, threads, tapers or recesses: Multimar universal measuring instruments are the perfect solution fo...
10 models listed
DAI-ICHI SOKUHAN WORKS CO.
100+ people viewing
Standard Response
Purpose ■Leaf type inner diameter measuring head This is a contact type measuring head that uses a plate spring with carbide balls. Suitable for me...
Tool System Co., Ltd.
100+ people viewing
Teclock
90+ people viewing
Last viewed: 1 day ago
Standard Response
Teclock
90+ people viewing
Last viewed: 6 hours ago
Standard Response
Teclock
110+ people viewing
Standard Response
Baba Naga Hardware Co., Ltd.
20+ people viewing
Last viewed: 14 hours ago
■Features When measuring circular holes, errors occur due to the thickness of the gauge body. A convenient inner diameter correction table is attac...
Teclock
100+ people viewing
Standard Response
Teclock
90+ people viewing
Last viewed: 1 day ago
Standard Response
Teclock
90+ people viewing
Last viewed: 1 day ago
Standard Response
Teclock
90+ people viewing
Standard Response
Teclock
100+ people viewing
Last viewed: 11 hours ago
Standard Response
Teclock
90+ people viewing
Last viewed: 1 hour ago
Standard Response
Teclock
90+ people viewing
Last viewed: 1 day ago
Standard Response
