Mitutoyo 145-220 Caliper Jaw Inside Micrometer 275-300mm
Part No. 145-219 | Range 250–275 mm | Graduation 0.01 mm | Accuracy ±12 µm
Product Overview
The Mitutoyo 145-219 caliper jaw inside micrometer is designed for measuring large internal dimensions such as bore diameters, housing recesses, internal grooves and slot widths across a 250–275 mm range. Its caliper-type jaws allow direct measurement of internal features that can be difficult to access with conventional outside micrometers.
The jaws are made from high-grade tool steel with carbide-tipped measuring faces for resistance to wear during regular inspection work. A locking clamp secures the spindle after measurement, allowing the micrometer to be withdrawn from a deep or awkward bore while retaining the reading.
The satin chrome thimble and sleeve provide an analog reading with 0.01 mm graduation. The fully mechanical design requires no battery, making the instrument suitable for routine dimensional inspection in machine shops, maintenance environments and manufacturing applications.
A setting ring or inside setting standard of known size is required to set the micrometer before measurement and is available separately.
For larger internal features, see the Mitutoyo 145-220, which covers a 275–300 mm range.
Key Benefits
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Measures internal bores, grooves and slots across 250–275 mm.
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±12 µm accuracy with 0.01 mm graduation.
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Carbide-tipped measuring faces provide resistance to measuring-face wear.
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Caliper-type jaws provide access to large and difficult-to-reach internal features.
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Locking clamp secures the spindle after taking a measurement.
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Satin chrome thimble and sleeve provide an analog mechanical reading.
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No battery required.
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Supplied with a protective case.
For pricing and availability of the Mitutoyo 145-219 in Saudi Arabia, call +966 53 132 1586.
Who This Product Is Best For
The Mitutoyo 145-219 is suitable for machine shops, hydraulic and pump repair workshops, valve manufacturing, heavy-equipment maintenance and dimensional inspection applications. It can be used by machinists, maintenance engineers and quality-control personnel measuring large internal features on pump casings, gearbox housings, flanges, fabricated components and other machined parts.
Its 250–275 mm range makes it useful when measuring large internal dimensions that require an inside micrometer with extended measurement capability and direct mechanical reading.
How to Use
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Set the micrometer against a setting ring or inside standard of known size and adjust the sleeve to match.
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Close the jaws slightly below the expected feature size.
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Insert the jaws squarely into the bore, groove or internal feature.
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Open the jaws gradually until both measuring faces contact the walls.
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Rock the micrometer slightly where appropriate to locate the maximum reading.
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Lock the spindle with the clamp if the reading needs to be retained while withdrawing the tool.
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Read the measurement from the thimble and sleeve.
Frequently Asked Questions
What is the Mitutoyo 145-219 used for?
The Mitutoyo 145-219 is used to measure large internal dimensions, including bore diameters, internal grooves and slot widths within its 250–275 mm range.
How accurate is the Mitutoyo 145-219?
The 145-219 has a stated accuracy of ±12 µm with a 0.01 mm graduation.
What is the measuring range of the 145-219?
The measuring range is 250–275 mm.
Does the Mitutoyo 145-219 require a setting ring?
Yes. An inside micrometer should be set against a reference of known size before measurement. The setting ring or inside setting standard is sold separately.
Is the Mitutoyo 145-219 digital?
No. The 145-219 is an analog, fully mechanical inside micrometer and does not require a battery.
What type of measuring faces does the 145-219 have?
The micrometer has carbide-tipped measuring faces on its caliper-type jaws.
What is the difference between the Mitutoyo 145-219 and 145-220?
The 145-219 covers 250–275 mm, while the 145-220 covers 275–300 mm. Select the model according to the internal dimension being measured.
How do I buy the Mitutoyo 145-219 in Saudi Arabia?
Call General Tech Services on +966 53 132 1586 or email mathews@generaltechsaudi.com to request pricing and delivery information.
