Mitutoyo 145-188 | Caliper Jaw Inside Micrometer | 75 to 100 mm, 0.01 mm
Part No. 145-188 | Range 75–100 mm | Graduation 0.01 mm | Accuracy ±8 µm
Product Overview
The Mitutoyo 145-188 is a caliper jaw inside micrometer designed for measuring internal dimensions across a 75–100 mm range. Its caliper-type jaws can reach into bores, internal grooves, recesses and slot widths that are difficult to measure with conventional outside micrometers.
The jaws are made from high-grade tool steel with carbide-tipped measuring faces. A spindle locking clamp helps secure the measured position when the micrometer needs to be withdrawn from a deep or awkward feature. The satin chrome thimble and sleeve provide a clear mechanical reading with 0.01 mm graduation.
The 145-188 is fully mechanical and does not require batteries. Before measurement, the micrometer should be set against a known reference. A setting ring or inside setting standard is required and is available separately.
For the next Series 145 measurement range, see the Mitutoyo 145-189 covering 100–125 mm.
Key Benefits
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Measures internal features across the 75–100 mm range.
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±8 µm accuracy with 0.01 mm graduation.
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Carbide-tipped measuring faces provide durable contact with the measured feature.
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Caliper-type jaws reach into bores, grooves, recesses and slots.
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Spindle locking clamp helps retain the measured setting during withdrawal.
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Satin chrome thimble and sleeve provide a clear mechanical reading.
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Fully mechanical operation requires no batteries.
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Supplied in a protective case for storage and transport.
Who This Product Is Best For
The Mitutoyo 145-188 is suitable for machine shops, hydraulic and pump repair workshops, valve manufacturing, maintenance operations and dimensional inspection environments in Kuwait.
It can be used by machinists checking internal dimensions during production, inspectors verifying first-off and finished components, and maintenance personnel measuring worn or replacement components with internal features within the 75–100 mm range.
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 the reference.
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Position the jaws slightly below the expected feature size and insert them into the bore, groove or internal feature.
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Open the jaws gradually until both measuring faces contact the feature. Rock the micrometer slightly to locate the correct maximum reading.
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Lock the spindle using the locking clamp, withdraw the micrometer if required, and read the thimble and sleeve.
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Compare the measurement with the applicable dimensional tolerance for the component.
Frequently Asked Questions
What is the Mitutoyo 145-188 used for?
The 145-188 is used to measure internal dimensions across 75–100 mm, including bore diameters, internal grooves, recesses and slot widths.
How accurate is the Mitutoyo 145-188?
The 145-188 has a stated accuracy of ±8 µm with a 0.01 mm graduation.
Does the 145-188 require a setting ring?
Yes. An inside micrometer should be set against a known reference before measurement. A suitable setting ring or inside setting standard is required and is available separately.
What is the measurement range of the 145-188?
The Mitutoyo 145-188 covers 75–100 mm. The adjacent 145-189 covers the next range of 100–125 mm.
Is the Mitutoyo 145-188 digital?
No. It is an analog, fully mechanical inside micrometer and does not require batteries.
What are the measuring faces made from?
The measuring faces are carbide tipped, while the caliper-type jaws are made from high-grade tool steel.
How much does the 145-188 weigh?
The main unit mass is 180 g based on the supplied product data.
How can I buy the Mitutoyo 145-188 in Kuwait?
Call Al Belad General Tech Services on +965 9807 4888 or email mathews@generaltechkuwait.com for pricing and delivery information.
