Mitutoyo 345-351-30 Digimatic Inside Caliper Micrometer, Range 1 - 2" (25.4 - 50.8 mm)
Part Number: Mitutoyo 345-351-30
The Mitutoyo 345-351-30 Digimatic inside micrometer measures small bores, grooves and internal widths from 1"–2" (25.4–50.8 mm). Its caliper-type jaws are designed for short internal features, while the digital readout provides a clear 0.00005" / 0.001 mm resolution measurement.
Carbide measuring faces provide wear resistance, while the constant measuring-force device helps produce repeatable results between operators. Inch/Metric switching supports both measurement standards, and the Digimatic data output allows readings to be transferred to data loggers or SPC software.
Typical applications include bearing housings, internal grooves, slots and short bores. Before measurement, set the micrometer using an appropriate inside-length standard such as a setting ring or optional Inside Micro Checker. For precision work, allow the instrument and workpiece to reach the same temperature before taking the final measurement.
For smaller measurement ranges, the Mitutoyo 345-350-30 covers 0.2"–1.2". The mechanical Mitutoyo 145-194 is an alternative for the same 1"–2" range.
Key Benefits
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Digital readout — 0.00005" / 0.001 mm resolution without reading mechanical scales.
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Constant measuring force — helps provide consistent measurements between operators.
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Carbide measuring faces — provide wear resistance and long service life.
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SPC-ready — Digimatic data output supports quality records and data logging.
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Inch/Metric switching — supports both drawing and measurement standards.
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Caliper-type jaws — reach short bores, grooves and internal slots.
Ready to order the Mitutoyo 345-351-30? Call or WhatsApp +965 9807 4888 for a fast quote.
Who This Product Is Best For
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QC inspectors checking groove widths and short internal bores.
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Machinists measuring 1"–2" internal features.
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Maintenance teams working with machine components and internal features.
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Laboratories recording inside measurements for SPC applications.
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Buyers upgrading from mechanical inside micrometers to a Digimatic model.
How to Use
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Set the micrometer using a suitable setting ring or Inside Micro Checker within the required range.
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Insert the caliper-type jaws into the bore, groove or internal feature.
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Rock the instrument gently to locate the maximum reading.
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Allow the constant measuring-force device to apply the measuring pressure.
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Read the value on the digital display or transfer it to a data logger if required.
Frequently Asked Questions
What range does the Mitutoyo 345-351-30 Digimatic inside micrometer measure?
It measures internal features from 1"–2" (25.4–50.8 mm).
Is a setting ring included?
No. An inside-length standard such as a setting ring or Inside Micro Checker is optional and is used to set the micrometer before measurement.
What are the measuring faces made of?
The measuring faces are made of carbide for wear resistance and long service life.
Does it have data output?
Yes. The Digimatic data output can connect to compatible Mitutoyo data loggers and SPC software.
Which model should I choose if my part is outside the 1"–2" range?
Choose a model whose measuring range brackets the required internal dimension. The 345-351-30 covers 1"–2", while the Mitutoyo 345-350-30 covers 0.2"–1.2".
Can the Mitutoyo 345-351-30 be recalibrated?
Yes. The micrometer can be periodically recalibrated through an ISO/IEC 17025-accredited calibration service to maintain measurement traceability.
How should I store and care for it?
Clean the measuring faces after use, store the instrument in its case away from direct sunlight and coolant, and avoid dropping it. Check the zero before use and schedule periodic calibration to maintain traceability.
How do I order the Mitutoyo 345-351-30 Digimatic inside micrometer in Kuwait?
Pricing is quote-based. Call or WhatsApp +965 9807 4888 with the model number and quantity for price and availability.
For pricing, availability or to place an order, call or WhatsApp +965 9807 4888.
