Mitutoyo 293-340-30 Digital Micrometer 0-1in - Precise, Coolant-Proof

Our review of the Mitutoyo 293-340-30 finds it best suited to machinists, maintenance techs and inspection personnel who need a compact, reliable outside micrometer for routine shop work. The bottom line: this is a coolant-proof digital micrometer that delivers repeatable measurements with a very fine 0.00005in (0.001mm) resolution and tight +/-0.00005in accuracy, making it a clear choice when accuracy and durability in harsh environments are the priority.

Key Features

• High resolution: The 0.00005in (0.001mm) resolution makes fine adjustments and comparisons easy when measuring small outside diameters.
• Reliable accuracy: With stated +/-0.00005in accuracy, it holds tolerance for inspection tasks where consistent readings matter.
• Coolant-proof construction: IP65 ingress protection and oil-resistant plastics mean it keeps functioning in dusty or wet workshop conditions.
• Dual-unit display: The LCD switches between inch and metric readouts, speeding work for shops that use both unit systems.
• Carbide faces and ratchet stop: Carbide-tipped measuring faces increase wear life while the ratchet stop supplies uniform contact pressure for repeatability.

Who It's For

This micrometer is aimed at professionals and serious hobbyists who measure outside diameters from 0 to 1in and need a tool that tolerates coolant, oil, and shop dust. It is particularly useful where readability is important, as the digital LCD display helps operators who prefer clear numerical readouts over analog dials.

Those who only need occasional rough measurements or who require a larger measuring range should look elsewhere; this model covers the 0-1in span only and is optimized for precision rather than broad-range versatility.

Pros & Cons

Pros

• Excellent readability and usability thanks to the digital LCD display.
• Durable construction with carbide-tipped faces and oil-resistant plastics for workshop resilience.
• High resolution and accurate readings make it suitable for inspection and precision work.

Cons

• Limited measuring range of 0-1in means additional micrometers are required for larger parts.

Specifications

Model	293-340-30
Measuring range	0 - 1in (0 - 25.4mm)
Resolution	0.00005in (0.001mm)
Accuracy	+/-0.00005in
Display	LCD, inches and metric
Protection	IP65 (coolant-proof)
Special features	Carbide-tipped faces, ratchet stop, oil-resistant plastics

Our Verdict

The Mitutoyo 293-340-30 is a solid, coolant-proof digital micrometer for professionals who need precise outside diameter measurements in challenging workshop environments. Its combination of fine resolution, durable construction and an easy-to-read LCD makes it good value for anyone who regularly inspects small parts and values repeatable, trustworthy results.

Frequently Asked Questions

Is this micrometer suitable for use with coolant or in wet environments?
Yes, it meets IP65 ingress protection and uses oil-resistant plastics, so it is designed to resist coolant and dust common in shop settings.

Can it display both inches and metric units?
Yes, the LCD shows readings in inches and metric for quick unit switching on the fly.

How durable are the measuring faces?
The measuring faces are carbide-tipped for improved wear resistance in normal shop use.