Description
Product Overview
The Mitutoyo QuantuMike 293-140-30 is a 0–25mm digital outside micrometer built around Mitutoyo’s fast-feed thimble mechanism — a genuine workhorse instrument for any toolroom, production floor, or serious home shop. Where a standard micrometer advances 0.5mm per thimble revolution, the QuantuMike moves 2mm per revolution, meaning you’re on your reading in a fraction of the time without sacrificing resolution or accuracy. Paired with Mitutoyo’s proven Digimatic display and an IP65 coolant-proof rating, this is a bench micrometer that earns its keep in real cutting environments.
- 2mm-per-revolution fast-feed thimble — The QuantuMike’s signature feature. At 2mm/rev versus the conventional 0.5mm/rev, you spend less time spinning and more time measuring. On a production run where you’re pulling parts every few minutes, this adds up to real time savings without any compromise to the 0.001mm resolution you need for close-tolerance work.
- IP65 coolant-proof construction — Rated to resist coolant splash and swarf ingress, so it survives on the bench next to a lathe or mill without the full quarantine ritual you’d apply to a standard digital mic. Not submersible, but genuinely shop-floor durable rather than lab-only.
- 0.001mm resolution / ±0.002mm accuracy — Resolution down to a micron and accuracy across the full 0–25mm range that meets the demands of toolmaking, fixture building, and close-tolerance turned work. The Digimatic output is clean and repeatable, with ZERO/ABS and HOLD functions that machinists actually use.
- Digimatic SPC output compatibility — The 293-140-30 carries Mitutoyo’s standard Digimatic port, compatible with the full range of Mitutoyo data cables, SPC multiplexers, and statistical process control systems. Relevant if you’re feeding measurements into quality documentation or running SPC on a production cell.
- Ideal for — Checking turned shaft diameters, verifying ground stock before grinding allowance, incoming inspection of bar stock, setting tool offsets at the lathe, pre-inspection of close-tolerance bore fits, and production-run part checking where speed of measurement matters alongside accuracy.
Condition
(Used — Good Condition / Well Used, Fully Functional)
This QuantuMike has seen genuine shop use and that’s reflected in its appearance — there are visible scratches across the plastic frame and body, consistent with regular bench handling and storage. There is also a small cosmetic mark inside the LCD screen area; this does not obscure the digit readout and does not affect the numerical display under normal bench lighting. The anvil, spindle face, and thimble mechanism are the surfaces that matter mechanically, and these are functioning correctly — the fast-feed thimble engages smoothly, the ratchet stop operates consistently, and the instrument reads with the repeatability you’d expect from a well-maintained Mitutoyo. The cosmetic wear is exactly that — cosmetic. It has no bearing on measuring performance. As with any used precision instrument, we recommend verifying zero against a known ground reference or 25mm setting standard before putting this into critical production use. A quick check against a grade 1 slip gauge stack will confirm it’s reading true across the range.
Included:
- 1 x Mitutoyo QuantuMike 293-140-30 digital outside micrometer, 0–25mm, 0.001mm resolution
- 1 x Plastic carry case (original Mitutoyo moulded case)
Not included:
- Setting spanner / wrench
- Calibration certificate / inspection papers
- 25mm setting standard / reference standard
Brand Information
Mitutoyo Corporation is Japan’s pre-eminent precision metrology manufacturer and one of the most respected names in dimensional measurement globally, sitting at the top tier of the market alongside Mahr, Tesa, and Starrett. Founded in 1934 in Kawasaki, Japan, Mitutoyo produces the full spectrum of precision measurement instruments — from slip gauges and CMMs through to indicators, micrometers, and surface roughness testers — to exceptionally consistent quality standards. In Australian toolrooms and machine shops, Mitutoyo is the default benchmark: when a machinist says “grab the mic,” there’s a reasonable chance it’s a Mitutoyo, and for good reason.
Specifications
| Feature | Specification |
|---|---|
| Brand | Mitutoyo |
| Model | QuantuMike 293-140-30 |
| Type | Digital outside micrometer (fast-feed) |
| Series | 293 — QuantuMike |
| Measuring Range | 0–25mm |
| Resolution | 0.001mm (1 micron) |
| Accuracy | ±0.002mm |
| Thimble Advance Rate | 2mm per revolution (vs. 0.5mm conventional) |
| Display | LCD Digimatic digital readout |
| Functions | ZERO/ABS, HOLD, ORIGIN, mm only (293-140-30) |
| IP Rating | IP65 — coolant proof / splash resistant |
| SPC Output | Mitutoyo Digimatic (compatible with standard SPC data cables) |
| Frame Material | Heat-treated steel frame, carbide-tipped anvil and spindle |
| Country of Origin | Japan |
| Condition | Used — Good Condition / Well used, fully functional, cosmetic wear to plastic body and minor mark inside screen |
| Included | Micrometer, plastic carry case |
| Not Included | Setting spanner, calibration certificate, 25mm setting standard |
Keywords
Mitutoyo QuantuMike 293-140-30, Mitutoyo digital micrometer, Mitutoyo outside micrometer, QuantuMike 0-25mm, digital micrometer 0-25mm, fast feed micrometer, IP65 micrometer, Digimatic micrometer, toolroom micrometer Australia, precision micrometer machinist, used Mitutoyo micrometer, outside mic 25mm
