Description
Product Overview
The Mitutoyo QuantuMike 293-141-30 is a 25–50mm digital outside micrometer built for toolroom-grade measurement where speed and accuracy aren’t negotiable. Featuring Mitutoyo’s high-speed spindle mechanism — four times faster than a conventional thimble — the QuantuMike gets you to your reading quickly without sacrificing the 0.001mm resolution and IP65 coolant-proof protection that make it a credible production floor instrument. This is a metre-range mic that earns its place on the bench next to a surface plate, not just in a drawer.
- High-speed spindle (4× standard advance rate) — The QuantuMike’s spindle advances at approximately 3.2mm per thimble revolution rather than the conventional 0.5mm. In practice, this means less time winding down to your workpiece and more time cutting chips. Particularly valuable when checking a run of turned parts where you’re opening and closing the mic dozens of times a shift.
- IP65 coolant-proof rating — Sealed against coolant splash, swarf, and workshop grime. A standard digital mic can fail progressively when exposed to water-soluble coolant; the IP65 housing on this instrument protects the encoder and electronics at the machine rather than requiring you to walk back to a dry bench before measuring.
- 0.001mm resolution with ABS/INC and HOLD functions — Absolute (ABS) origin memory means the mic retains its zero reference after the battery is changed or the power cycles, which eliminates the common frustration of re-zeroing on a setting standard mid-job. The HOLD function locks the display for measuring in awkward positions — useful when checking bore depths or internal shoulders where you can’t read the display in situ.
- Setting standard included — The 25mm setting standard (gauge block-grade reference cylinder) allows you to verify and set the instrument’s zero before use. Without a traceable reference, even a mechanically perfect mic is just a number generator. Having this in the kit means you can calibrate against a known ground reference without sourcing a separate standard.
- Ideal for — Checking turned shaft diameters and shoulder widths on the lathe, verifying ground stock and precision bar to size before setup, incoming inspection of purchased components, four-jaw chuck and steady rest setup on a manual lathe, and first-article inspection of CNC-turned parts in the 25–50mm range.
Condition
(Used — Good Condition / Pre-owned, functionally sound)
The micrometer presents in good used condition consistent with careful workshop service. The anvil and spindle faces — the two surfaces that directly determine measurement accuracy — show no visible pitting, grooving, or deformation; the critical contact surfaces appear clean and flat. The frame carries light surface patina and minor handling marks typical of a bench instrument that has seen regular use, but there is no structural damage, cracking, or distortion to the frame or thimble. The digital display functions clearly, the ORIGIN, ZERO/ABS, and HOLD buttons are all responsive, and the spindle advances and retracts smoothly with no detectable slop or drag in the barrel. The IP65 sealing appears intact with no visible damage to the housing seams.
As with any used precision instrument, verification against the included setting standard before putting it into production use is strongly recommended. Zero the mic on the 25mm setting standard, confirm the display reads within ±0.002mm, and check for repeatable closure across three or four cycles on the standard to confirm spindle and ratchet consistency. If you require a current NATA-traceable calibration certificate, that is not included and would need to be arranged independently — however, for the vast majority of toolroom and production applications, self-verification against the setting standard is entirely appropriate.
Included:
- 1 × Mitutoyo QuantuMike Digital Outside Micrometer, 25–50mm, 0.001mm resolution (Model 293-141-30)
- 1 × Original Mitutoyo plastic carry case
- 1 × 25mm setting standard (gauge reference cylinder)
Not included: NATA calibration certificate, spare battery (CR2032 — readily available)
Brand Information
Mitutoyo Corporation, founded in Japan in 1934, is the global benchmark in dimensional metrology — the name machinists reach for when accuracy isn’t up for compromise. Their instruments are manufactured in Japan to tolerances that meet or exceed ISO and JIS standards, and Mitutoyo equipment is routinely found in NATA-accredited calibration laboratories, aerospace toolrooms, and production lines worldwide. Within the precision measuring instrument market, Mitutoyo sits at the top tier alongside Mahr and Tesa, and is broadly considered the industry standard against which other brands are judged — not merely a premium option but the reference point itself.
Specifications
| Feature | Specification |
|---|---|
| Brand | Mitutoyo |
| Model | 293-141-30 |
| Series | 293 — QuantuMike |
| Type | Digital Outside Micrometer |
| Measuring Range | 25–50mm |
| Resolution | 0.001mm |
| Accuracy | ±0.001mm (per Mitutoyo specification) |
| Spindle Advance Rate | 3.2mm per revolution (4× standard speed) |
| Display | LCD digital readout with ABS/INC and HOLD functions |
| IP Rating | IP65 — Coolant proof |
| Output | No data output port (non-SPC version) |
| Battery | CR2032 lithium (not included) |
| Construction | Hardened steel anvil and spindle, carbide-tipped measuring faces |
| Country of Origin | Japan |
| Condition | Used — Good Condition |
| Included Items | Micrometer, original carry case, 25mm setting standard |
| Not Included | NATA calibration certificate, spare battery |
Keywords
Mitutoyo 293-141-30, Mitutoyo QuantuMike, Mitutoyo digital micrometer 25-50mm, digital outside micrometer, QuantuMike IP65, outside mic 50mm, digital micrometer 0.001mm, toolroom micrometer Australia, precision measuring tools Australia, machinist micrometer, bore mic, CNC inspection micrometer
