Description
Product Overview
The Mitutoyo 193-112 is a 25–50mm outside micrometer with an integrated mechanical digit counter — a tool built for machinists who want fast, unambiguous readings without squinting at vernier lines. The rolling digit display eliminates interpolation error on the sleeve and suits the kind of high-repetition measuring work where thimble misreading costs time and scrapped parts. Japanese-built to Mitutoyo’s exacting toolroom standards, this is a bench instrument that earns its keep on a production floor or in a serious home shop.
- Mechanical digit counter (0.001mm resolution) — The rolling counter reads directly in millimetres and hundredths, bypassing the need to read sleeve graduations and mentally add the thimble. In high-cycle measuring environments — incoming inspection, turned diameter checks, shaft fits — this pays back its premium in eliminated reading errors and faster throughput.
- 25–50mm measuring range — Covers the most common mid-range shaft, boss, and bearing-seat diameters encountered on the lathe or surface grinder. A 0–25mm mic handles small work; this one picks up where it leaves off and takes you through M30–M48 bolt bosses, bearing journals, and chuck jaw register fits.
- 0.001mm (1 micron) graduation — At one thou of a millimetre, this instrument resolves tolerances well inside most h6/H7 fits and is more than adequate for ISO general tolerance work, toolroom fits, and pre-grind stock allowance checks.
- Carbide-tipped anvil and spindle faces — Mitutoyo fits the 193-series with hardened and lapped carbide measuring faces. Carbide resists the wear that kills flat-face accuracy on a plain steel mic, meaning the instrument holds its calibration longer under regular production use.
- Ideal for — Checking turned shaft diameters to drawing tolerance, measuring bearing journal fits before pressing, verifying ground-stock OD before hardening, pre-measurement checks on CNC turned components, and incoming inspection of fastener and pin ODs in the 25–50mm range.
Condition
Used (Like New / Full Kit, Minimal Use)
This micrometer presents in excellent used condition with clear evidence of only light prior use. The carbide measuring faces are clean, flat, and free from visible pitting, scoring, or contact damage — the surfaces that determine accuracy are in sound shape. The frame finish retains the majority of its original lacquer with only minor handling marks consistent with careful bench use; no corrosion, no impact damage, and no distortion to the frame. The thimble and sleeve operate smoothly with good feel throughout the range, the ratchet stop functions correctly, and the digit counter rolls cleanly without sticking. The lock nut engages positively. As with any used precision instrument, verification against a 25mm setting standard (ring gauge or certified gauge block stack) before putting it into production is standard workshop practice — not a flag on this particular tool, just sound metrology habit.
Included:
- 1 x Mitutoyo 193-112 Outside Micrometer, 25–50mm, 0.001mm, Digit Counter
- 1 x Original Mitutoyo fitted case
- 1 x 25mm setting standard / reference gauge
- 1 x Original paperwork / warranty documentation (Japanese language)
- Original accessories as supplied by Mitutoyo
Not included: No additional setting standards or calibration certificates beyond original kit contents.
Brand Information
Mitutoyo Corporation, founded in Japan in 1934, is the world’s largest manufacturer of precision measuring instruments and the benchmark brand against which all other metrology tooling is measured — literally and figuratively. Their micrometers, vernier callipers, and dial indicators are standard issue in aerospace, automotive, and precision engineering facilities globally, sitting in the same tier as Mahr and Tesa for quality and well above import-grade tooling. Made in Japan, calibrated to DIN/JIS standards, and backed by a global service and recalibration network — Mitutoyo is a name that needs no qualification on an Australian shop floor.
Specifications
| Feature | Specification |
|---|---|
| Brand | Mitutoyo |
| Model | 193-112 |
| Type | Outside Micrometer with Mechanical Digit Counter |
| Series | 193 (Digit Micrometer Series) |
| Measuring Range | 25–50mm |
| Graduation / Resolution | 0.001mm (1 micron) |
| Accuracy | ±0.002mm (per Mitutoyo specification) |
| Display Type | Mechanical rolling digit counter |
| Anvil / Spindle Faces | Carbide-tipped, hardened and lapped |
| Frame Material | Cast iron frame with heat-insulating thimble grip |
| Lock Nut | Yes |
| Ratchet Stop | Yes |
| Country of Origin | Japan |
| Condition | Used (Like New) |
| Included Items | Fitted case, 25mm setting standard, original paperwork and accessories |
| Not Included | No third-party calibration certificate |
Keywords
Mitutoyo 193-112, Mitutoyo digit micrometer, outside micrometer 25-50mm, Mitutoyo outside micrometer, mechanical counter micrometer, toolroom micrometer Australia, precision micrometer 0.001mm, bore mic outside measurement, machinist micrometer used, Japanese micrometer, metrology tool Australia, shaft diameter measurement
