Description
Product Overview
The Mitutoyo 193-103 is a 50–75mm range outside micrometer fitted with an integrated digit counter — the mechanical equivalent of a DRO on your bench. Designed for toolroom and production environments where reading a vernier sleeve under chips, coolant mist, or poor lighting is an invitation for misreads, the digit counter gives you a direct numerical readout with 0.01mm resolution before you even glance at the thimble. This is a genuine Japanese-made Mitutoyo instrument in used condition, presented in its original case with accessories — a solid, no-nonsense addition to any serious workshop’s measuring kit.
- Integrated mechanical digit counter (0.01mm resolution) — The counter drum eliminates the need to interpolate a thimble vernier, reducing reading errors in production runs or when measuring with one hand. At 0.01mm graduation, you’re reading to half a thou, which covers the vast majority of turned, milled, and ground work to drawing tolerance.
- 50–75mm measuring range — This is the third micrometer in a standard metric set, covering the range that catches out shops with only a 0–25 and 25–50 on the bench. Shaft journals, bored housings, bearing seats, and spigot fits in the 50–75mm window all land squarely in this instrument’s wheelhouse.
- Carbide-tipped anvil and spindle faces — Mitutoyo’s hardened and ground carbide measuring faces resist wear from repeated contact with ferrous workpieces, maintaining flatness and parallelism over the life of the instrument. On a used tool, this is the surface to inspect — and on this example, the faces present cleanly.
- Ratchet thimble / friction stop — The ratchet stop on the thimble ensures repeatable measuring pressure regardless of operator technique, which matters when you’re comparing multiple parts across a shift or handing the mic between operators.
- Ideal for: Checking turned shaft diameters between 50–75mm on a lathe, verifying bearing journal sizes before press fits, measuring ground bar stock to spec, qualifying bored housings, and production inspection of mid-range turned components where fast, unambiguous readings are needed.
Condition
(Used — Good Condition / Functional workshop tool, original case and accessories included)
Mechanically, this micrometer presents well. The spindle runs smoothly through its full travel with no perceptible slop, stick-slip, or roughness — the thread and barrel are in good working order. The digit counter advances and retracts cleanly. The carbide measuring faces appear flat and free from pitting, deep scratches, or galling — the surfaces that determine accuracy are in sound condition. The frame and thimble carry the expected patina of a used instrument: light handling marks, minor surface wear on the enamel, and general bench use evidence that any working micrometer accumulates over time. There are no cracks, bends, or damage to the frame, and the locknut functions correctly. As with any used precision instrument, verifying zero against a 50mm setting standard or calibrated setting rod before putting it into production is standard practice — the setting rod included with this tool provides a reference point for that check. The flaws here are cosmetic; the functional precision surfaces and mechanical operation are intact.
Included:
- 1 x Mitutoyo 193-103 Outside Digit Micrometer, 50–75mm, 0.01mm
- 1 x Setting standard / reference rod
- 1 x Original Mitutoyo fitted case
Not included: Calibration certificate (not included — verification against a setting standard recommended prior to first production use).
Brand Information
Mitutoyo Corporation, founded in Japan in 1934, is the world’s largest manufacturer of precision measuring instruments and occupies the top tier of the global metrology market alongside Mahr, Tesa, and Starrett. Their instruments are the de facto standard in Japanese, European, and Australian toolrooms — when a drawing calls out a measurement, a Mitutoyo is what most machinists reach for first. Japanese manufacturing provenance, consistent calibration traceability, and a global support and service network make Mitutoyo instruments a reliable long-term investment for any professional or serious home shop.
Specifications
| Feature | Specification |
|---|---|
| Brand | Mitutoyo |
| Model | 193-103 |
| Type | Outside Micrometer with Mechanical Digit Counter |
| Series | 193 (Digit Micrometer Series) |
| Measuring Range | 50–75mm |
| Graduation / Resolution | 0.01mm |
| Accuracy | ±0.004mm (per Mitutoyo specification for this series) |
| Readout Type | Mechanical digit counter + thimble scale |
| Measuring Faces | Carbide-tipped, hardened and ground |
| Frame Material | Cast iron frame with enamel finish, stainless steel barrel and thimble |
| Thimble Type | Ratchet stop (friction thimble for repeatable measuring pressure) |
| Country of Origin | Japan |
| Condition | Used — Good Condition |
| Included Items | Micrometer, setting standard rod, original fitted case |
| Not Included | Calibration certificate |
Keywords
Mitutoyo 193-103, Mitutoyo digit micrometer, Mitutoyo outside micrometer 50-75mm, outside micrometer 50-75mm, digit micrometer 0.01mm, mechanical counter micrometer, toolroom micrometer Australia, micrometer with counter drum, precision outside mic, bearing journal micrometer, machinist micrometer 75mm, metrology equipment Australia
