Description
Product Overview
When you’re measuring the wall thickness of a thin-walled tube, checking the depth of a groove, or verifying the thickness of a disc or flange where a standard anvil micrometer simply can’t get purchase, you need a disc micrometer. The flat, large-diameter disc anvils span bridging features and unsupported surfaces that would rock or slip under a conventional spherical or flat anvil — giving you a repeatable, grounded reading where other mics give you guesswork. The Mitutoyo 169-201 is a 0–25 mm disc micrometer with 0.01 mm graduation, built to Mitutoyo’s JIS-grade toolroom standard, and this unit presents in like-new condition with no visible wear to the measuring faces or thimble graduations.
- Large-diameter disc anvils (16 mm diameter, hardened and ground) — The disc geometry distributes clamping load across a broader contact area, critical when measuring thin sheet, non-ferrous strip, or brake disc thickness where a conventional anvil would tip or indent soft material and give a false low reading.
- 0.01 mm graduation on a clearly engraved thimble and sleeve — The 25-division thimble scale on the 169-201 gives direct readings to one-hundredth of a millimetre. For experienced hands, interpolation to 0.001 mm is practical in a temperature-stable environment, though the stated resolution is 0.01 mm.
- Ratchet-stop thimble — The friction-controlled ratchet stop standardises measuring force regardless of operator, reducing the variable most responsible for inconsistent readings when multiple people are working from the same bench setup. This is the feature that separates a toolroom mic from a hardware-store instrument.
- Mitutoyo 169-series disc micrometer platform — The 169-201 is the 0–25 mm range variant of Mitutoyo’s dedicated disc micrometer series. No adapters, no third-party disc retrofits — the disc anvil geometry is engineered into the frame from the ground up, keeping parallelism between anvil faces within Mitutoyo’s published tolerance.
- Ideal for — Measuring wall thickness of thin-walled tube and pipe, checking brake rotor and clutch disc thickness, verifying sheet metal and gasket material thickness, inspecting disc spring and shim stock, measuring spur gear tooth thickness at the pitch line, and any application where a standard flat or spherical anvil cannot achieve stable contact.
Condition
Used (Like New / Minimal Use, No Visible Wear)
This Mitutoyo 169-201 presents exceptionally well. The disc anvil faces show no visible scoring, pitting, or flat spots — both faces appear clean and bright under inspection, with no corrosion or contact-induced wear marks. The thimble sleeve graduations are crisp and fully legible with no rubbing or paint fill loss. The knurled thimble and lock nut operate smoothly, with no stiction or roughness in the spindle travel across the full 0–25 mm range. The ratchet stop engages cleanly and consistently. The frame retains its original finish with no significant dings, deep scratches, or corrosion — what’s present is nothing more than the expected light handling patina of a tool that has seen careful use. The measuring faces are parallel and the spindle advances and retracts without detectable slop. As with any used precision instrument, verification against a certified gauge block or setting standard before putting it into production use is recommended practice — zero the instrument with the disc faces together and confirm mid-range with a 12.5 mm gauge block or equivalent ground reference to satisfy yourself of accuracy before committing to critical work.
Included:
- 1 x Mitutoyo 169-201 Disc Micrometer, 0–25 mm, 0.01 mm graduation
- 1 x Wooden storage case with foam insert (as shown)
- 1 x Setting standard / gauge (as shown in case)
Not included: Calibration certificate. If traceable calibration is required for your QA system, budget for a third-party NATA calibration service after purchase.
Brand Information
Mitutoyo Corporation, founded in Japan in 1934, is the world’s largest manufacturer of precision measuring instruments and consistently sits at the top tier of global metrology alongside Mahr, Starrett, and Tesa. Their instruments are manufactured to JIS B 7502 and equivalent international standards, and Mitutoyo gauges are found on the inspection benches of aerospace, automotive, and precision engineering facilities worldwide — including throughout Australia’s manufacturing and defence supply chains. For a machinist or toolmaker, a Mitutoyo instrument is a known quantity: the specification on the data sheet is what you get in the field, backed by decades of documented performance and a comprehensive Australian service and calibration network.
Specifications
| Feature | Specification |
|---|---|
| Brand | Mitutoyo |
| Model | 169-201 |
| Type | Disc Micrometer (Outside) |
| Series | 169 — Disc Micrometer Series |
| Measuring Range | 0–25 mm |
| Graduation / Resolution | 0.01 mm |
| Accuracy | ±0.003 mm (per Mitutoyo published specification for 169-series) |
| Disc Anvil Diameter | 16 mm (hardened and ground) |
| Disc Anvil Thickness | 1.5 mm |
| Thimble Type | Ratchet stop |
| Frame Material | Cast steel with heat-insulating side plates |
| Spindle / Anvil Material | Hardened alloy steel, carbide-tipped faces |
| Country of Origin | Japan |
| Condition | Used — Like New |
| Included Items | Micrometer, wooden storage case with foam insert, setting standard |
| Not Included | Calibration certificate |
Note: Specifications sourced from Mitutoyo published data for the 169-series. Buyers should verify current Mitutoyo documentation for the 169-201 variant if calibration traceability or formal inspection records are required.
Keywords
Mitutoyo 169-201, Mitutoyo disc micrometer, disc micrometer 0-25mm, outside disc micrometer, thin wall thickness measurement, sheet metal micrometer, brake disc micrometer, toolroom micrometer Australia, precision outside micrometer, Mitutoyo micrometer used, disc anvil micrometer, micrometer 0.01mm graduation
