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Mitutoyo Radius Gauge Review: Precise radius measurement for workshop use

Mitutoyo 186-105 Radius Gauge
4.5
[Stamped Size Markings]  Radius sizes stamped on each gage for quick, accurate identification.
[Concave & Convex Pair]  Concave and convex gages pair together for comprehensive radius measurement.
[Secure Locking Clamp]  Included locking clamp keeps gages firmly secured and organized.
[Fast Radius Matching]  Easy pairing enables rapid, precise radius comparison and selection.
[Versatile Inspection Tool]  Ideal for profiling, verification, and various radius inspection tasks.
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Workshop measuring tool for checking curve radii, promising quick, repeatable readings with the Mitutoyo Radius Gauge. Clear handling and secure clamping reduce frustration for machinists and technicians. Is the gauge robust and accurate enough for routine shop inspections?

⚡ At a Glance
  • Handling: Compact set design for straightforward alignment and easy handling
  • Best for: Machinists, toolmakers and workshop technicians checking internal and external radii
  • Not ideal for: Users who require digital readouts or extremely fine fractional measurements

Paired concave and convex gages allow direct comparison against curved workpieces. A locking clamp secures the chosen gage during inspection.


Quick identification – Thanks to stamped radius sizes

Each gage has its radius size stamped onto the surface, so the correct member can be selected without need for additional measuring. Stamped markings remain readable under normal workshop use.

Immediate visual identification speeds up set-up and reduces the chance of selecting the wrong gage during checks.

Accurate matching – With paired concave and convex gages

Concave and convex members form complementary pairs that mirror internal and external radii, enabling direct, side-by-side comparison with the workpiece. Pairing removes the need to extrapolate curves from a single profile.

Direct matching simplifies verification of curved profiles and helps confirm whether components meet radius specifications.

Secure positioning – Thanks to a locking clamp

A locking clamp fixes the chosen gage in place to preserve the selected curve while transferring or inspecting parts. The clamp prevents movement that would alter the measured profile.

Locking ensures repeatable measurements and reduces errors during repeated inspections or when moving the gage between workstations.

✨ The 4 Key Reasons for Mitutoyo Radius Gauge
  1. Stamped Size Marks – Ensures immediate selection, cutting measurement setup time and errors
  2. Concave and Convex Pairing – Allow direct matching of internal and external radii quickly
  3. Locking Clamp – Keeps chosen gage secure for repeatable inspections and transfers
  4. Workshop-friendly Size – Fits into toolkits for portable bench-top checks and storage
📋 Technical Details at a Glance
  • Category: Radius gauge
  • Brand: Mitutoyo
  • Model: 186-105
  • Product ID: B001OBTG1I
  • Gauge types: Concave and convex paired gages
❓ Frequently Asked Questions

Q: Are the radius sizes easy to read?

A: Yes, each radius size is stamped on the gage for clear, immediate identification.

Q: Can concave and convex gages be used together?

A: Yes, both concave and convex radius gages become a pair for direct matching of internal and external radii.

Q: Is there a way to secure the chosen gage during inspection?

A: Yes, the set includes a locking clamp to hold the selected gage firmly in place.

🏆 Our Verdict

The Mitutoyo Radius Gauge suits machinists and technicians who perform routine radius checks in a workshop environment. Paired concave and convex gages with stamped sizes and a locking clamp make inspection faster and more reliable. Practical construction and straightforward operation deliver long-term workshop value.