Mitutoyo 123-101 Disc Micrometer 0-25mm 0.01mm Graduation

Product Description

The MITUTOYO 123-101 is a mechanical disc micrometer designed for precise outside measurement of grooves, keyways, and narrow recessed features that standard anvil micrometers cannot reach. It covers a measurement range of 0 to 25mm with a graduation of 0.01mm and delivers an accuracy of 4 micrometers. The 20mm disc anvil and 6.35mm spindle allow the tool to seat flush against recessed surfaces for repeatable readings. A ratchet stop thimble controls measuring force to promote consistent results across measurements. The satin chrome finish resists corrosion and reduces glare during use. This instrument is suited for machinists, tool-and-die professionals, and precision metrology technicians working in production or inspection environments.

The MITUTOYO 123-101 is used in applications where a conventional flat anvil cannot access a narrow groove, undercut, or disc-brake-type surface. Typical install and use scenarios include inspection of disc brake rotors, spline grooves, snap-ring channels, and similar recessed geometry on machined components. It is equally applicable on the shop floor and in quality-control inspection stations. The ratchet stop thimble makes it practical for repetitive measurement tasks where operator-to-operator force variation would otherwise introduce error.

Key Features

• 0 to 25mm measuring range with 0.01mm graduation for fine resolution
• 4 micrometer accuracy supports high-precision inspection work
• 20mm disc anvil diameter with 0.70mm edge thickness accesses narrow grooves and recessed features
• 6.35mm spindle diameter provides clearance in confined measurement areas
• Ratchet stop thimble standardizes measuring force for repeatable readings
• Satin chrome finish reduces glare and resists surface corrosion
• TUV Certified to recognized metrology standards

Compatibility

Designed as an OEM-style mechanical disc micrometer for precision measurement of grooves, recessed surfaces, and narrow-profile features in the 0 to 25mm range.

Installation Notes

Handle and store precision micrometers away from heat sources, magnetic fields, and direct sunlight to preserve calibration. Before use, verify the zero setting against the reference standard supplied with the instrument and adjust if necessary. Clean the anvil and spindle contact faces with a lint-free cloth before each measurement session. Periodic recalibration by a qualified metrologist is recommended to maintain traceable accuracy.