Mitutoyo 129-111 Mechanical Depth Micrometer 100mm 4 Rod

Product Description

The MITUTOYO 129-111 is a mechanical depth micrometer designed for precise depth measurement in machining, tooling, and inspection applications. It covers a measurement range of 100 mm using a set of 4 rotating rods, each with a 4 mm diameter, allowing the technician to step through depth intervals without changing tools. The ratchet stop thimble delivers consistent measuring force on every reading, reducing operator-to-operator variation. Measuring faces are hardened steel for durability under repeated shop use. The satin chrome finish reduces glare under work lighting and resists corrosion. Accuracy is rated at 3 micrometers. This instrument is used by machinists, quality control inspectors, and tool and die professionals.

The 129-111 suits depth measurement tasks on bores, slots, steps, and counterbores in both job-shop and production-floor environments. The 63.5 mm base length provides stable seating across wider workpiece openings. The rotating rod design allows quick rod selection for the required depth range. Metric graduation is 0.01 mm; inch graduation is 0.001 inch. The instrument is appropriate for precision inspection work in manufacturing, tool rooms, and metrology labs. It ships in a fitted plastic case for storage and transport.

Key Features

• 100 mm total measurement range via 4 interchangeable rotating rods
• Ratchet stop thimble ensures constant, repeatable measuring force
• Hardened steel measuring faces for long service life in shop environments
• 63.5 mm base length for stable contact on wider workpiece surfaces
• Metric graduation of 0.01 mm and inch graduation of 0.001 inch on the same instrument
• Measuring rod lock for secure depth reading during inspection
• Satin chrome finish reduces glare and provides corrosion resistance

Compatibility

Designed as a standard OEM-style mechanical depth micrometer for general-purpose precision measurement in machining and inspection applications.

Installation Notes

Depth micrometers are calibrated precision instruments and should be handled by qualified machinists or metrology technicians. Before use, verify the zero setting with the rods fully retracted and the base seated on a flat reference surface. Protect the instrument from impacts, chips, and coolant exposure. Store in the fitted case when not in use to maintain calibration and protect the measuring faces.