Mitutoyo 128-105 Mechanical Depth Micrometer 1 Inch

Product Description

The MITUTOYO 128-105 is a mechanical depth micrometer designed for precise depth measurement in machine shops, toolrooms, and field metrology work. It features a 1-inch measuring range with a rotating rod design and a ratchet stop thimble that delivers consistent measuring pressure for repeatable results. The satin chrome finish reduces glare under bright shop lighting and resists corrosion from typical shop environments. The measuring face is hardened steel for durability against repeated contact with workpieces. With an accuracy of 3 micrometers, this instrument meets the demands of machinists, tool-and-die technicians, and quality control inspectors who require reliable depth readings on slots, steps, recesses, and bores.

The 128-105 is suited for use in precision manufacturing, maintenance and repair operations, and quality inspection environments. The 63-inch base length provides stable contact across wide surfaces, reducing tipping error during measurement. It is appropriate for both flat and slightly irregular surfaces where a long base span improves accuracy. Typical applications include measuring pocket depths, counterbore depths, and step heights on machined components. This instrument ships as a single-rod unit covering a 0 to 1-inch depth range, making it appropriate for shallow precision depth work where setup simplicity is valued.

Key Features

• 1-inch measuring range with 0.0001-inch graduation for fine resolution depth work
• Ratchet stop thimble ensures consistent measuring pressure and repeatable readings
• Rotating rod design allows rod extension and engagement without removing the instrument from the workpiece
• Hardened steel measuring face resists wear during repeated contact with metal workpieces
• Satin chrome finish minimizes glare and provides corrosion resistance in shop environments
• 63-inch base length reduces tipping error on wide or flat surfaces

Compatibility

Designed as a standard mechanical depth micrometer for use in precision measurement applications requiring a 1-inch range single-rod configuration.

Installation Notes

Depth micrometers are handled and calibrated by machinists, metrologists, and quality technicians familiar with precision measurement instruments. Before use, clean the base and rod measuring faces with a lint-free cloth to remove debris that could affect accuracy. Zero the instrument on a flat reference surface or gauge block prior to taking measurements. Do not overtighten the thimble lock or apply side pressure to the rod, as this can introduce measurement error or damage the instrument.