Mitutoyo 148-502 Mechanical Micrometer Head 0.5 in

Product Description

The MITUTOYO 148-502 is a mechanical micrometer head designed for precise linear measurement and positioning in machine tool, fixture, and instrumentation applications. It provides a 0.5-inch measurement range with an accuracy of 0.0001 inch, making it suitable for high-precision setups. The head features a zero-adjustable thimble that allows technicians to set zero at any position by loosening the set screw in the thimble, eliminating the need to reset a reference datum. The rotating flat spindle measures 0.1969 inches in diameter and 13 mm in length, finished in chrome for durability. At 2.8 inches in overall length and weighing 0.5 pounds, it integrates cleanly into bench fixtures and precision assemblies.

This micrometer head is used in precision machining, metrology lab setups, fixture building, and mechanical positioning applications where repeatable, fine-increment adjustment is required. It is suited for integration into custom jigs, measuring fixtures, and machine slide assemblies in both production and toolroom environments. The SKS3 hardened steel measuring face provides wear resistance under repeated contact. A clamp nut is supplied, and the unit ships in a paper case. It is installed by machinists, metrologists, and precision instrument technicians.

Key Features

• Zero-adjustable thimble: set zero at any position by loosening the set screw in the thimble
• Accuracy to 0.0001 inch with 0.01-inch graduation
• Rotating flat spindle, 0.1969 inches in diameter and 13 mm in length
• SKS3 hardened steel measuring face for wear resistance
• Chrome finish on spindle and body
• Clamp nut included; stem diameter 0.375 inches, stem length 9.5 mm
• No digital counter — purely mechanical operation

Compatibility

Designed as an OEM-style replacement or upgrade micrometer head for precision fixtures, machine tool slides, and instrumentation assemblies requiring a 0.5-inch range mechanical head with a 0.375-inch diameter stem mounting.

Installation Notes

Installation is typically performed by machinists or precision instrument technicians. Before installing or removing the head from a fixture, ensure the machine or assembly is powered down and all motion is arrested. Mount the stem securely using the supplied clamp nut to the specified bore; do not overtighten the clamp nut, as this may distort the stem and affect spindle alignment. Verify zero setting after mounting by loosening the set screw in the thimble and rotating to the desired datum before re-tightening.