Mitutoyo 148-501 Micrometer Head 0.5 in Zero-adjust

Product Description

The MITUTOYO 148-501 is a mechanical micrometer head with a 0.5 inch measuring range and a resolution of 0.0001 inch, designed for precise linear measurement in machine tool setups, jigs, fixtures, and positioning stages. The thimble is zero-adjustable, allowing the operator to set zero at any point in the range by loosening the set screw in the thimble body. The spindle is flat-faced and measures 0.1969 inches in diameter with a 13 mm length. The overall head length is 2.44 inches. The chrome-plated finish resists corrosion and provides a clean reference surface. Machinists, toolmakers, and metrology technicians install and use this head in precision mechanical assemblies.

The 148-501 is suited for integration into custom fixtures, optical stages, XY tables, and automated or semi-automated positioning equipment where repeatable linear actuation is needed. The flat spindle face contacts the workpiece or actuated surface without penetration, making it appropriate for soft materials or precision surfaces where a pointed spindle would be unsuitable. The stem diameter of 0.375 inches and 9.5 mm stem length allow mounting in standard micrometer head bores found in commercial and custom tooling fixtures.

Key Features

• Zero-adjustable thimble: set zero at any position by loosening the thimble set screw
• 0.0001 inch accuracy for high-precision positioning and measurement tasks
• Flat spindle face, 0.1969 inches in diameter, suitable for contact with flat or delicate surfaces
• Chrome-plated finish for corrosion resistance and surface durability
• 0.375 inch stem diameter fits standard micrometer head mounting bores
• Compact 2.44 inch overall length for integration into tight fixture envelopes

Compatibility

Designed as an OEM-style precision micrometer head for use in custom fixtures, machine tool applications, and positioning stages requiring a 0.375 inch stem mount and a 0.5 inch measuring range.

Installation Notes

Micrometer heads of this type are installed by machinists and toolmakers using standard boring and clamping methods appropriate to the fixture design. The stem should be clamped securely without over-torquing to avoid distorting the barrel or affecting accuracy. Ensure the spindle axis is properly aligned with the direction of travel before final clamping. Protect the measuring face from contamination and impact during installation.