Spi MS150825002 Mechanical Micrometer Head Flat Spindle

Product Description

The SPI MS150825002 is a mechanical micrometer head designed for precision measurement and positioning applications in machine tools, gauging fixtures, test equipment, and optical instruments. It features a 0.5-inch measurement range with a flat-face rotating spindle and delivers accuracy to 0.0002 inch, making it suitable for applications that demand fine, repeatable adjustment. The thimble diameter measures 0.51 inches and the overall body length is 2.3 inches. A clamp nut is included, and the unit ships with a short-form certificate of calibration. The satin chrome finish resists corrosion and reduces glare during inspection use. Calibration is confirmed at the factory before shipment.

This micrometer head is used in both light industrial and laboratory settings where a compact, non-digital measurement head is preferred over electronic alternatives. Typical applications include integration into machine slides, depth-gauging fixtures, test rigs, electronics assembly tooling, and optical instrument staging. The flat spindle face is suited for contact against flat workpiece surfaces without additional adapter tips. The non-rotating spindle body design keeps contact geometry consistent throughout the measurement stroke.

Key Features

• Accuracy to 0.0002 inch for precise positioning and measurement control
• Flat-face spindle suited for flat-surface contact applications
• 0.51-inch thimble diameter for secure grip and easy adjustment
• Satin chrome finish for corrosion resistance and low-glare surface
• Includes short-form certificate of calibration
• Clamp nut included for secure mounting in fixtures
• No digital counter — fully mechanical operation with no battery dependency

Compatibility

Designed as an OEM-style replacement or upgrade component for mechanical micrometer head applications in machine tools, gauging equipment, test fixtures, and optical and electronic instruments where a 0.5-inch range flat-spindle head is specified.

Installation Notes

Installation is typically performed by a metrology technician, machinist, or instrumentation technician. Ensure the mounting bore and clamp nut thread are compatible with your fixture before installation. Secure the head using the supplied clamp nut and verify zero calibration after mounting, as fixture clamping torque can shift the reference point. Do not exceed the rated measurement range of 0.5 inches, as overtravel can damage the spindle thread.