Spi MS150825004 Mechanical Micrometer Head 0.5 in Flat Spindle

Product Description

The SPI MS150825004 is a mechanical micrometer head designed for precision measurement and positioning in industrial, laboratory, and instrumentation applications. It features a flat-face rotating spindle with a 0.5-inch measurement range, 0.51-inch thimble diameter, and a spindle diameter of 0.2 inches. The overall body length is 2.3 inches. Accuracy is rated to 0.0002 inches, making this head suitable for applications that demand tight measurement tolerances. The satin chrome finish resists corrosion and reduces glare during use. Each unit ships with a short-form certificate of calibration confirming traceable accuracy out of the box.

This micrometer head is used in machine tools, gauging fixtures, test equipment, electronics assembly, optical instruments, and precision machine instruments. Its compact form factor fits where standard measuring instruments cannot. The rotating spindle design allows the thimble to be set without translating the spindle axially, which is useful when zeroing the head in a fixed mount. Typical applications include fine feed adjustments on stages, depth stops, and precision actuator controls in both shop and laboratory environments.

Key Features

• Accuracy rated to 0.0002 inches for high-precision measurement and positioning tasks
• Flat-face rotating spindle design allows zeroing without axial spindle movement
• 0.51-inch thimble diameter provides a secure grip and easy thimble adjustment
• Satin chrome finish reduces glare and provides corrosion resistance
• Includes short-form certificate of calibration for traceable accuracy verification
• No digital counter — purely mechanical operation with no battery dependency

Compatibility

Designed as a mechanical micrometer head for integration into gauging fixtures, test equipment, optical instruments, electronics assemblies, and precision machine instruments requiring a 0.5-inch range flat-spindle head.

Installation Notes

Installation is typically performed by metrology technicians, machine builders, or instrumentation engineers familiar with precision positioning components. Secure all mounting surfaces before seating the micrometer head to avoid introducing measurement error through flex or misalignment. Avoid over-tightening clamp nuts or set screws against the barrel, as this can distort the bore and affect spindle travel. Verify zero calibration after mounting and before taking measurements.