Spi CMS220519021 Ball Anvil Micrometer 0-1 in

Product Description

The SPI CMS220519021 is an electronic ball anvil micrometer designed for precise outside measurement of curved, convex, and contoured surfaces. It features a spherical spindle and carbide ball anvil, both 6.5 mm in diameter, that make positive contact on rounded workpiece geometries where a flat anvil would give false readings. The measuring range runs from 0 to 1.00 inch with a resolution of 0.0001 inch, and a digital counter display provides fast, reliable readout. A ratchet thimble delivers consistent measuring pressure, and a positive lock nut holds the set position during transfer or recording. Calibration is included from the factory to ASME B89.1.13 standards. This tool weighs 0.85 pounds and packages at approximately 7 inches long, 3.4 inches wide, and 0.97 inches in height.

The CMS220519021 is suited for metrology, quality control, and precision inspection work in manufacturing, tooling, and machine shops. It is particularly useful when measuring the wall thickness of tubes, the radius of curved parts, or any application where standard flat-anvil micrometers cannot seat properly on the part surface. The electronic readout reduces transcription error during high-volume inspection runs. Licensed metrologists, machinists, and QC technicians are the primary users of this instrument.

Key Features

• Carbide ball anvil and spherical spindle, each 6.5 mm in diameter, for accurate contact on curved surfaces
• Electronic digital counter display with 0.0001 inch resolution
• Ratchet thimble ensures repeatable, consistent measuring force
• Positive lock nut secures the spindle position during transfer measurement
• Rotating spindle design for fine adjustment and seating
• Factory calibrated to ASME B89.1.13

Compatibility

Designed as an OEM-style precision measuring instrument for use in standard bench and in-process inspection applications requiring a 0 to 1.00 inch ball anvil micrometer with electronic readout.

Installation Notes

This instrument is handled and calibrated by metrologists or trained QC personnel. Store the micrometer in its case when not in use and keep it away from vibration, heat sources, and corrosive environments. Before use, verify the zero setting with the supplied standard and wipe the anvil and spindle faces clean with a lint-free cloth. Do not overtighten the lock nut, as this can damage the spindle thread and affect accuracy.