Spi CMS160809171 Mechanical Outside Micrometer 5 in

Product Description

The SPI CMS160809171 is a mechanical outside micrometer designed for precise linear measurement of external dimensions. It covers a measurement range up to 5 inches with a graduation of 0.0001 inches and an accuracy of 0.0002 inches, making it suitable for close-tolerance inspection work. The thimble uses a ratchet stop mechanism to apply consistent measuring pressure, and the spindle rotates for repeatable contact. Measuring faces are solid carbide for durability and wear resistance. A built-in digital counter aids in reading the measurement quickly. The unit ships calibrated and includes NIST traceability certification. Machinists, tool-and-die workers, and quality control technicians are the primary users.

This micrometer is used in precision machining, fabrication, and quality assurance environments where external diameter or thickness measurements must meet tight tolerances. It is appropriate for both shop-floor use and inspection bench setups. The included case protects the instrument during storage and transport. The NIST-traceable calibration certificate supports use in regulated manufacturing or calibration lab environments where documentation of measurement standards is required.

Key Features

• 5 inch maximum measurement range with 0.0001 inch graduation
• Accuracy of 0.0002 inches for close-tolerance inspection
• Ratchet stop thimble for consistent, repeatable measuring force
• Solid carbide measuring faces for extended wear life
• Digital counter for fast, easy reading alongside thimble scale
• Ships calibrated with NIST traceability certification and short-form certificate of calibration
• Hammertone and baked enamel coating for corrosion and impact resistance

Compatibility

Designed as a general-purpose outside micrometer for use wherever external linear measurements up to 5 inches are required in machining, fabrication, or quality inspection applications.

Installation Notes

Outside micrometers do not require installation but should be handled and stored by calibrated metrological practices. Before use, clean the measuring faces and verify the zero setting against a calibration standard or gauge block. Do not overtighten the thimble against a workpiece; use the ratchet stop to apply proper measuring force. Store the instrument in its protective case with the spindle slightly open to prevent face contact during storage.