Spi CMS160809170 Outside Micrometer 4 Inch Range

Product Description

The SPI CMS160809170 is a mechanical outside micrometer designed for precise linear measurement in machining, fabrication, and metrology applications. It covers a measurement range of 4 inches with a graduation of 0.0001 inches and an accuracy of 0.0002 inches, making it suitable for close-tolerance work. The thimble uses a ratchet stop mechanism to apply consistent measuring force, and the spindle rotates smoothly for controlled engagement. A digital counter aids reading, and the measuring faces are solid carbide for durability and wear resistance. This instrument is calibrated and ships with NIST traceability certification. Licensed machinists, tool and die makers, quality control technicians, and precision tradespeople are the typical users.

The SPI CMS160809170 is used wherever outside dimensions of workpieces must be verified to four decimal places. Typical applications include verifying shaft diameters, stock thickness, and turned part dimensions in machine shops, manufacturing facilities, and inspection departments. The included case and certificate of calibration make it ready for immediate use in controlled environments or on the shop floor.

Key Features

• 4 inch measurement range with 0.0001 inch graduation for high-resolution readings
• Ratchet stop thimble ensures consistent, repeatable measuring force
• Solid carbide measuring faces resist wear under frequent use
• Digital counter assists in reading the measurement scale quickly and accurately
• NIST traceability certification and short-form calibration certificate included
• Enamel coating on frame for corrosion resistance and durability

Compatibility

Designed as a standard outside micrometer for general-purpose precision measurement tasks where a 4 inch range instrument is required.

Installation Notes

Outside micrometers require no installation but should be handled and stored with care to protect calibration. Before use, verify the zero setting against the supplied standard or a known gauge block. Store the instrument in the included case when not in use and avoid exposing it to temperature extremes that could affect measurement accuracy. Calibration should be verified periodically per your facility quality plan or applicable metrology standards.