Starrett 86409174 Mechanical Outside Micrometer 1 in

Product Description

The STARRETT 86409174 is a mechanical outside micrometer designed for precise linear measurement of external dimensions. It delivers a measurement range of 1 inch with a graduation of 0.0001 inches and an accuracy of 0.000050 inches, making it suitable for high-tolerance inspection work in machining, fabrication, and tool-and-die applications. The ratchet stop thimble provides consistent measuring pressure, reducing operator-to-operator variation. Measuring faces are solid carbide for long service life and wear resistance. The satin chrome finish reduces glare during use. A ring-style lock nut secures the spindle position when a reading needs to be held.

This micrometer is used in precision measurement tasks across manufacturing, maintenance, and quality control environments. It is appropriate for machinists, tool-and-die makers, maintenance technicians, and metrology professionals who require reliable hand-tool measurement. The flat anvil and solid carbide measuring face make it well suited for measuring round stock, flat stock, and machined part features. It ships with a lock nut and wrench included.

Key Features

• 1 inch measurement range with 0.0001 inch graduation for fine-resolution readings
• Accuracy of 0.000050 inches for high-tolerance inspection work
• Ratchet stop thimble ensures consistent measuring force across readings
• Solid carbide measuring faces resist wear and extend calibration intervals
• Ring-type lock nut holds spindle position while recording measurements
• Satin chrome finish minimizes glare in workshop and inspection lighting

Compatibility

Designed as a standard mechanical outside micrometer for general external measurement applications requiring a 1 inch range and 0.0001 inch resolution.

Installation Notes

Outside micrometers require no installation but should be calibrated against a known standard before first use and after any impact or drop. Store the tool with a small gap between the anvil and spindle to prevent thermal expansion damage. Cleaning the measuring faces before each use with a lint-free cloth helps maintain accuracy. Calibration and verification should follow the shop quality plan or applicable metrology standards.