Starrett 72279 Micrometer Ratchet Stop for Starrett 436

Product Description

The STARRETT 72279 is a ratchet stop accessory designed for use with Starrett 436 micrometers. A ratchet stop provides consistent, repeatable measuring pressure by limiting the force applied to the thimble during measurement, reducing the risk of over-tightening and improving reading accuracy. This component is a direct replacement or spare part intended for machinists, quality control technicians, and precision measurement professionals who rely on Starrett 436 series micrometers in shop or inspection environments. The part ships individually and is sold as a single unit.

This ratchet stop is suited for bench-top inspection stations, machine shop floors, and tool crib applications where maintaining measurement consistency across multiple operators is critical. It fits directly into the Starrett 436 micrometer assembly, restoring proper torque-limiting function when the original ratchet stop is worn or damaged. No calibration is included and no traceability certification is provided with this part.

Key Features

• Designed specifically for Starrett 436 series micrometers
• Ratchet stop mechanism provides repeatable measuring pressure
• Reduces operator-induced measurement error from over-tightening
• Sold as a single replacement unit
• No calibration or traceability certification included

Compatibility

Designed for use with the Starrett 436 micrometer series as a direct accessory replacement.

Installation Notes

Installation should be performed by a qualified machinist or metrologist familiar with micrometer disassembly and reassembly. Ensure the micrometer is removed from service before replacing the ratchet stop. Follow the micrometer manufacturer's service documentation for proper component seating and reassembly sequence. After installation, verify measurement repeatability with a known standard before returning the tool to service.