Starrett 234A-27 End Measuring Rod with Insulating Rubber Handle - 27

The Starrett 234A-27 is a 27-inch End Measuring Rod, also referred to as a micrometer standard, designed for checking and setting micrometers of 2" capacity and larger. It is equally at home on the machine tool floor for comparing gages, checking precision measuring instruments, measuring parallel surfaces, and a wide variety of other precision measurement tasks.

Constructed from special tool steel in rod form, both ends are hardened and accurately lapped to a spherical radius, ensuring consistent, repeatable contact and reliable reference measurements. The insulating rubber handle provides a secure, comfortable grip while minimizing thermal expansion caused by hand heat — a critical feature when working to tight tolerances over a 27-inch span.

Key Features:

• 27-inch measurement length for use with large-capacity micrometers
• Made from special tool steel with hardened, spherically lapped ends
• Insulating rubber handle reduces thermal expansion from hand contact
• Suitable for comparing gages, setting micrometers, and measuring parallel surfaces
• Same standard type supplied with Starrett micrometers from the factory
• Precision ground for consistent, accurate reference measurements
• American-made by L.S. Starrett, a trusted name in precision tools since 1880

The Starrett 234A-27 is the go-to micrometer setting standard for machinists, toolmakers, and quality control professionals who demand accuracy in large-range measurement applications.