Starrett 71980 Micrometer Depth Gage Rod 7 to 8 in

Product Description

The STARRETT 71980 is a micrometer rod accessory designed for use with 440 Series Micrometer Depth Gages. It extends the measurement range of the depth gage from 7 to 8 inches, allowing technicians and machinists to take accurate depth readings at greater reach. The rod measures 1/8 inch (3.20 mm) in diameter and 8.0 inches in overall length. It is a direct replacement or supplemental rod for shops and field technicians who need full range coverage across their 440 Series instrument setup. Weighing just 0.1 pounds, the rod is a lightweight, precision-machined component built to fit without modification.

This rod is suited for use in manufacturing, machine shops, tool rooms, and quality-control environments where precise depth measurement is required. It is typically installed by machinists, metrologists, or skilled tradespeople maintaining calibrated measurement toolsets. The 71980 covers the 7-to-8-inch depth range, making it the appropriate extension rod when measurements exceed the base instrument capacity of the 440 Series setup.

Key Features

• Extends 440 Series Micrometer Depth Gage measurement range to 7-8 inches
• Rod diameter of 1/8 inch (3.20 mm) for precise fitment
• Overall length of 8.0 inches
• Lightweight at 0.1 pounds for easy handling and storage
• Sold individually, quantity of one per package

Compatibility

Designed for use with STARRETT 440 Series Micrometer Depth Gages. Covers the 7 to 8 inch measurement range within that series.

Installation Notes

Installation of this rod should be performed by a qualified machinist or metrologist familiar with micrometer depth gage assemblies. Ensure the depth gage is zeroed and the measurement surface is clean before inserting the rod. Handle the rod carefully to avoid damage to the precision-ground surfaces, as nicks or burrs will affect measurement accuracy. Follow the instrument manufacturer guidelines for rod installation and removal to preserve calibration integrity.