Starrett 71985 Micrometer Rod 3 to 4 Inches

Product Description

The STARRETT 71985 is a micrometer rod accessory designed for use with 443 and 445 Series Micrometer Depth Gages. It extends the measurement range of compatible depth gages from 3 to 4 inches, allowing machinists and metrology technicians to reach deeper bores, slots, and stepped surfaces without swapping instruments. The rod measures 5/32 inches (approximately 4.06 mm) in diameter and weighs 0.0333 pounds. This type of rod accessory is a standard consumable in precision measurement setups where depth gage versatility across multiple ranges is required on the shop floor or in inspection departments.

This rod is suited for industrial and precision manufacturing environments where depth measurements in the 3 to 4 inch range are routine. Typical applications include quality control inspection, machining setup verification, and dimensional layout work. It is installed by trade-qualified machinists, tool and die makers, and metrology technicians working with STARRETT 443 and 445 Series Micrometer Depth Gages. The rod-style anvil design is appropriate for measuring slots, holes, and recessed features where flat-base depth gages cannot reach effectively.

Key Features

• Extends depth gage measurement range to 3 to 4 inches
• Rod-type anvil design for access to slots, bores, and recessed features
• Rod diameter of 5/32 inches for compatibility with 443 and 445 Series gages
• Maximum measurement capacity of 4.0000 decimal inches
• Lightweight at 0.0333 pounds for easy handling during inspection tasks

Compatibility

Designed for use with STARRETT 443 and 445 Series Micrometer Depth Gages, as specified by the manufacturer.

Installation Notes

Installation of this rod should be performed by a qualified machinist or metrology technician familiar with micrometer depth gage accessories. Power tools are not required. Ensure the depth gage is zeroed and calibrated after attaching the rod per the instrument manufacturer's procedure. Handle precision measuring accessories with care to avoid nicks or burrs on contact surfaces that could affect measurement accuracy.