Starrett 71974 Micrometer Rod 1 to 2 Inches

Product Description

The STARRETT 71974 is a micrometer rod accessory designed for use with 440 Series Micrometer Depth Gages. It extends the measurement range of the depth gage from 1 to 2 inches, allowing technicians and machinists to accurately measure deeper features without switching instruments. The rod measures 2.0 inches in overall length and has a diameter of 1/8 inch (3.20 mm). At 0.1 pounds, it is a lightweight, precision-ground component that integrates directly with the host gage. Metrologists, quality control technicians, and toolroom professionals typically keep a set of these rods on hand to cover a range of depth measurement requirements.

This rod is suited for dimensional inspection tasks in manufacturing, toolroom, and quality assurance environments. It is used wherever a 440 Series Micrometer Depth Gage is already in service and a measurement range of 1 to 2 inches is required. Typical applications include measuring slot depths, hole depths, shoulder distances, and step heights on machined components. The rod-type anvil design is appropriate for measuring into narrow or confined features where flat-base depth gages cannot reach.

Key Features

• Extends 440 Series Micrometer Depth Gage range to 2.0 inches maximum measurement
• Rod-type anvil configuration for access to narrow slots and confined features
• 1/8 inch (3.20 mm) rod diameter for precise fitment into tight openings
• Lightweight at 0.1 pounds for easy handling during inspection tasks
• Sold individually, compatible with existing 440 Series depth gage setups

Compatibility

Designed for use with STARRETT 440 Series Micrometer Depth Gages. Covers a measurement range of 1 to 2 inches when paired with the appropriate base unit.

Installation Notes

Installation of this rod is performed by a machinist or metrology technician as part of gage setup. Before installing or removing the rod, ensure the depth gage is set to zero and the measuring spindle is fully retracted to avoid damage to the rod or gage. Follow the gage manufacturer instructions for rod seating and locking to ensure measurement accuracy. Handle with clean hands or lint-free gloves to prevent corrosion on the precision ground surfaces.