Starrett 71978 Micrometer Depth Gage Rod 5 to 6 in

Product Description

The STARRETT 71978 is a replacement micrometer rod designed for use with the 440 Series Micrometer Depth Gages. The rod extends the measuring range of compatible depth gages to cover the 5 to 6 inch measurement range. It features a rod diameter of 1/8 inch (3.20 mm) and an overall length of 6.0 inches. Machinists, tool-and-die technicians, and precision measurement professionals install this rod when expanding or replacing components in a 440 Series depth gage setup. The rod-style anvil design is suited to accurate depth measurement in bores, slots, and stepped surfaces.

This rod is intended for precision depth measurement applications in machine shops, manufacturing facilities, and inspection environments. It is compatible with the 440 Series Micrometer Depth Gages and is used when the measuring range must be extended to the 5 to 6 inch interval. The part ships individually and is sold as a single unit replacement rod, making it practical for maintaining existing gage sets without replacing the full instrument.

Key Features

• Extends 440 Series Micrometer Depth Gage range to 5 to 6 inches
• Rod diameter of 1/8 inch (3.20 mm) for precise fit in compatible gage bodies
• Overall length of 6.0 inches
• Rod-style anvil type for accurate depth measurement in bores and slots
• Sold as a single replacement unit for field or shop maintenance

Compatibility

Designed for use with STARRETT 440 Series Micrometer Depth Gages, covering the 5 to 6 inch measurement range.

Installation Notes

Installation should be performed by a qualified machinist or metrology technician familiar with micrometer depth gage components. Before swapping rods, ensure the gage is off any measuring surface and the thimble is backed off to avoid contact damage. Handle the rod by its body to avoid contaminating the measuring surfaces with oils that can affect accuracy. Verify the rod seats fully and squarely in the gage base before taking measurements.