Mitutoyo 983528 Depth Micrometer Rod 7 to 8 in

Product Description

The MITUTOYO 983528 is a depth micrometer extension rod designed for use with Mitutoyo 137 and 329 series depth micrometers. It extends the measuring range of compatible depth mic sets to cover depths from 7 to 8 inches. The rod measures 282.10 millimeters in overall length with a 4.00 millimeter rod diameter, providing precise, consistent contact geometry for accurate depth readings. This accessory is installed by metrologists, machinists, and tool-room technicians who need to expand the range of an existing depth micrometer without purchasing a complete new instrument.

This rod is suited for precision measurement applications in manufacturing, machining, and inspection environments. It is used wherever bore depth, slot depth, or step measurements exceed the base range of a standard depth micrometer set. Typical installations occur on production floors and in quality control labs where Mitutoyo 137 and 329 depth micrometers are already in service. The rod drops into the existing micrometer spindle and locks in place using the standard clamping mechanism of the host instrument.

Key Features

• Extends depth micrometer measuring range to 7 to 8 inches maximum depth
• 4.00 millimeter rod diameter for precise contact and consistent measurement geometry
• Overall length of 282.10 millimeters to reach deep bores and stepped features
• Designed as a direct accessory for Mitutoyo 137 and 329 series depth micrometers
• Sold individually — no additional rods or sets included

Compatibility

Designed for use with Mitutoyo 137 and 329 series depth micrometers as a direct replacement or range-extension rod accessory.

Installation Notes

Installation is performed by the instrument operator or a calibration technician. Before changing rods, ensure the micrometer is set to zero and the spindle lock is released. Insert the rod fully into the spindle bore and secure it using the clamping screw on the host instrument per the micrometer manufacturer's instructions. Verify calibration with a reference standard after swapping rods to confirm measurement accuracy.