Spi 10-727-6 Micrometer Extension Hole-mike Series

Product Description

The SPI 10-727-6 is a micrometer extension accessory designed for use with SPI Hole-Mike Series micrometers. It adds reach to the micrometer assembly, allowing technicians to measure bore depths and internal diameters that fall outside the standard range of the base instrument. The extension accommodates a maximum measurement of 6 inches and provides an extension range from 0.5 inches to 0.8 inches. Machinists, toolroom technicians, and precision measurement professionals install this accessory when working with deep bores or stepped features that require extended reach without sacrificing measurement accuracy.

This extension is suited for precision metrology applications in machine shops, manufacturing environments, and toolrooms. It is used whenever the base Hole-Mike micrometer cannot reach the target measurement depth or diameter on its own. The 10-727-6 is intended for bench-level and in-machine bore inspection work where repeatable, traceable measurements are required. It weighs 0.85 pounds and is sold individually.

Key Features

• Extends measurement range up to 6 inches maximum measurement depth
• Extension range of 0.5 inches minimum to 0.8 inches maximum
• Designed as a direct accessory for SPI Hole-Mike Series micrometers
• Compact and lightweight at 0.85 pounds for easy handling at the workstation
• Overall length of 6 inches for consistent reach in deep-bore applications

Compatibility

Designed for use with SPI Hole-Mike Series micrometers as a direct accessory extension.

Installation Notes

This extension is installed by a machinist or metrology technician at the workbench or measurement station. Before attaching or removing the extension, ensure the micrometer is clear of any workpiece and the measuring faces are protected from contact damage. Follow the micrometer manufacturer instructions for proper thread engagement and seating of the extension to maintain calibration integrity. Do not overtighten the extension joint, as this can affect measurement accuracy and damage the instrument threads.