Spi 14-137-4 Test Indicator Feeler Co-ax

Product Description

The SPI 14-137-4 is a replacement feeler accessory designed for use with Co-Ax indicators in precision measurement and machining applications. The feeler extends the reach and flexibility of a Co-Ax indicator during centering and bore-alignment operations on mills, lathes, and machining centers. Available in three overall lengths — 2 inches, 4 inches, and 6 inches — this part allows machinists and toolroom technicians to select the reach that suits the workholding setup. It is a direct drop-in accessory that restores or expands the functionality of an existing Co-Ax indicator without replacing the entire tool body.

This feeler is used in precision machining environments where a Co-Ax indicator is employed to locate bores, center workpieces, or verify concentricity. It is suited for use on vertical and horizontal machining centers, manual mills, and CNC setups where indicator reach must be matched to the depth or diameter of the feature being measured. Machinists, toolmakers, and quality technicians are the primary users of this accessory.

Key Features

• Compatible accessory feeler designed specifically for Co-Ax indicators
• Available in three overall lengths: 2 inches, 4 inches, and 6 inches
• Allows reach customization for varied bore depths and workholding configurations
• Sold individually as a single-unit replacement accessory
• Lightweight construction at 1 pound total package weight

Compatibility

Designed for use with Co-Ax indicators. Verify that the feeler tip interface matches your specific Co-Ax indicator model before installation.

Installation Notes

Installation is performed by machinists or toolroom technicians familiar with Co-Ax indicator operation. Before swapping the feeler, remove the indicator from the spindle and ensure the machine is powered down or in a safe, non-rotating state. Follow the indicator manufacturer's instructions for feeler attachment to avoid damaging the indicator body or the feeler seating interface. Do not overtighten the feeler retention mechanism.