Iscar 4503831 ER32 Collet 0.125 Inch

Product Description

The ISCAR 4503831 is an ER32 series collet designed for use in collet chuck toolholding systems on CNC machining centers, milling machines, and other rotating spindle equipment. It accepts a 0.125 inch (1/8 inch) shank diameter and holds a maximum total indicator runout (TIR) of 0.0004 inches, making it suitable for precision machining applications where concentricity and repeatability are critical. Weighing 0.5 pounds, this collet is a standard ER32 format component installed by machinists and tool room technicians in both production and job shop environments.

This collet fits any ER32-compatible collet chuck or toolholder, making it appropriate for a wide range of horizontal and vertical machining center setups. It is commonly used in milling, drilling, reaming, and tapping operations where a 0.125 inch shank tool must be held with minimal runout. Suitable for both light and moderate-duty cutting operations across metals, plastics, and composites.

Key Features

• ER32 collet series for broad compatibility with ER32-standard collet chucks
• 0.125 inch (1/8 inch) bore diameter for precise tool shank retention
• 0.0004 inch maximum TIR for high concentricity and repeatable tool positioning
• 0.5 pound weight for easy handling and straightforward chuck installation
• Single-piece packaging for individual replacement or tooling buildout

Compatibility

Designed as a standard ER32-format collet for use in any ER32-compatible collet chuck or toolholding system accepting a 0.125 inch shank diameter.

Installation Notes

Installation is performed by machinists or tool room technicians. The spindle or machine must be powered down and brought to a complete stop before changing collets. Ensure the collet chuck nut, collet groove, and chuck bore are clean and free of chips or debris before seating the collet. Use a properly sized collet wrench and chuck wrench to torque the nut — do not use improvised tools that can damage the collet or nut threads.