Iscar 4500226 ER32 Collet 0.25 in 0.0004 in Tir

Product Description

The ISCAR 4500226 is an ER32 series collet designed for use in ER32-compatible toolholders and collet chucks on CNC machining centers, milling machines, and similar rotating spindle equipment. This collet accepts a 0.25 inch (1/4 inch) shank diameter and holds a maximum total indicator runout (TIR) of 0.0004 inches, supporting precise concentricity for drilling, reaming, and light milling operations. Machinists and tool-room technicians select ER collets as direct replacements or additional capacity for standard ER32 chuck systems. The 0.0004 inch TIR rating reflects the tight tolerances expected in production and toolroom environments.

This ER32 collet is suited for use in both manual and CNC machine tool setups where a 1/4 inch tool shank must be held with consistent runout control. Typical applications include production machining cells running drills, end mills, or reamers with 0.25 inch shanks. The ER32 collet system is a widely adopted standard across vertical machining centers, horizontal machining centers, and manual knee mills equipped with ER32 chucks. It is installed by machinists, tool-room technicians, and CNC setup personnel.

Key Features

• ER32 collet series for direct use in any ER32-standard chuck or toolholder
• 0.25 inch (1/4 inch) collet bore for standard shank tooling
• 0.0004 inch maximum TIR for tight concentricity in precision cutting applications
• Single-piece collet construction typical of the ER toolholding standard
• UNSPSC Code 27112800 for procurement and catalog classification

Compatibility

Designed as an OEM-style replacement or capacity addition for any ER32-standard collet chuck or toolholder accepting 0.25 inch shank tooling.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Before installing or removing an ER collet, ensure the machine spindle is fully stopped, de-energized, and locked out per facility lockout/tagout procedures. Seat the collet into the ER32 nut before inserting it into the chuck body, and torque the collet nut with a calibrated ER collet wrench to manufacturer-specified values for the chuck in use. Inspect the collet bore and seating surfaces for chips or damage before each use to maintain TIR performance.