Techniks 04232-21 ER32 Collet 21 Mm

Product Description

The TECHNIKS 04232-21 is an ER32 series collet with a 21 mm bore size, designed for use in CNC machining centers, milling machines, lathes, and other rotating spindle equipment. It provides a secure, concentric grip on cutting tools and workpieces, delivering a Total Indicator Runout (TIR) of 0.0002 inches for precision tool holding. Licensed machinists, CNC operators, and toolroom technicians install this collet as part of an ER32 collet chuck system where repeatable accuracy and reliable clamping force are required.

The 04232-21 is suited for production machining and toolroom environments that rely on the widely adopted ER32 collet standard. It accepts 21 mm shank tooling and fits any ER32-compatible collet chuck. The ER32 series is common in both manual and CNC spindle applications across job shops and manufacturing facilities.

Key Features

• ER32 collet series - fits any ER32-compatible collet chuck
• 21 mm bore accommodates 21 mm shank cutting tools and workpieces
• TIR of 0.0002 inches for high-precision, concentric tool holding
• Lightweight at 0.5 pounds for easy handling and quick changeout
• Standard ER collet geometry supports fast tool changes without chuck removal

Compatibility

Designed as an OEM-style replacement and standard fitment for ER32 collet chuck systems requiring a 21 mm bore collet.

Installation Notes

Installation is performed by machinists or CNC toolroom technicians. Before installing or removing a collet, ensure the machine spindle is fully stopped and the control is in an e-stop or locked-out state per your facility lockout/tagout procedure. Insert the collet into the ER32 collet nut before threading the nut onto the chuck body - never tighten the nut with the collet seated directly in the chuck without the nut engaged. Use a calibrated collet wrench and torque to the chuck manufacturer's specification found in the chuck documentation.