Iscar 4513026 ER25 Clamping Collet Nut

Product Description

The ISCAR 4513026 is an ER25 clamping collet nut designed to secure ER25 series collets in compatible toolholders on CNC machining centers, lathes, and milling machines. The nut threads onto the toolholder nose and clamps the collet axially, maintaining consistent gripping force on cutting tools during operation. Weighing 0.5 pounds, it is a direct replacement component for worn or damaged clamping nuts in ER25 toolholding systems. Installation and replacement are handled by machinists and toolroom technicians as part of routine toolholder maintenance.

This clamping nut is suited for use in production machining environments where ER25 collet toolholders are in service. It is appropriate for both light-duty and general-purpose material removal applications across vertical and horizontal machining centers. The ER25 collet system is widely used in shops running milling, drilling, reaming, and tapping operations, making this a common service part for toolroom and floor-level maintenance.

Key Features

• Compatible with the ER25 collet series for broad toolholder fitment
• Functions as a direct clamping nut replacement in ER25 toolholding systems
• Compact and lightweight at 0.5 pounds for easy handling during tool changes
• Sold individually, allowing single-unit replacement without overstocking

Compatibility

Designed as a replacement clamping nut for ER25 series collet toolholders. Specific model compatibility should be verified against the toolholder manufacturer documentation prior to installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with ER25 toolholding systems. Before replacing the clamping nut, ensure the machine spindle is fully stopped and the toolholder is removed from the machine. Use the appropriate ER25 collet nut wrench and spanner to achieve proper seating — do not over-tighten by hand or with improvised tools, as this can damage the collet seat or thread engagement. Follow the toolholder manufacturer torque guidance where available.