Iscar 4513008 ER50 Clamping Collet Nut

Product Description

The ISCAR 4513008 is an ER50 clamping collet nut designed to secure ER50-series collets in compatible toolholders during machining operations. This component threads onto the toolholder nose and applies the clamping force needed to hold the collet and cutting tool in position. It is a direct replacement part used by machinists and toolroom technicians on CNC mills, lathes, and manual machines equipped with ER50 toolholding systems. The part weighs 0.5 pounds and does not include coolant-through capability.

This collet nut is suited for production and job-shop environments where ER50 toolholding is standard. It is typically installed when an existing nut shows wear on the bearing face or threads, or when building out additional ER50 toolholder assemblies. The ER50 collet series is among the largest in the ER standard range, commonly found on heavy-duty machining centers and boring applications that require larger-diameter workholding and cutting tool shanks.

Key Features

• Fits ER50 collet series toolholders
• Functions as a direct OEM-style replacement clamping nut
• No coolant-through passages — solid nut construction
• Lightweight at 0.5 pounds for easy handling during toolholder setup
• Sold individually — quantity of one per package

Compatibility

Designed as a replacement clamping nut for ER50 collet series toolholders. Specific model compatibility is not provided in available product data; verify thread specification and bearing face style against the existing toolholder before installation.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Before replacing the collet nut, ensure the machine spindle is fully stopped and the toolholder is removed from the machine. Use the correct ER50 collet nut spanner wrench to achieve proper seating torque — do not use pliers or improvised tools, as this can damage the bearing face and affect runout. Inspect collet and toolholder threads for wear or contamination before assembly.