ER40 self-extracting collets according to DIN 6499 B standard are an advanced solution for tool clamping in CNC machine tools, designed to ensure high precision, repeatability, and operational safety. The self-extracting system enables fast tool release, reducing changeover time and improving production efficiency, making them ideal for high-performance machining environments.

Manufactured in compliance with DIN 6499 B, these collets guarantee full compatibility with ER tool holders and chucks, offering a wide clamping range from 3.0 to 30.0 mm. Made from high-alloy steel, hardened and precision-ground, they ensure excellent wear resistance, dimensional stability, and long-term performance even under demanding working conditions.

From a technical standpoint, ER40 collets provide high concentric clamping accuracy, significantly reducing form and geometric errors of the tool. This results in improved surface finish, reduced vibration, and minimized transmission play, which are critical factors for high-speed machining and tight tolerance applications.

The optimized slit geometry ensures uniform clamping force distribution along the entire tool diameter, enhancing grip and operational safety. When combined with suitable nuts, these collets can also be used with through-coolant systems, improving heat dissipation and chip evacuation during intensive machining operations.

ER40 collets are particularly suitable for applications in automotive, precision engineering, and advanced industrial manufacturing, where reliability, accuracy, and process consistency are essential. They represent a strategic choice to optimize machine tool performance and ensure stable, repeatable machining results.