The ER40 HP high-precision collets according to DIN ISO 15488 (DIN 6499) are designed to ensure extremely stable and concentric clamping of cutting tools used in CNC machine tool applications. This collet series represents a high-performance solution for milling, drilling and precision machining operations where clamping stability and run-out accuracy are essential to achieve high machining quality.

The collet design features a 12-slot cutting geometry, developed to optimize the distribution of clamping forces and guarantee excellent concentricity during operation. This construction allows the system to reach a run-out accuracy of up to 0.005 mm, making these collets particularly suitable for high-speed machining and applications where dimensional precision and surface finish are critical.

The declared precision is guaranteed only when the collet clamps a tool with the nominal diameter, ensuring optimal pressure distribution along the entire contact surface of the tool shank. This characteristic significantly reduces micro-vibrations, improves machining stability and increases the lifetime of both the cutting tool and the clamping system.

The surface finish of the collet is manufactured with Rz 1.6 roughness, providing a highly uniform and accurate contact surface that enhances clamping reliability and reduces the risk of micro-movement or deformation during machining operations.

ER40 HP collets provide a clamping range from Ø3 mm to Ø26 mm with 1 mm increments, offering high flexibility when configuring tool setups in CNC machining centers and milling machines. This wide dimensional range makes the ER system one of the most widely used standards in precision machining environments.

Due to their high accuracy and manufacturing quality, ER40 HP collets are widely used in automotive manufacturing, aerospace engineering, mold production, precision mechanical workshops and high-volume industrial machining, where tool run-out accuracy and stable clamping conditions directly influence machining performance and final component quality.

These collets therefore represent a reliable solution for CNC technicians, production engineers and machine tool operators who require a precise, durable and internationally standardized clamping system.