The ER50 RF rubber sealed collets are designed for high-precision clamping of cylindrical tools in CNC machining centers, milling machines and high-performance machine tools. Manufactured according to DIN ISO 15488 (DIN 6499) standards, these collets ensure reliable clamping, excellent concentricity and effective coolant management during machining operations.

The collet structure features a 4+4 slot configuration, which allows a uniform distribution of clamping forces along the entire tool shank surface. This design increases rigidity and contributes to maintaining an average runout accuracy of 0.008 mm, ensuring stable and repeatable machining results even in demanding production environments.

The distinctive feature of the RF (Rubber Sealed) version is the presence of neoprene sealing inserts positioned inside the 30° cone of the collet. These seals prevent coolant leakage and enable efficient use of through-tool coolant systems. The coolant flows through the lubrication channels of the tool and exits directly from the cutting edges, improving cooling performance and facilitating chip evacuation.

This system is particularly advantageous in operations such as deep drilling, high-speed milling and heavy machining, where proper coolant delivery is essential for tool life, thermal stability and machining quality.

The ER50 RF collet provides a clamping range from 10 mm to 34 mm, with a collapse capacity of 0.1 mm, ensuring accurate tool clamping when the tool shank diameter corresponds to the nominal collet size. The system supports a maximum coolant pressure of 25 bar, allowing efficient lubrication and cooling even in intensive machining processes.

For proper operation, the tool must be inserted along the entire gripping length of the collet to ensure effective sealing. When using tools with Weldon flats, correct orientation is required so that the flat does not interfere with the neoprene seals and compromise coolant containment.

Thanks to the combination of high clamping precision, structural rigidity and efficient coolant sealing, ER50 RF collets are widely used in industrial applications such as automotive manufacturing, aerospace machining, precision mechanical production and high-performance CNC machining environments.