The ER25 RF rubber sealed collets are designed for machining applications requiring internal coolant supply through the cutting tool, ensuring reliable sealing of the coolant flow during high-speed rotation.

Manufactured according to DIN ISO 15488 (DIN 6499) standards, these collets belong to the ERC RF series (Rubber Sealed Collets) and are specifically engineered to maintain coolant sealing thanks to neoprene sealing inserts integrated into the 30° taper of the collet.

This sealing system prevents coolant leakage and allows the coolant to pass directly through the internal lubrication channels of the cutting tool, effectively cooling the cutting edges and improving chip evacuation.

The collet body is designed with a 4+4 segment clamping structure, which increases structural rigidity and improves clamping stability. The average runout accuracy ≤ 0.008 mm ensures excellent rotational precision, minimizing vibrations during high-precision machining operations.

The reduced clamping range of 0.1 mm provides highly accurate tool holding, which is essential in milling, drilling, and boring operations where dimensional stability and precision are critical.

These collets are suitable for coolant pressures up to 25 bar, making them ideal for demanding machining environments such as CNC machining centers and high-performance milling machines.

For proper coolant sealing, tools must have a cylindrical shank matching the nominal collet diameter and must be inserted along the entire clamping length. When using Weldon shank tools, the flat must be positioned below the sealing insert to prevent coolant leakage.

ER25 RF sealed collets are widely used in automotive manufacturing, precision engineering, mold production, aerospace machining, and high-productivity CNC operations, where efficient coolant delivery and stable tool clamping significantly improve machining performance.

Thanks to their robust design and ER standard precision, these collets enhance tool cooling, chip evacuation, machining accuracy, and tool life.