The ER20 sealed collets with neoprene inserts and external coolant holes (JET system) are designed to ensure precise tool clamping and efficient coolant management during high-speed machining operations on CNC machine tools. Manufactured according to the DIN ISO 15488 (DIN 6499) standard, these collets represent an advanced technical solution for milling, drilling and precision machining where tool stability and proper chip evacuation are essential for maintaining high production quality.

The integrated neoprene sealing rings positioned in the 30° collet cone ensure reliable coolant sealing, preventing leakage and directing the coolant flow precisely toward the cutting area. The JET system with four frontal coolant holes allows the coolant to be delivered directly onto the cutting tool and machining zone, improving cooling performance, facilitating chip evacuation and increasing tool life.

These ER collets feature a 4+4 slot design, a structural configuration that enhances rigidity and ensures extremely precise clamping performance. The average runout accuracy is ≤ 0.008 mm, making these collets suitable for high-precision machining operations and high-speed machining environments.

The clamping range of 0.1 mm allows accurate tool diameter adjustment, while the ER20 series typically covers tool diameters from 3 mm up to 10 mm. The integrated coolant system is designed to operate with pressures up to 25 bar, making these collets particularly suitable for machining processes requiring effective cooling and chip evacuation.

To ensure proper coolant sealing performance, the cutting tool must match the nominal collet diameter and be inserted over the entire clamping length. This guarantees optimal force distribution and maximum coolant sealing reliability.

Due to their precision, reliability and coolant delivery capability, ER20 JET sealed collets with neoprene inserts are widely used in automotive manufacturing, aerospace production, mold and die machining, precision CNC machining and machine tool maintenance, providing an ideal solution for workshops and production environments requiring high clamping accuracy and efficient coolant management.