High precision ER20 collets compliant with DIN 6499 are designed to provide stable, accurate and repeatable tool clamping in CNC machines, automatic lathes and machining centers. Manufactured from high-alloy steel, hardened and ground, they ensure excellent geometric stability even under demanding machining conditions, reducing deformation, vibration and transmission play.

Their working principle is based on controlled elastic deformation, allowing uniform clamping force distribution across the entire tool surface. This improves concentricity control and significantly reduces geometric errors during machining.

Available versions differ by clamping range. Narrow range collets (e.g. 1.0–3.0 mm) are optimized for high precision applications requiring maximum concentricity and minimal tolerance. Wider range versions (e.g. 4.0–13.0 mm) provide greater flexibility, covering multiple tool diameters with a single collet, with slightly reduced but still industrial-grade precision.

These collets are suitable for milling, drilling, boring and tapping operations, including applications with through-coolant systems. Their stable clamping improves surface finish, dimensional accuracy and tool life.

They are widely used in demanding industries such as automotive, aerospace, precision engineering and complex component manufacturing. They also play a key role in quality control processes where clamping repeatability directly affects measurement accuracy.

Compliance with DIN 6499 ensures full compatibility with ER collet chucks, enabling easy integration into existing tooling systems.