GAETANO CAPORALI ERC50.D Standard ER50 collets, DIN ISO 15488 (DIN6499), diameter of your choice
(Incl. Tax: €51.35)
The ER50 standard collet according to DIN ISO 15488 (DIN 6499) is designed for precise clamping of cylindrical tools in ER50 collet chucks used on CNC machining centers, automatic lathes, and machine tools. Featuring 16 elastic slots for uniform clamping force distribution, it ensures run-out accuracy up to 0.008 mm and excellent stability during milling, drilling, and precision machining operations. With a clamping range -1 mm and Rz 1.6 surface finish, this collet provides reliable gripping, high precision, and long service life in industrial machining environments.

The ER50 standard collet according to DIN ISO 15488 (DIN 6499) is a high-precision tool clamping component designed for demanding machining operations. Manufactured in compliance with the internationally recognized ER collet standard, this clamping system ensures full compatibility with all ER50 collet chucks used on CNC machining centers, automatic lathes, and precision metalworking machines.
The tapered geometry of the collet provides progressive and uniform tool gripping across the entire contact surface, ensuring stability even during heavy machining operations such as milling, drilling, and boring. The design incorporates 16 precision-cut slots, allowing elastic deformation of the collet body and enabling uniform distribution of clamping forces.
With a concentricity accuracy up to ≤0.008 mm, ER50 collets allow extremely precise machining results, improving surface finish quality while reducing tool wear. This makes them particularly suitable for industries requiring high repeatability and accuracy such as automotive manufacturing, precision engineering, and advanced industrial machining.
The collets are produced with metric bore sizes arranged in progressive increments, allowing coverage of a wide range of tool diameters with a clamping range -1 mm. This means that each collet can securely clamp tools slightly smaller than the nominal diameter while maintaining optimal stability and holding force.
Internal surfaces are finished with a roughness of Rz 1.6, ensuring high-quality contact between the collet and the tool shank. This improves gripping reliability and minimizes the risk of slippage during high-speed machining operations.
Thanks to their high manufacturing accuracy, durability, and reliable clamping performance, ER50 DIN 15488 collets are an essential component of modern modular toolholding systems used in CNC machining environments. They provide an optimal balance between precision, operational reliability, and long service life.
For technicians, engineers, and production specialists, ER50 collets represent a professional solution for achieving consistent machining performance in milling, drilling, and high-speed machining applications.

Technical Specifications – ER50 Collet DIN ISO 15488
| Standard | DIN ISO 15488 (DIN 6499) |
| Collet Type | ER50 |
| Class | Class 1 – Metric bores |
| Available collet diameters | D6 – D34 mm |
| Diameter progression | 1 mm |
| Clamping range | -1 mm |
| Run-out accuracy | ≤ 0.008 mm |
| Number of slots | 16 |
| Surface finish | Rz 1.6 |
| Cone angle α | 8° |
| Nut seat angle | 30° |
| Dimension A | 50 mm |
| Dimension B | 52 mm |
| Length L | 60 mm |
| Dimension H | 21 mm |
- Brand:
- GAETANO CAPORALI
- Typology:
- Standard ER collet