ER-SK40 SCHUNK ER16, ER20, ER25, ER32, ER40 collets chuck with SK40 shank DIN ISO 7388-1 AD/AF for clamping tools with cylindrical shank DIN ISO 15488-B, length of your choise
(Incl. Tax: €103.32)
The SH-ER-SK40 SCHUNK collet chuck is designed for precision clamping of tools with cylindrical shanks, adhering to DIN ISO 15488-B standards. Available in sizes ER16, ER20, ER25, ER32, and ER40, this collet chuck features a SK40 shank that complies with DIN ISO 7388-1 AD/AF specifications. The special care taken in manufacturing allows for a maximum concentricity error of less than 8 microns (< 0.008 mm) detected at a distance of 2.5xD. The perfect balance of G2.5 safely allows spindle rotation up to 25,000 rpm or with a maximum residual imbalance of Umax<1gmm. Due to its robust and precise construction, it ensures high reliability and high-performance during use.

The images shown are indicative and not to scale.
The ER collet chuck with SK40 interface is a high-precision tool holder designed to meet the demands of professionals and specialized operators in mechanical engineering, CNC machining and high-performance milling. It is intended for clamping cylindrical shank tools by means of collets in compliance with DIN ISO 15488-B, ensuring maximum compatibility and versatility in a wide range of applications.
Technical Data:
| Measure | Clamping range |
| ER16 | 1 - 10mm |
| ER20 | 1 - 13mm |
| ER25 | 1 - 16mm |
| ER32 | 2 - 20mm |
| ER40 | 4 - 26mm |
The ER system stands out for its wide clamping range, which allows secure holding of tools with different shank tolerances, simplifying tool management and reducing the need for dedicated holders. The SK40 interface guarantees extremely rigid and precise coupling with the machine spindle, providing stability and repeatability even in high-speed machining, where tight geometric tolerances and high surface quality are required.
A key feature is the G2.5 balance grade, which ensures optimal performance even at high rotational speeds, minimizing vibrations and wear. This chuck is capable of reaching a maximum rotational speed of 25,000 rpm, making it particularly suitable for High Speed Cutting (HSC) operations and for applications that require extreme reliability of the clamping system.
The included clamping nut allows uniform and secure tightening of the collet, improving overall stability and making tool mounting and replacement easier. The combination of the SK40 body, ER collets and clamping nut provides an efficient, precise and durable system, capable of ensuring consistent performance both in workshops and in advanced machining centers.
- Brand:
- SCHUNK
- Typology:
- ER with standard ring nut