BT40 ER Collet Chucks | Guhring

Engineered to deliver exceptional clamping security, high structural rigidity, and reliable concentricity, the Guhring BT40 ER Collet Chuck range is the workhorse of modern production milling and drilling applications. Manufactured to strict MAS 403 BT industrial standards from premium, fully hardened alloy steel, these high-performance CNC tool holders feature a precision-ground taper that ensures seamless spindle contact and ultra-low runout. Pre-balanced for high-speed machining environments, Guhring's BT40 ER series minimizes spindle vibration, directly protecting your machine tool bearings and extending the tool life of your solid carbide end mills and drills. Compatible with standard ER spring collets, this versatile tool holding collection delivers industrial-grade torque transmission across a broad spectrum of engineering, fabrication, and manufacturing workflows.