The BT40 ER Collet Chuck (ER20) is a precision tool holder designed for BT40 spindle systems, delivering secure tool clamping and dependable performance for high‑speed milling operations.

• BT40 spindle compatibility: specifically engineered to mate with BT40 spindles for stable, reliable toolholding in common CNC milling setups.
• ER20 collet clamping: supports ER20 tooling to accommodate a wide range of cutting tools with consistent grip and concentricity.
• Speed rating: optimized for high‑speed machining up to 20,000 RPM to maximize productivity on demanding jobs.
• Concentricity and runout: G2.5 precision rating ensures excellent tool concentricity with minimal runout, improving cut finish and dimensional accuracy.
• Gauge length: 120 mm gauge length provides balanced rigidity and predictable tool projection in BT40 tooling setups.
• Form AD: Form AD design ensures robust, repeatable seating and compatibility with standard BT40 tooling components.

This collet chuck translates secure tool retention into tangible machining benefits: tighter tolerances, cleaner surface finishes, and reduced tool wear. With its precise geometry and reliable clamping, it’s well suited for pocketing, finishing passes, and detailed contour work on a variety of materials. Ideal for small shops seeking consistent results across frequent tool changes and mixed workloads, the BT40 ER Collet Chuck helps you achieve repeatable accuracy at higher speeds.