The Omega BT40 Slim Shrink Fit Chuck is a precision toolholder for BT40 spindles, optimized for high-speed milling. Its slim, compact body improves accessibility in tight machine layouts while delivering secure clamping for 10 mm tooling with a 120 mm gauge length. Manufactured to BT MAS403 (JIS 6339) standards and balanced to G2.5 @ 25,000 RPM, it provides stable, repeatable performance in demanding applications.

• Slim, accessible body: The compact BT40 design fits into tight setups and speeds tool changes, reducing downtime while maintaining grip and accuracy.
• BT MAS403/JIS 6339 compliant: Built to recognized standards for reliable rigidity and consistent clamping across workloads.
• High-speed balance for 25,000 RPM: 3-degree taper with Form AD/B delivers smooth operation, minimizes vibration, and preserves precision during fast milling.

With this shrink-fit chuck, you’ll experience consistent runout control, faster setups, and dependable performance across jobs—whether you’re finishing aluminum parts or hard-to-cut steel. The 10 mm clamping diameter and 120 mm gauge length provide a predictable interface with compatible tooling, helping you reduce rework and improve surface finishes while extending tool life.