The BT40 Slim Shrink Fit Chuck is a compact, high-precision toolholding solution designed for BT40 spindles. Its slim profile improves accessibility in tight workspaces while delivering strong clamping and consistent accuracy for milling, drilling, and high-speed operations.

Engineered to BT MAS403 (JIS 6339) standards, this chuck combines robust clamping strength with rigidity to keep tools firmly in place at speed. With a 3-degree taper and Form AD/B, it is precisely balanced to G2.5 @ 25,000 RPM for stable performance in demanding applications.

• Slim, accessible design: The compact 120 mm gauge length and 20 mm clamping diameter provide improved reach in tight machines while maintaining secure, repeatable grip on tools.
• Precision-balanced performance: 3-degree taper with Form AD/B and G2.5 balance at 25,000 RPM delivers stable, vibration-free operation and tight runout control for precise milling.
• Standards-driven rigidity: Built to BT MAS403 (JIS 6339) standards ensures reliable clamping strength and durability in challenging production environments.

With these features, you’ll experience quicker setup and tool changes, more consistent finishes at high speeds, and longer tool life due to secure retention. The BT40 Slim Shrink Fit Chuck is a dependable choice for engineers, machinists, and hobbyists who demand accuracy, reliability, and repeatable results in busy shops.