The Omega BT40 Slim Shrink Fit Chuck is a compact, high-precision tool holder designed for BT40 spindles. It’s ideal for engineers, buyers, tradespeople, hobbyists, and shop floors that need reliable clamping and easy access in tight spaces, delivering accurate toolholding without sacrificing workflow efficiency.

With an 18 mm clamping diameter and a 120 mm gauge length, this chuck combines robust grip with a slim profile. Manufactured to BT MAS403 (JIS 6339) standards, it features a 3-degree taper and Form AD/B, and is balanced to G2.5 @ 25,000 RPM for stable, high-speed performance and reduced vibration in demanding applications.

• Compact, Slim Design for Tight Access: The slim shrink-fit body fits into restricted work envelopes while maintaining a strong, consistent grip on tooling in high-speed machining.
• BT MAS403 (JIS 6339) Compliance for Consistent Reliability: Exacting tolerances and durable construction ensure repeatable clamping and long-term rigidity in production environments.
• High-Speed Balance for 25,000 RPM: The 3-degree taper and Form AD/B deliver precise balance at 25,000 RPM, providing stable toolholding and minimizing runout during high-speed milling and drilling.

Across demanding milling and drilling operations, this chuck helps you maintain tight tolerances and achieve smooth finishes. The compact design improves accessibility, while the robust clamping and precise balance support reliable performance and consistent results from setup to final cut.