Omega Products BT40 Slim Shrink Fit Chuck - G2.5 - 25,000RPM - 4mm Clamping Diameter - 120mm Gauge Length

The BT40 Slim Shrink Fit Chuck from Omega is a high-precision tool holder designed for BT40 spindle systems. Its compact, slim profile improves accessibility in tight machine environments, enabling quick, confident tool changes without compromising grip or rigidity. Manufactured to BT MAS403 (JIS 6339) standards, this chuck delivers reliable clamping strength and consistent performance across demanding milling and drilling tasks.

Engineered for reliable high-speed operation, this chuck features a 3-degree taper and Form AD/B, delivering a sturdy, repeatable grip and minimal runout. It is perfectly balanced to G2.5 at 25,000 RPM, providing exceptional stability and smoothness at top spindle speeds. The 4 mm clamping diameter and 120 mm gauge length offer predictable tool engagement and compatibility with common 4 mm tooling.

• Slim BT40 form factor for improved accessibility: Compact design minimizes interference in crowded machines and speeds up tool changes in tight work areas.
• Rigid clamping with precise taper: 3-degree taper and Form AD/B deliver strong, repeatable gripping power and reduced runout, aligned with BT MAS403 (JIS 6339) standards.
• High-speed balance for stable performance: Balanced to G2.5 @ 25,000 RPM ensures smooth operation, lower vibration, and reliable tool engagement with a 4 mm clamping diameter and 120 mm gauge length.

This chuck helps you maintain tight tolerances and achieve superior surface finishes even at high spindle speeds. Its combination of compact design, proven standards compliance, and precise balance translates to faster setups, reduced downtime, and dependable performance across a range of milling and drilling applications in metalworking, aerospace, automotive, and general manufacturing environments.