The Omega BT40 Slim Shrink Fit Chuck is a high-precision tool holder designed for BT40 spindles. Its slim profile improves accessibility in tight machine spaces, enabling faster tool changes and stable performance without compromising accuracy. Ideal for engineers, machinists, and hobbyists who demand reliable toolholding for demanding milling and drilling tasks.

This model features an 8 mm clamping diameter and a 90 mm gauge length, and is manufactured to BT MAS403 (JIS 6339) standards. Its 3-degree taper and Form AD/B are engineered for balanced, rigid performance, delivering stable operation at high speeds up to 25,000 RPM. The chuck is precisely balanced to G2.5 at 25,000 RPM to minimize vibration and maximize cutting efficiency.

• Slim, accessible form factor: The compact design enhances reach and visibility in crowded setups, enabling quicker tool changes and alignment without sacrificing grip.
• Rigid shrink-fit clamping: Delivers uniform compression around the tool shank for minimal runout, higher rigidity, and dependable cutting performance at high speeds.
• Precision-balanced high-speed performance: BT MAS403 (JIS 6339) compliant with Form AD/B and a G2.5 balance at 25,000 RPM, delivering smooth operation, reduced vibration, and longer tool life.

With the BT40 Slim Shrink Fit Chuck, you gain repeatable, high-precision results across your milling and drilling workloads. Its compact design, strong grip, and superb high-speed stability help you shorten cycle times, reduce downtime, and achieve consistent finishes on a wide range of materials. Built to last and engineered to tight standards, this chuck offers dependable performance you can trust for everyday production or precision prototyping.