The Omega BT50 Combi Shell Mill Arbor COMBI27 is a precision mounting shaft designed to hold shell milling cutters on BT50 spindles. It’s built for machinists, machine shops, and hobbyists who need a reliable, high-speed solution for shell milling operations.

The COMBI27 delivers up to 15,000 RPM with a G6.3 precision rating, providing stable, accurate cuts under demanding milling conditions while remaining straightforward to install and use.

• High-speed capability: Up to 15,000 RPM for fast material removal with stable cutting action on BT50 spindles.
• Precise, repeatable accuracy: G6.3 tolerance ensures low runout and consistent machining results across jobs.
• 75 mm gauge length for rigidity and alignment: Provides a solid interface with shell cutters and dependable seating on BT50 machines.

By pairing robust mechanical fit with controlled precision, the COMBI27 helps you streamline setups, minimize downtime, and achieve reliable finishes at high speeds. The combination of rigidity, precision, and ease of use supports longer tool life, tighter tolerances, and consistent performance across diverse shell milling tasks.