Advanced 7/24 Taper Toolholder/Spindle Interfaces for High-Speed CNC Machine Tools

The paper formulates basic requirements to the tool-holder/spindle interface for different machining operations. A comparison of some alternative and commercially available designs is presented. Two advanced interface designs which are fully compatible with existing 7/24 taper spindles and toolholders while providing enhanced accuracy in axial and radial directions, higher stiffness, insensitivity to high rpm, and reliability at high rpm are described and results of their evaluation are presented.