Various name of locking assembly – cone clamping element / taper lock assembly /keyless assembly, It is used as an option to the keys & key ways. Most of the assembly made of shaft & hub. It is used to transmit the torque from shaft to hub. By tightening the clamping screws, inner and outer rings press themselves onto the contact surfaces of the components to be connected, thus creating a friction-fit press connection. This allows not only the highest torques but also axial and radial as well as bending loads to be transmitted reliably.