Delphi VII Motor Bearing

About the Delphi VII Motor Bearing

The Oracle Delphi Mk VII motor bearing is a state-of-the-art assembly designed to achieve the highest level of rotational accuracy and minimal vibration. It replaces the traditional two-bushing system with a dual tripod main bearing design using six precision surfaced PEEK screws arranged in two sets of three screws offset by 60 degrees. The thrust plate supporting the platter spindle's tungsten carbide ball tip is made of glass-filled Torlon, a non-metallic material, to reduce resonance and bearing chatter. This bearing design allows very precise calibration of the spindle holder assembly, minimizing micro-movements and vibrations. The motor is a specially selected AC synchronous motor with impedance-matched internal windings, driven by a precision frequency generator with military-grade capacitors to smooth the sinewave feeding the motor coils. This results in a vibration-free, stable rotation essential for high-fidelity audio playback. The bearing assembly is part of a comprehensive system including a two-piece platter assembly that facilitates belt installation and reduces platter resonances, and a Turbo Mk II power adaptor for optimized motor drive stability. The bearing and motor system are calibrated by ear to achieve the best equilibrium and sound quality.