"Spindle growth" is an unfortunate term which leads down a non-productive path because it's expressed as displacement rather than power (Watts). It's better to consider spindle heating in terms of power required to spin at a given speed because this leads to a deterministic approach to managing the problem. For spindles in general, whatever you do to increase stiffness - such as increasing bearing diameter or preload - increases the torque required to spin the rotor. (An exception is increasing inlet pressure to air bearings.)
展开▼
