Quote Originally Posted by MartinT View Post
Indeed not. A simple test of spinning the platter with the power off shows that it is a very well engineered bearing with small frictional losses.
In my ignorant world, friction is one thing, drag is another (try charging a stock bearing with hypoid viscous gear oil and feel the difference. i call this "drag," for want of another term).

Apologies for upsetting experienced engineers..