The dyson motor doesn't show any sizes, but 100k spindle motors are not impossible to make. They're commonly used for PCB production > Some of the high perform

The dyson motor doesn't show any sizes, but 100k spindle motors are not impossible to make. They're commonly used for PCB production > Some of the high performance spindle motors used on large-size mass production PCB drilling machines are capable of running at 200,000 rpm or higher. from http://www.mitspcb.com/edoc/spindle.htm http://www.mitspcb.com/edoc/spindle.htm