Having started to look at bearings for high speed operations it looks like your burn out after a 100 hours may well be 'par for the course'. I looked at angular contact bearings with rated speeds of up to 200,000 rpm (phew!) and when you take into account preloading and cooling and lubricants and distortion of the shells due to centrifugal force, blah, blah, blah then 100 hours is 'par for the course'. Anyway back to the Dyson motor. If it contains bearings that will stand up to a 100 hours usage (which lets face it, for say a years warranty is ball park reasonable to expect) then maybe the motor is worth consideration.
Quote Originally Posted by templecorran View Post
I had the main bearing on my router burn out (literally) after about 100 hours running. So my point is that the duty cycle for the Dyson may be short. How long does your PCB 'etching' typically take to run? I realise it depends on the amount of material to be removed. Compare that to the time it takes to vacuum the floors that the Dyson is designed for.