Dyson Digital Motor (Vacuum Cleaners)

[templecorran]

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.

Excuse me, My point had to do with the expected life of the motor under the conditions it was designed to be used in, verses the life expectancy of the application to which is suggested in this thread. In practice the component that fails is the bearing at the business end of the motor.

I modified the base of a B&Q 1020W router (£25) for use as my RockCliff spindle. After more than 100 hours of use, my router ground to a halt with a failed bearing. I was somewhat surprised when looking for a replacement that the 6003ZZ bearings are typically rated for 22000 RPM in grease and 28000 in oil. The max speed for the router is 34000!.

I've attached the 3d dxf of the modified base for your amusement. Please don't ask for g code. My final design removed material around the base to lighten it considerably.

I better stop here -- this is getting waay off topic!