...What is your opinion?
I'm thinking that 300k rpm is a bit too much, for carbide on soft
stone; might overheat?
So a 50k micromotor might be good; though the question also arises
whether there is a difference between the $350 RAM, the $1000 dental
micromotors, and the $150 chinese dental micromotors-- and, are they
standardized? There's a working DC converter for a micromotor on ebay
right now, going cheap; and if then paid $100 for a random micromotor
handpiece, will the connection necessarily work?
How do $300 micromotors stack up to a $10 micro die grinder + $300
compressor (that can be found used for $150)?
For something larger, 1/8" or 1/4" shank burrs, what about
foredoms v. die grinders?