Tool and Cutter Grinder

[TomG]

(02-26-2014, 09:55 PM)Hawkeye Wrote: I think I tried to incorporate some of the features of that one, plus some from other sources. I tried injecting air, but it didn't make the spindle move any easier. I haven't seen any plans for an air spindle.

Making an air bearing is pretty much beyond the reach of the home machine shop. Clearances are on the order of 5-50 microinches and the air must be clean, dry and well regulated for the bearing to function. Too much or too little air pressure will move the shaft off center so it binds on one side.

Tom