I am considering either buying a machine (https://www.ebay.co.uk/i/153186676769?chn=ps)
Or, possibly converting a bench grinder that I have. The question I am asking, is about the RPM. Both options have a RPM of about 3000, which I thought was a bit high.
Is it possible to burnish safely, without generating too much heat with 3000RPM? I notice that the Cobra machine has a speed of 2-3000RPM
Can the high speed be compensated for by reducing the pressure applied?