02-27-2014, 07:15 AM
Experience has led me to believe that if there is enough clearance between the spindle and the bore you end up with play/potential movement that leads to inaccurate grinding. That said it still ads a lot of life to end mills and allows me to reserve my new ones for more precise precision work.
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.