1) Wheel bore fits:
Corundum or No diamond: Gf7
Diamond or CBN: Gh4
2) Wheel selection must be in accordance with the manufacturer's recommandation for maximum speed. Compliance with ANSI Safety Requirements B 7.1 must be adhered to.
For safety reasons, noise levels and finish quality of all rotating component including the grinding wheels must be balanced.
GMN recommend balancing the system within G 2.5 level, according to ISO 1940.