How to Read a Grinding Wheel Spec
WEBJun 15, 2014 · A36 A means it is an aluminum oxide grinding wheel and the 36 means the grinding wheel is composed of a medium grain size also known as grit. See the grain size chart below. A/O also means aluminum oxide; RPM is the Revolutions Per Minute or Maximum Operating Speed not all specifiions will show this. The tool, the grinding .