Norton general purpose wheels will grind mild to medium hard steels.
150mm diameter general purpose grinding wheels come with a multibush bore reducing bush to allow the wheel to be mounted on any model machine. Other wheels can be bushed to the bore size on request.
For hardened tool steels use a 38A grade wheel.
Always use the machine guard as supplied by the manufacturer. Alteration or removal may result in an oversized wheel being mounted and run at a dangerous speed.
Check the machine speed against the maximum RPM marked on the wheel. DO NOT OVERSPEED!