Cheap NORTON Grinding Wheel, T1, 12x11/2x5, AO, 60G, Sft,You can get more details about NORTON Grinding Wheel, T1, 12x11/2x5, AO, 60G, Sft:Shopping Guide on ... 11/2 In., Arbor Size 5 In., Abrasive Material Aluminum Oxide, Bond Type Vitrified, 60 Grit, Grade Medium, Hardness Soft (H), Max. RPM 2070, Purple ...