cup grinding wheel diameter: 120-350mm silicon carbide and aluminum oxide material Product Discription Vitrified Bonded Grinding Wheels are used for grinding, lapping, honing and polishing. The characteristics of a grinding wheel are determined by type of abrasive grain, grade, bond, structure, shape and dimensions.Vitrified Bonded Grinding Wheels Comparison Chart For Hardness Grade ChinaGB2484- ...