A grinding machine often shortened to grinder is any of various power tools or machine tools used for grinding which is a type of machining using an abrasive wheel as the cutting tool Each grain of abrasive on the wheel 39s surface cuts a small chip from the workpiece via shear deformation Grinding is used to finish A grinding machine often shortened to grinder is any of various power tools or machine tools used for grinding which is a type of machining using an abrasive wheel as the cutting tool Each grain of abrasive on the wheel 39s surface cuts a small chip from the workpiece via shear deformation Grinding is used to finish