Abstract
An investigation is described of the lubricating effects of various grinding fluids at both normal and high wheel speeds under geometrically similar conditions. Grinding fluids include air (dry), water, soluble oil in two concentrations, and cutting oil. Results indicate that the specific cutting energy and the attritious wear of the abrasive grains are reduced by lubrication, but the rubbing friction between the workpiece and the wear flats on the grains is not. With high wheel speed, the specific cutting energy is lower with all grinding fluids than with normal wheel speed, but the attritious wear rate is greater. These lubricating effects are related to results for G-ratio, surface finish, and burning conditions.