Sharpening machine designed for fast, high-quality and convenient sharpening straight and shaped (semi-circular) blades log lathe OCS-1M, OCS-2AM, 3AM, OCS, OCS-4M and UHS machines chashkoreznyh UHS-2M, UHS-3M. Grinder has 2 modes of grinding: the rolling (straight sharpen knives) and rotation (semicircular sharpen knives), on the restructuring of one or the other mode is done with special clamps. The required radius of rotation is set with a special line, situated on a movable carriage of the machine and the table diameter blades. Due to the rotary conductor, smooth flow and an adjustable stop is achieved ideal geometry of sharpened knives.