A rotary grinding wheel apparatus for shaping and sharpening saw blade teeth by grinding the saw blade teeth in a crisscross fashion comprising at least one removable and interchangeable rotary multi-point grinding wheel having a plurality of grinding blades disposed thereon, each of the plurality of grinding blades having at least one angular surface for removing saw blade teeth that are worn or damaged and shaping and sharpening new teeth into the saw blade. In a preferred embodiment, the rotary grinding wheel apparatus further comprises at least one removable and interchangeable single point grinding wheel.

A gin blade sharpening system for sharpening a blank into a blade disk. The gin blade sharpening system comprises two or more grinding stations, a controller, and one or more upper grinders. The one or more upper grinders comprise at least a first upper grinder. The two or more grinding stations comprise at least a first grinding station and a second grinding station. Each among the two or more grinding stations comprise a clamp assembly configured to selectively hold the blade disk in a substantially horizontal position. A portion of the one or more upper grinders can be configured to sharpen an outer perimeter edge of the blade disk using an abrasive pad.

A gin blade sharpening system for sharpening a blank into a blade disk. The gin blade sharpening system comprises two or more grinding stations, a controller, and one or more upper grinders. The one or more upper grinders comprise at least a first upper grinder. The two or more grinding stations comprise at least a first grinding station and a second grinding station. Each among the two or more grinding stations comprise a clamp assembly configured to selectively hold the blade disk in a substantially horizontal position. A portion of the one or more upper grinders can be configured to sharpen an outer perimeter edge of the blade disk using an abrasive pad.

A grinding wheel sharpening device which is mountable a rotary power source. Each of the several configuration of the grinding wheel sharpening devices comprises a grinding wheel body having a drive shaft, the drive shaft configured to be mounted to a rotary power source and adapted to be powered and driven by the rotary power source, at least one abrasive sharpening surface, and a blade rest within which the grinding wheel is disposed during use, the blade rest enabling precision shaping and/or sharpening of a blade.