A clamping assembly includes a base defining a spring well. A spring piston assembly is received in the spring well and includes a spring and a piston body. First and second jaws are supported over the base on opposite sides of a central clamp axis that extends vertically through the spring piston and between the jaws, where the jaws are pivotable between an open position and a closed position. A wedge is movable along the central clamp axis between an end of the jaws. A lever has an elongated lever body extending to an end portion defining an L-shape with a toe and a heel, the end portion positioned between the wedge and the spring piston with the toe pivotably connected to the wedge and the heel coupled to the piston body via a linkage. The lever is operable to move the wedge along the central clamp axis.

A roller assembly for sharpening a knife, comprising a cylindrical body and a plurality of surface treatment sections positioned on a first lateral side and a second lateral side of the cylindrical body. Each surface treatment section coupled with the cylindrical body through individual one or more connecting elements. Each surface treatment section providing different degrees of surface treatment to the target surface including coarse grinding, fine grinding, buffing and honing. The two guide elements rotate in synchronization with a sliding movement of the roller assembly along a pitch axis of the cylindrical body. The roller assembly is adapted to provide various surface treatment to sharpening objects.

A vertically oriented honing guide for sharpening edged tools is disclosed. The vertically oriented honing guide for sharpening edged tools eliminates nearly all setup time and is compatible with commercial products by orienting the tools vertically and through the use of a linear guide system. This eliminates the need for tool clamping, facilitates direct angle setting, improves ergonomics, and allows the use of generic sharpening media. Yet, the vertically oriented honing guide for sharpening edged tools may alternatively incorporate a clamping mechanism to clamp tools being sharpened.

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.

An adaptor for mower blade sharpening, the adaptor incorporating a U bracket having a proximal leg having upper and lower ends, a distal leg having upper and lower ends, and a web spanning laterally between the legs'upper ends; the adaptor further incorporating a table underlying the U bracket's web, the table spanning laterally between the U bracket's proximal and distal legs; the adaptor further incorporating mounting flanges for mounting the table upon the U bracket, the mounting flanges forwardly extending the table from the U bracket's proximal and distal legs; the adaptor further incorporating an annular clamp which is fixedly attached to the U bracket's web.