Resharpening

Resharpening is the process of restoring a sharp edge to a blade or cutting tool that has dulled after use or been damaged. It differs from initial sharpening in that the blade’s basic shape and bevel are already established; resharpening focuses on reestablishing and refining the edge itself, removing deformations and burrs.

Commonly resharpened items include kitchen knives, pocket knives, scissors, chisels, plane irons, and saw teeth, among other woodworking and gardening tools. Some professionals use specialized resharpening systems to maintain a consistent angle, while hobbyists may rely on sharpening stones, honing steels, or commercial grinding equipment.

Technique involves choosing an appropriate method and abrasive, preserving the existing bevel angle, and progressively refining the edge from coarse to fine grit. Manual methods typically use whetstones or diamond stones; power methods may employ grinding wheels or belt sanders. After creating a new edge, a burr is removed by finishing with finer grits and often a leather strop. Some blades benefit from a light honing between resharpenings to realign the microscopic edge.

Material and design influence resharpening limits. Harder steels can tolerate more sharpening passes but may become brittle if overheated. Excessive heat during sharpening can temper the steel and reduce edge retention. Repeated resharpening thins the blade and can alter geometry, so significant wear or structural damage may require replacement rather than resharpening.

Safety and maintenance: keep the blade cool, maintain a steady angle, secure the blade during sharpening, and work in a well-lit area. After sharpening, test the edge with careful cuts or paper, and store tools properly to minimize dulling.