Sharpening & grinding

Sharpening and grinding are material-removal processes by abrasion: grains of abrasive material—aluminium oxide, silicon carbide, CBN or diamond—bonded to a wheel, disc or belt remove microscopic chips from the workpiece surface, achieving tolerances and finishes unattainable with geometrically defined cutting tools. Sharpening in the strict sense restores the cutting edge of worn tools—end mills, drill bits, chisels, knives—by re-forming the original geometric profile with precise relief angles. Grinding covers a broader field: from rough deburring of casting flash to precision cylindrical or surface grinding, through to surface polishing. In the maker context, bench grinders and belt sharpeners are essential workshop-maintenance tools: a sharp tool cuts better, lasts longer and reduces the risk of injury. Precision grinding, on the other hand, is a finishing operation that often follows CNC milling or turning to achieve the final dimensional tolerances specified in the design.