Abstract <p>This study demonstrates that using AC20 grinding powder selected for uniformity in grain strength and size through adhesive–magnetic sorting in liquid significantly enhances the wear resistance of diamond wheels by up to sixfold. Wheels fabricated with AC32 grains selected from AC20 powder show a threefold increase in wear resistance, while those with AC50 grains achieve a 1.5-fold improvement. In all cases, wheels produced from selected diamond grains exhibit higher wear resistance than those made from the initial, unsorted AC20 powder. The surface roughness parameter (<i>R</i>_a) of workpieces ground with wheels prepared using different adhesive–magnetic sorting options remains essentially unchanged. However, experiments revealed that wheels containing selected AC32 125/100 grains produce polished surfaces with the lowest holding capacity, a factor that must be considered when using such wheels in grinding applications.</p>