Ngwaahịa a dabara adaba maka obere ngwaọrụ na desktọpụ akpaaka na-egweri ihe, na-agbanwe na obere ike egweri, nke nwere ike melite usoro egweri nke workpiece ma dị mfe iji dochie ya.E jiri ya tụnyere ngwá ọrụ abrasive omenala, eriri naịlọn abrasive nwere uru ndị a: ọ nwere ike ijikwa obere ntakịrị ihe na-egweri, ịdị omimi na-egweri, mgbochi mgbochi, ma nwee obere ohere nke ntachi obi.Ngwaahịa na-anọgide na-ekpughe ọkwa ọhụrụ abrasive n'oge a na-egweri ihe, na mmetụta nsị dị mma.