Ingxenye enkulu yempilo yesevisi yeketanga ingenxa yokwelashwa kokushisa, ngakho-ke, inkampani yethula ngokuqhubekayo imishini yokwelashwa kokushisa futhi ithuthukisa inqubo entsha yokwelashwa kokushisa; umthwalo wokugcina wamaketanga ikakhulu uncike kwinqubo yokwelashwa kokushisa kwengcezu; isikhathi sokuqala sokunwebeka nokugqokwa kokuqina (impilo yesevisi) yeketanga ikakhulu kuncike kwinqubo yokwelashwa kokushisa komkhono nephini shaft; ngokusho kombono womgqomo, ikhwalithi yeketanga lonke eliqediwe incike engxenyeni enekhwalithi ephansi kakhulu Ngakho-ke, silawula ngokuqinile inani lezingxenye, i-carburizing noma i-quenching nesikhathi se-tempering ukuqinisekisa ukufana kwekhwalithi yengxenye ngayinye, ukuze ukuqina kobuso nokuqina kwangaphakathi kwengxenye ngayinye kungafinyelela inani elilinganisiwe elilungile, ukuze kuzuzwe ukuzinza kwekhwalithi yochungechunge lomkhiqizo ophelile.