1. Taurin
na'ura mai fashewaYashi na karfe: lokacin da taurin harbin karfe da yashi na karfe ya fi na bangaren, canjin darajar taurinsa ba zai shafi karfin fashewar harbin ba. Ƙarfin da
na'ura mai fashewaan rage shi zuwa ƙarfin fashewar harbi; lokacin da harbin karfe da grit ɗin karfe sun fi sassauƙa da laushi, idan ƙimar ƙarfin ƙarfi na harbi ya ragu, ƙarfin fashewar harbi shima yana raguwa. Idan ba a sami tasirin da ake so ba, ikon da
na'ura mai fashewaza a iya ƙara daidai. don ƙara ƙarfin fashewar harbi.
2. Yawan fashewar harbe-harbe: Lokacin da yawan fashewar harbe-harbe ya karu, ƙarfin fashewar harbi yana ƙaruwa, amma idan adadin ya yi yawa, lalacewar harbin karfe da yashi na karfe yana ƙaruwa.
3. Girman girman
na'ura mai fashewakarfe grit: Girman harbin karfe, mafi girman ƙarfin motsin bugun, kuma mafi girman ƙarfin fashewar harbi. Sabili da haka, lokacin da aka ƙayyade ƙarfin fashewar harbi, ya kamata mu zaɓi ƙaramin ƙarfe na ƙarfe kawai da grit ɗin ƙarfe, ta yadda ƙimar tsaftacewa za ta ƙaru. Girman fashewar harbin kuma yana iyakance da siffar sashin. Lokacin da akwai tsagi a ɓangaren, diamita na harbin karfe da grit ɗin ƙarfe ya kamata ya zama ƙasa da rabin radius na ciki na tsagi.
4. Hasashen kusurwa: Lokacin da jet na karfe harbi da karfe yashi ne perpendicular zuwa workpiece da za a fesa, da ƙarfi na karfe harbi da karfe yashi ne in mun gwada da kyau, kuma yawanci ya kamata a kiyaye a cikin wannan jihar don harbi ayukan iska mai ƙarfi. Idan an iyakance shi da sifar sassan, lokacin da ake buƙatar ƙaramar harbin iska mai ƙarfi, girman da ƙimar harbin ƙarfe da grit ɗin ƙarfe ya kamata a ƙara da kyau.