Ukuqina okugqwesileyo kunye nokomelela

Ibandakanya uyilo lolwakhiwo olutsha, amandla aphezulu, uzinzo olugqwesileyo, kunye nobomi benkonzo ende, esi sixhobo sibonelela ngokuchasana ngcono ngexesha lokutyumza, ukwandisa ukusebenza kakuhle okucumzayo malunga ne-10% ukuya kwi-30%; ingalo yayo yehamile ibonelela ngokhuseleko kwi-breaker, ukunciphisa izinga lokungaphumeleli kunye nokuphindaphinda kwe-chisel rod fractures, ngelixa unciphisa ukungcangcazela ukuhambisa amava angcono otyumzayo.