Rod ɗin Hako
Kayan aikin tiwatarwa na tiwatarwa sun wakilci kayan girmamawa na muhimmi a cikin tsarin tiwatarwa na kasa, suna kafa tushe na tsarin tiwatarwa da ake amfani da shi a cikin ayyukan tiwatarwa. Waɗannan kayan aikin tiwatarwa na cylindrical steel suna watsa torque na rotational, axial loads, da kuma makamashin da aka kawaya daga kai tiwatarwa ko mashi zuwa auger, kayan aikin gini, ko bututun tiwatarwa a kai tsaye. A cikin ayyukan tiwatarwa—na tiwatarwa na kai tsaye da kuma tiwatarwa na kai tsaye—kayan aikin tiwatarwa na tiwatarwa suna ba da damar ci gaba na tsarin tiwatarwa na hollow-stem, continuous flight, ko kayan aikin tiwatarwa na musamman ta hanyar substrates na kasa da ke da matsala yayin da suke riƙe da daidaito da kuma watsa kai tsaye. Zaɓin da kuma bayanin kayan aikin tiwatarwa na tiwatarwa suna da tasiri direct ga ingancin tiwatarwa, aikin tiwatarwa, da kuma ƙarfin tsarin tiwatarwa da aka kammala. Tsarin kayan aikin tiwatarwa na zamani ya bukaci a yi la'akari da yanayin kasa daban-daban, daga kasa mai laushi da silt zuwa kasa mai ƙarfi, gravel layers, da kuma karkashin karkashi na kankara, wanda bukatar tsarin injiniya na zaɓi ya dogara da yanayin kasa da kuma buƙatun kai tsaye na tiwatarwa.