Ma muli o ke kihi helix, e hoʻonui ʻia ka ʻoki ʻoki ʻoki ʻana o ka pā i ka piʻi ʻana o ke kihi helix.Hōʻike ka ʻike iā mākou: No ka hana ʻana i nā metala ferrous, ʻoi aku ka liʻiliʻi o ke kihi helix, ma kahi o 30 degere, e hōʻoia i ka ikaika o nā niho helical a kōkua i ka hoʻolōʻihi ʻana i ke ola o ka paipa.No ka hana ʻana i nā metala non-ferrous e like me ke keleawe, aluminika, magnesium, a me ka zinc, ʻoi aku ka nui o ke kihi helix, hiki ke ma kahi o 45 degere, a ʻoi aku ka ʻoi o ka ʻoki ʻana, maikaʻi ia no ka wehe ʻana i ka chip.