Kua hangaia ngā peera roera whakarara kotahi te rarangi hei whakauru i ngā kawenga radial me te axial, ā, he iti hoki te waku i te wā e whakamahia ana. Ka taea te whakairi motuhake i te mowhiti o roto, me ngā roera me te whare herehere, mai i te mowhiti o waho. Mā ēnei wāhanga ka taea te wehe me te whakawhiti ka taea te whakauru, te tango me te tiaki. Mā te whakairi i tētahi peera roera whakarara kotahi te rarangi ki tētahi atu, me te whakamahi i te utaina mua, ka taea te whakatutuki i te tono peera pakari.
He rite tonu ngā ātete ā-ahu me te ā-ira mō ngā peera roera whakarara. Mā tēnei ka pai te tohatoha kawenga, ka whakaiti i te haruru me te wiri, ā, ka taea te whakatakoto tika ake i te kawenga mua.
