Ka taea e ngā peera pōro whakapā koki te tautoko i te kawenga radial me te kawenga axial. I te mea ka taea anake e ngā peera pōro whakapā koki rarangi kotahi te tautoko i te kawenga axial i te ahunga kotahi, he maha ngā wā ka whakamahia te whakairi peera ōrite ki a rātou. I te mea he takirua peera ōrite, he watea ake te utaina mua mō rātou.
He mea hanga ngā pupuri ki te parahi, ki te rino hangai, ki ētahi atu rānei, e whakawhirinaki ana ki ngā āhuatanga o ia peera me ngā tikanga whakamahi.
