He pai ngā peera pōro rarangi-rua mō ngā kawenga radial reo me ngā kawenga axial iti i ngā taha e rua. He rite te hoahoa me te mahi ki te takirua peera pōro rarangi-kotahi. Ka whakamahia ēnei peera i ngā tono kāore e ranea te kaha kawenga o te peera rarangi-kotahi. He rite te diameter o waho me te diameter poka o ngā peera pōro rarangi-kotahi ki ngā peera rarangi-kotahi, engari he whānui ake, ā, he nui ake te kaha kawenga i ngā peera pōro rarangi-kotahi o te raupapa 62 me te 63.
