ʻEhā mau mea maʻamau ka lawe ʻana i ka pōleʻa: ʻo ke kinipōpō, ke apo i loko, ke apo o waho, a me ka hale. Kūleʻa nā bearings ʻoihana ʻoihana i nā kūlana AISI 52100. Hana ʻia nā pōpō a me nā apo i ke kila chromium kiʻekiʻe me ka paʻakikī Rockwell C-ma kahi o 61-65. ʻO ka mea hoʻopaʻa, he ʻoi aku ka paʻakikī ma mua o nā pōpō a me nā apo a hiki ke hana ʻia me ka metala (e like me ke kila kalapona a me ke alumini alumini) a i ʻole nā mea metala ʻole (e like me Teflon, PTFE, a me nā mea polymer). He haʻahaʻa ka haʻahaʻa haʻahaʻa o ka poʻe bearings ma mua o nā bearings journal, e hopena i ka haʻahaʻa haʻahaʻa i ka māmā holo like.