ʻOi aku ka maikaʻi o ka hoʻohana ʻana i nā bearings wili hoʻopili angular SGL inā pono ka pololei kiʻekiʻe a me ka paʻakikī ma waho aʻe o ka hiki ke hāpai i ka ukana kiʻekiʻe. Hoʻokō ʻia ke kikoʻī kiʻekiʻe loa ma o nā apo pololei, mīkini, paʻakikī a me nā apo bearing honua me kahi ʻaoʻao triangular. Hoʻonohonoho ʻia kahi hui wili a me ka hale paʻahao mai ka plastic pale ʻaʻahu ma waena o nā apo bearing. ʻO ka hoʻohana ʻana i nā mea wili quadratic (ua like ke anawaena me ka lōʻihi) e hoʻomaikaʻi nui i nā kūlana kinematic i loko o ka bearing. Holo like ka bearing me ka haʻahaʻa haʻahaʻa a kūpono no nā wikiwiki kiʻekiʻe.
