ʻO ka pololei o ka bearing he kiko a me ka wili ʻana o ka pololei o ke ana ʻana he papahana ia e kau ana ma nā ʻau, me ke anawaena o loko, ke anawaena o waho, ka laulā, ka nui o ka chamfer a i ʻole ka waiwai i ʻae ʻia. ʻO ka pololei Geometric e komo pū me ke anawaena, ka awelika o ke anawaena o loko, ka ʻaoʻao o waho o ke anawaena, ka awelika o ke anawaena o ke apo ma ka mokulele radial hoʻokahi. ʻO ka pololei o ka wili ʻana he Pendulum wili, me ke apo o loko a me ke apo o waho a me ka holo ʻana o ke axial, ka ʻaoʻao o ke apo o loko a me ke anawaena o waho o ka laulā o ka perpendicularity tolerance. ʻO ka papa pololei o ka bearing mai ka papa maʻamau 0 a 6, 5, papa 4 a me ka papa 2, ma lalo iho nei ka hoʻohālikelike papa ma waena o ka papa preeision o Kina GB 307 a me nā kūlana kikoʻī ʻē aʻe. ʻO ka papa pololei o ka bearing nui mai ka papa 6, 5, 4 a me 2 o nā pae ʻehā. 

ʻO ke apo waho 11, ke apo o loko 12, a me ka pōpō 13 ʻo ia nā ʻāpana e hali ana he 0.95% nuipa a ʻoi aku paha a me 1.10% nuipa a emi mai paha ke kalapona, 0.05% nuipa a ʻoi aku paha a emi mai ma mua o 0.3% nuipa silicon, 0.10% nuipa a ʻoi aku paha a me 0.50% nuipa 11 A o nā ala heihei apo o waho a me 12 A o nā ala heihei apo o loko ʻo ia ka ʻili i hana ʻia me ke kila nona ka manganese ma lalo nei, 1.30% nuipa a ʻoi aku paha, a me 2.00% nuipa a emi mai paha, a nona ke kila nona ke koena hao a me ka haumia, a me nā pilina me nā ʻāpana ʻē aʻe. A ʻo ka awelika o ka nui o ka naikokene ma nā ʻāpana papa ʻili 11B, 12B, a me 13B ʻo ia nā ʻāpana i loko o ka hohonu o 20 μm mai ka ʻili poepoe 13A he 0.2% ma ke kaumaha a ʻoi aku paha a me 0.7% ma ke kaumaha a emi mai paha, a ma nā ʻāpana papa ʻili 11B, 12B, 13B, 5 a ʻoi aku paha nā carbides me ke anawaena o 0.5 micrometer a emi mai paha no 100 micrometer.