Iyo chaiyo yekubereka ine chaiyo uye inotenderera yakanyatsojeka dimension precision ipurojekiti inokwira pamigero, inosanganisira mukati dhayamita, kunze dhayamita, upamhi, chamfer saizi kushivirira kana kubvumidzwa kukosha.Geometric accuracy includ diameter deviation, average yemukati dhayamita kutsauka, kunze dhayamita kutsauka, avhareji dhayamita mhete hupamhi kutsauka mune imwe radial plane.rotation kururamisa kuri kutenderera Pendulum, kusanganisira mhete yemukati uye yekunze mhete radial swing uye axial runout, Side remukati mhete uye yekunze dhayamita pepamusoro pependicularity kushivirira range.Kutakura precision giredhi kubva kune general giredhi 0 kusvika ku6, 5, giredhi 4 uye giredhi 2, zvakare, pazasi pane tafura kuenzanisa pakati pepreeision kirasi yechina GB 307 uye imwe precision standard.Giant bearing precision giredhi kubva kugiredhi 6, 5, 4 uye 2 mazinga emagiredhi mana. 

Mhete yekunze 11, mhete yemukati gumi nembiri, uye bhora gumi nenhatu izvo zvinotakura zvikamu 0.95 mass% kana kupfuura uye 1.10 mass% kana shoma kabhoni, 0.05 mass% kana kupfuura uye isingasviki 0.3 mass% silicon, 0.10 mass% kana kupfuura uye 0.50 mass% 11 A yekunze kwemhete mijaho uye 12 A yemukati mhete mijaho inova nzvimbo ine simbi ine manganese anotevera, 1.30 mass% kana kupfuura, uye 2.00 mass% kana zvishoma, uye ine simbi iyo inoumbwa nesimbi yasara uye kusachena, uye kusangana nezvimwe zvinoumba. Uye avhareji yenitrogen iri munzvimbo dzepamusoro 11B, 12B, uye 13B dzinova matunhu ari mukati mehudzamu hwe20 μm kubva pabhora rinokunguruka 13A i0.2% nekuwanda kana kudarika uye 0.7% nekuwanda kana kushoma, uye pamusoro. matunhu akaturikidzana 11B, 12B, 13B, 5 kana kupfuura macarbides ane dhayamita ye0.5 micrometer kana zvishoma aripo pa100 micrometer.