Iyo chaiyo yekubereka ine chaiyo uye inotenderera yakanyatsojeka dimension precision ipurojekiti inokwira pamashafts, 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 kururama kuri kutenderera Pendulum, kusanganisira yemukati mhete uye yekunze mhete radial swing uye axial runout, Side yemukati mhete uye yekunze dhayamita pepamusoro pependicularity kushivirira range.Kutakura giredhi rakananga kubva kugiredhi reruzhinji 0 kusvika ku6, 5, giredhi 4 uye giredhi 2, zvakare, pazasi pane tafura kuenzanisa pakati pepreeision kirasi yechina GB 307 uye mamwe madhigirii chaiwo.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 kushoma kabhoni, 0.05 mass% kana kupfuura uye isingasviki 0.3 mass% silicon, 0.10 mass% kana kupfuura uye 0.50 mass% 11 A yemigwagwa yemhete yekunze uye 12 A yemigwagwa yemhete yemukati 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 yepakati munzvimbo 11B, 12B, ne13B inova matunhu ari mukati mehudzamu hwe20 μm kubva pabhora rinokunguruka 13A i0.2% nehuremu 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.