Ukuchaneka kokuchaneka kuqulethe ukuchaneka kunye nokujikeleza ukuchaneka komgangatho wokuchaneka yiprojekthi ekhwela kwi-shafts, iquka i-diameter yangaphakathi, i-diameter yangaphandle, ububanzi, ukunyamezela ubungakanani be-chamfer okanye ixabiso elivumelekileyo. ukutenxa, umndilili wokutenxa ububanzi besangqa kububanzi besangqa kwinqwelomoya enye. Umsesane wangaphakathi kunye nendandatho yangaphandle ye-radial swing kunye ne-axial runout, Icala lendandatho yangaphakathi kunye ne-diameter yangaphandle ye-perpendicularity ukunyamezela uluhlu. iklasi ye-preeision yase-china GB 307 kunye neminye imigangatho echanekileyo.Ibanga elichanekileyo elithwala i-Giant livela kwibanga lesi-6, lesi-5, Amanqanaba 4 no-2 amabakala amane. 

I-ring yangaphandle ye-11, i-ring yangaphakathi ye-12, kunye nebhola ye-13 enezixhobo ezithwala i-0.95 mass% okanye ngaphezulu kunye ne-1.10 mass% okanye ngaphantsi kwe-carbon, i-0.05 mass% okanye ngaphezulu nangaphantsi kwe-0.3 mass% ye-silicon, i-0.10 mass% okanye ngaphezulu kunye ne-0.50 ubunzima% 11 A yeendlela zomdyarho zangaphandle kunye ne-12 A yeendlela zomdyarho zangaphakathi eziyiringi. umphezulu oqulathe intsimbi equlathe le manganese ilandelayo, 1.30 ubunzima% okanye ngaphezulu, kunye ne-2.00 ubunzima% okanye ngaphantsi, kwaye iqulathe intsimbi eshiyekileyo kunye nokungacoceki, kunye noqhagamshelwano namanye amacandelo. Kwaye i-avareji yoxinaniso lwenitrogen kwimimandla yomaleko womphezulu 11B, 12B, kunye ne-13B eziyimimandla ngaphakathi kobunzulu be-20 μm ukusuka kumphezulu oqengqelekayo webhola 13A yi-0.2% ngobunzima okanye ngaphezulu kunye ne-0.7% ngobunzima okanye ngaphantsi, kwaye kumphezulu. imimandla yomaleko 11B, 12B, 13B, 5 okanye ngaphezulu iikhabhide ezinobubanzi obuyi-0.5 micrometer okanye ngaphantsi zikhona I-100 micrometer.