The nkenke nke ibu nwere nkenke na ntụgharị accuaracy akụkụ nkenke bụ oru ngo nke na-arịgo n'elu osisi, ọ na-agụnye n'ime dayameta, n'èzí dayameta, obosara, chamfer size ndidi ma ọ bụ kwe uru. deviation, nkezi dayameta mgbanaka obosara deviation na otu radial plane.rotation ziri ezi na-atụgharị pendulum, gụnyere n'ime mgbanaka na mpụta radial siwing na axial runout, Akụkụ nke ime mgbanaka na elu dayameta elu perpendicularity ndidi range.Bearing nkenke ọkwa si izugbe ọkwa. 0 ruo 6, 5, ọkwa 4 na ọkwa 2, n'aka nke ya, n'okpuru bụ ntụnyere tebụl n'etiti klas preeision nke china GB 307 na ọkọlọtọ ndị ọzọ nkenke. Giant bearing precision grade is from grade 6, 5, 4 and 2 level of four grades. 

Mgbanaka mpụta 11, mgbanaka ime 12, na bọọlụ 13 nke na-ebu ihe bụ 0.95 mass% ma ọ bụ karịa na 1.10 uka% ma ọ bụ obere carbon, 0.05 mass% ma ọ bụ karịa na ihe na-erughị 0.3 mass% silicon, 0.10 mass% ma ọ bụ karịa. na 0,50 uka% 11 A nke mpụta mgbanaka raceways na 12 A nke ime mgbanaka raceways nke bụ elu nke mejupụtara ígwè nke mejupụtara ndị na-esonụ manganese, 1.30 uka% ma ọ bụ karịa, na 2.00 uka% ma ọ bụ obere, na mejupụtara ígwè nke mejupụtara ígwè fọdụrụnụ na adịghị ọcha, yana kọntaktị na ihe ndị ọzọ.Na nkezi nitrogen ịta na n'elu oyi akwa mpaghara 11B, 12B, na 13B nke bụ mpaghara n'ime a omimi nke 20 μm si bọl Rolling elu 13A bụ 0.2% site uka ma ọ bụ karịa na 0.7% site uka ma ọ bụ obere, na n'elu. mpaghara oyi akwa 11B, 12B, 13B, 5 ma ọ bụ karịa carbides na dayameta nke 0.5 micrometer ma ọ bụ obere adị kwa 100 micrometer.