The material of our bicycle bearings A. inner & outer rings: chrome steel 100 Cr6 (SUJ-2/52100); stainless steel AISI 440C; carbon steel B. steel balls: chrome steel 100 Cr6 (SUJ-2/52100); stainless steel AISI 440C; ceramic Si3N4; carbon steel C. cages: 08F carbon steel; PA6/PA66; full complement D. sealing: SPCC steel (metal shields); NBR (rubber seals),sealing mode:light contact or heavy contact for different requirements. Accuracy: P0(ABEC-1);P6(ABEC-3); P5(ABEC-5). we mainly produce P0 grade, but we also supply bearings of P6 and P5 grade on several types ID 5mm -50mm.
