big roller chain sprocket 1.C1045 2.process bore/bore to size 3.high frequency on teeth 4.ISO standard ASA industrial chain wheel sprocket SpecificationSprocket processing: forging, machining, hobbing, treatment on quenching, surface treatment/rust-proof treatmentType: A/B series, simplex, duplex, triplexMaterial: Q235, Steel 1045, stainless steel, 40Cr, 20CrMnTi, 42CrMo, copper,etc.surface ...