Coupling Shaft is made by CNC machine and we can produce as per your sample or drawing. The material available: C45, brass, stainless steel, 20CrMnTi, 40Cr, 20Cr and so on. Different surface treatment is available, such as: blackening, white zinc coating and so on. Different heat treatment is available: quenching, case hardening, nitriding, tempering and so on.