... for the shaft.2.With technicians around,well-trained operators follow the working plan work on each procedure. Use Digital control ... like metallographic analysis. 4.After FQC,we pack goods carefully. Shaft DetailsMaterial:carbon steel,stainless steel,copper, beryllium copper, brass, ... Ra : 0.8mm I.D. 0.25mmShaft---motor shaft,steel shaft,metal shaft Basic process:1.the shafts are made by customized ...