Fitting durability of electrolytically polished medium carbon steel gears -: Succeeding report©

The previous paper showed that electrolytic polishing of roughly ground teeth successfully extended the pitting durability of medium carbon steel gearing under severe loading and poor lubrication conditions, whereas smoothing the teeth had been supposed to have little effect on the pitting durability for such a material whose Brinell hardness is lower than 3000 (MPa). The effect is attributable to the tribological superiority peculiar to electrolytically polished steel surfaces. The present paper reveals its excellence in pitting durability definitely, comparing with the durability of finely ground teeth having almost the same surface roughness.