Correct weld for hardened steel
Correct weld for hardened steel
(OP)
Have a hardened steel hollow shaft off an electric motor. Apparently it may be chromed on the outer surface. I want to extend a shaft from the original. I dont want to press it in, as it may expand the original outter race where the rolling bearing sits. Once placing the new shaft inside, i would like to run a weld around to hold the shafts in place. There is a double pulley load going to be placed on the new shaft, so a strong weld is required. Are there any suggestions, and/or what particular weld am i looking at?





RE: Correct weld for hardened steel
Blacksmith
RE: Correct weld for hardened steel
RE: Correct weld for hardened steel
RE: Correct weld for hardened steel
How about drill and tap in the bottom of the hollow shaft (assuming a blind hole and soft core) and using a stud to attach the added shaft?
RE: Correct weld for hardened steel
RE: Correct weld for hardened steel
What you propose is a bad situation as there is going to be movement between the two shafts unless you can get a good/high interference fit. Even if you could correct the run-out of the two combined and welded it appears that there is going to be large load on the shaft as you move away from the bearing, this too is good as you have a metallurgical as well as a mechanical notch. One or the other or both are going to cause the shaft to fail by fatigue.
RE: Correct weld for hardened steel