01-05-17, 11:39 PM
A couple of decent spots should be sufficient.
Coincidentally, I changed my sprocket this afternoon… angle grinder to cut the old welds and clean up the end of the shaft, new sprocket, old nut back on which tightened up just enough to clamp the sprocket firmly and a couple of fresh welds and it should all stay put.
Nice idea to build up the shaft and then cut a fresh thread, you could actually choose a pitch suitable for the job. I doubt it could be done in-situ though, that much welding would probably get the shaft hot enough to roast the oil seal.