Can it be ground on a grinder instead of cut with a carbide cutter? ----- Original Message ----- From: "Bob Lee" <b...@flyboybob.com> To: "KRnet (E-mail)" <kr...@mylist.net> Sent: Sunday, September 17, 2006 7:26 AM Subject: KR> Good-news-bad-news
> Netheads, > > The good news it that after two years of not working on my KR (job changes > new business start-up blah blah blah) this weekend I took some acton. > When > I left off working on N52BL I was finishing up firewall forward so I could > take off the engine and finish up the boat. Specifically, this weekend I > was trying to finish up the alternator installation. I've got an > alternator > that will run out of the mag drive of my engine. I've gone with > electronic > ignition so the mag is no longer necessary. I had already machined the > alternator case to fit into the mag drive boss on the back of the engine. > This weekend's task was to machine the alternator drive pully so that I > could weld on a magnito puck drive from a bad magnito that I got on E-bay > for cheap. I had looked up an old KR buddy that built a KR in the late > 1980's that had a lathe that could do the machine work on the pully. > After > several weeks of clashing schedules we finally were able to get together > this weekend. > > The bad news is that I didn't accomplish much. I had ASSumed that the > pully > was mild steel which we could easily cut down on his lathe. As it turns > out > the pully is most likely a cast unit that is so hard it wore down a > carbide > cutting tool on the lathe. We didn't even take .001" off the pully > diameter. The alternator shaft is splined so I need to start with a pully > that has the correct spline to match the shaft. My wife was a good sport > about it, she took me to Jonnie's Pizza last night and bought me two > draught > Fosters. I cried in my bear and now I feel better. I've learned another > way NOT to make progress on the KR. > > We tried anealing it but that didn't do anything to soften it up. On > Monday > I'll make a trip to the Alternator Rebuild Shop and see if they can come > up > with a stamped steel pully that I can get the spline out of but if that > doesn't work I'll need to figure out how to make the one I've got softer. > > Does anyone know of a technique to soften cast steel so you can machine > it? > > Regards, > > Bob Lee > N52BL KR2 > Suwanee, GA > 91% done only 65% to go! > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
