I used a dividing head to make the centers for the workpiece ends. That was straightforward. That is, if you own a dividing head.climaxdk wrote: When I first read Kozo Hiraoka's first book (describing to build "The old Shay") I was impressed by the method of making the crankshaft. I just could not see, how I could place the three vital holes in each end of the workpiece with a suitable precision. The next book ("The new Shay") didn't help much.
I made the crankshaft mainly to see if it really was so easy - and it was - but I still have a part build Climax locomotive waiting to be finished before considering the Shay.
Svend Aage
Interesting that you are building a Climax, then a Shay. I made the Kozo Shay in a ten year period. I just got my Climax steaming after six years. It is much more of a Bob Reedy Climax than a Kozo, however.
As for how much time to make the crankshaft, like Jim I don't keep a log of the time spent on my hobby. However, I remember that it took 2 weeks of evenings to make the crankshaft. Say 2 to 3 hours times 14. I would guess that means 30 to 40 hours.
I am not a machinist. I did not work with any regard to the time spent on the crankshaft. I just wanted to get it done the best that I could without making a move with the tool that ruined the part. I was lucky, I succeeded on the first try.
I will mention again that most of the credit I give to Kozo Hiraoka for providing step by step directions on such a complex part that allowed me to make that crankshaft. Without his directions I would not have been successful. I would not have attempted it.
Harry: I suggest you take a good look at the Kozo Shay crankshaft drawings/instructions and I am sure you could apply the ideas to the crankshaft you wish to make.
-Larry