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| Shay Locomotive |
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| doubleboost:
Hi Dan This is going to be some build :drool: :drool: :drool: Rob More pictures please :drool: :drool: :drool: John (DAFT TWAT) :D |
| krv3000:
hi yep looking fowerd to the bild |
| Dan Rowe:
Thanks for the coments, Rob that looks like Kozo's first Shay which is where I started dreaming this project up. The Lima drawings that survived include some of the tools so I had to make some of the jacks that would have been included in the tool box for this Shay. Here is the drawing of the smallest of the Lima jacks I have even seen a photo of one of these in use. I used a 10-32 hex head socket screw to make a set of 4 jacks in 7/8" scale. The big one is one of the projects I made in shop class in college. The channel section was cut and drilled for the angle brackets. The ends are filed to fit the I beam profile. I am making both the Shays that went to the Mapleton Tramway. They were mainly the same built to the same plan but with some slight changes to the frame and a few other accessories like the boiler. The frame center plates proved very difficult to cast and as they are a fairly simple part that is easy to machine from solid I made the second set from solid. I had a handy chunk of brass hex so the first step was to use the lathe for a center hole then over to the mill and the 5C indexer is used to rough out the shape. Back to the lathe for the round sections and parting off. Now to drill the cross holes. Here is more scale stock made from hot rolled stock. I carefully kept the mill scale finish where it will show. Here is a clamp and jig to drill the corner brackets. Now both sets of cross members assembled. Dan |
| tomfilery:
Dan, I admired your beautiful work on HMEM previously. In this thread I'm intrigued by your "rivet practice" post. Are you able to tell us a little more about the tools you are using to form those very nice heads (and in only two operations, if I read correctly)? Kindest Regards Tom |
| Dan Rowe:
Tom, thanks for the interest. I read up on rivets and the closest model solution I could come up with was to find a ball end mill twice the body size. This should really be 1.75 times the body but I did not want to make my own cutters. The first die I used a center cutting end mill the size of of the rivet body. The depth of the cut was the body diameter. I then used a small counter bore or a spot drill to machine the cone on the end of the die. The bucker and the final die are made with the ball mill to match the factory head as close as possible. I used tool steel and did not bother to harden it and looking at the photo of the one I did today, I think I should recut the dies and harden them. Dan |
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