C
chiliviking
Guest
I have received my plans for the walking beam engine from A-1 Machining and have been studying them for a couple days and am not sure what to think. It seems that some of the dimensions are generated by some CAD program rather than practical thinking. Just a couple examples the profile on the outside of the beam is described 14.783 degrees.(like 15 degrees would just be too much and 14.75 would'nt be enough). The radius for a notch on the cylinder head to clear the valve actuating rod is called out as .100 which means you would have to use a .200 endmill which is not availble from any common source. Why not dimension the radius of the notch at .093 so a 3/16 endmill could be used or .109 using a 7/32 .
I realize that these are not major issues that can't be overidden with a little common sense but it brings me to the conclusion that this is a project that you wouldn't trust any of the dimensions on the print without considerable study of how each part interacts with the other parts. All projects require this to some extent however I also have built projects that could be completed without any deviations from the prints. Also it seems there may be some parts missing from the assy. drawing ( which is provided in a 00 font size if there is such a thing. How you are expected to read something so small is beyond me.)
I would really appreciate input from others that have had an opportunity to look at these prints. It looks like a great project but may require some serious rework to sucessfully complete. I also have some questions about the selection of materials called out but I'm surely not very qualified in that respect.
I realize that these are not major issues that can't be overidden with a little common sense but it brings me to the conclusion that this is a project that you wouldn't trust any of the dimensions on the print without considerable study of how each part interacts with the other parts. All projects require this to some extent however I also have built projects that could be completed without any deviations from the prints. Also it seems there may be some parts missing from the assy. drawing ( which is provided in a 00 font size if there is such a thing. How you are expected to read something so small is beyond me.)
I would really appreciate input from others that have had an opportunity to look at these prints. It looks like a great project but may require some serious rework to sucessfully complete. I also have some questions about the selection of materials called out but I'm surely not very qualified in that respect.