Yes, you'll need steam oil and a displacement lubricator. I read somewhere that steam oil has a shelf life of 6 months but I have personally used mine that's older than that and it seem to run fine. You can buy small bottles of steam oil online or from local live steam clubs in your area.
Thanks for the input, I guess what confused me is the 20 degrees and the 9/64th throw. So do I offset it by 9/64ths? How do I offset it by 20 degrees ? Hope I explained it well enough.
I have partly machined the eccentric sheave for the Stuart Twin Launch steam engine and I am stumped as how to proceed. Enclosed a couple of pics. I machined the first part with an offset 4 jaw chuck. Thanks for any info.