Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Disclaimer:

I Do want to point out that pure copper is Not a traditional oil cup material. It is sometimes added to jewelry like gold rings to change the "color"...this is how we get "Rose Gold" however "pure" copper is not super benefical in the durability dept, it is a bit like chucking up a wet noodle in my lathe! (slight exaggeration) but really soft, the the ring makers add in Silver to give the ring much needed stiffness and durability. I am going out of my way to add some copper color to my engine (because I CAN, not because I should) and in this tiny scale the copper will be just fine in its task as a vessel that holds 1 to 2 drops of oil.
  I suspect Bronze and brass would be most correct for oil cups...You now have been Cautioned!
  We now return to our regularly scedualed programing...