Experimental 3D printing of a stainless steel steam engine.
In the engine case, the working cylinder and the spool are made as one part. The drive levers are printed with holes for the M2 and M2.5 threads.
Some parts of the levers are mated with a fairly tight fit.
All parts are printed on a 3D metal printer 3DLAM Mid2019 with stainless steel powder for 3D printing (PR-H15N5D4B by Polema).
Photo of the drive levers on the building plate immediately after 3D printing and after the assembly.