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

Also, my ET-1 (M-90) crank dosen't actually have machined "Main journals" per say, just a constant 8.0 mm OD flywheel Shaft extending from outer tip to crankshaft counterweight outer side junction.....The 0.060 mm "over" measurement is about equivalent to a normal bearing OD to cap
ID "Crush" interference fit of 0.002" to prevent a spun bearing effect...Unless your ET-1 came with an entirely new crank/Main bearing/Main cap design....