Hi. its been a while, I am glad you are still here. Anyway, I am stripping down an Ideal Model R 1.5 hp engine, my question is the roller bearings, I have never seen rollers quite like these, they have shoulders inboard, (i did read this was for reducing side play). I havent pressed them off the crank yet but I dont see any numbers anywhere. Does anyone know what these are and if there is a modern cross reference? Thank you.