Recent content by McSummation

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  1. McSummation

    First Boiler info

    I'm working on a series of kits. The boiler I built is https://www.pmmodelengines.com/shop/steam/steam-boiler-kit-1/ It is currently hooked up to their #3 engine. I've got a #5 under construction right now.
  2. McSummation

    PM Research #5 "coke bottle" steam engine

    Time for some "Help!" I'm working on the crankshaft. The casting is so rough that I smoothed it some on my bench grinder. Then, using a steady rest, I used my tool post grinder to grind a round section at the ends. After moving the steady rest to the ground area, I tried to use a center...
  3. McSummation

    PM Research #5 "coke bottle" steam engine

    One thing I had been dreading was the "notch" in the valve guides. I finally bought a 90 degree carbide tipped router bit, which made that part of the machining easy.
  4. McSummation

    PM Research #5 "coke bottle" steam engine

    Since it's gotten hot here in north central Texas, I've been spending time during the day working on another project - StevensAero SE5.a model airplane - http://www.stevensaero.com/product/se5a-um/ I got the pulley and flywheel done. I did the pulley first and then had to make a longer mandrel...
  5. McSummation

    PM Research #5 "coke bottle" steam engine

    Work has gotten in the way of machining much. I've done the small threaded rods and some nuts. I've also been experimenting on how to machine the head that the piston rod goes through. Almost ready to tackle it. I did get the valve done. The "bobble" in the corner of the underside...
  6. McSummation

    PM Research #5 "coke bottle" steam engine

    Thanks for the explanation and very clear pictures. My crankshaft already has a spacer in the throw. P1050547 by McSummation posted May 27, 2018 at 3:04 AM According to my "cutting plan", it's several days until I'll do the crankshaft. I'll post my results when I get it done.
  7. P1050546

    P1050546

    Steam chest cover
  8. P1050547

    P1050547

    Crankshaft
  9. McSummation

    PM Research #5 "coke bottle" steam engine

    The piston specifies a 9/32" counterbore. Since a nut is going to sit on the bottom, it needs to be flat. I don't have a 9/32" end mill and my boring bar won't go into a small hole like that. So, I mounted my 1/4" end mill in a boring bar quick change, bored the correct depth, then moved the...
  10. P1050544c

    P1050544c

    Using end mill like a boring bar
  11. P1050545c

    P1050545c

    Completed piston
  12. McSummation

    PM Research #5 "coke bottle" steam engine

    How did you do the crankshaft?
  13. McSummation

    PM Research #5 "coke bottle" steam engine

    Got the Crank Bearing Caps drilled this morning. They were on the same casting with the Valve Chest Cover and Head: P1050541 by McSummation posted May 23, 2018 at 4:41 PM After much fussing around trying to hold the pieces such that I would not drill my vise, also: P1050542 by McSummation...
  14. P1050541

    P1050541

    Casting holding Crank Bearing Caps, Valve Chest Cover, and Head
  15. P1050542

    P1050542

    Crank Bearing Caps after drilling.
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