Any progress on the simple PSRU? I have a neighbor that is a
 retired  millwright, and he has a 12" metal lathe in his basement.
 He has been  building mini steam engines in his basement for a while-
  a steam powered  mini ferris wheel, locomotive, etc.

   Last I remember you were discussing using the ceramic bearings-
  and were  trying to get them from China. If I can get an idea of
 the internal parts  and where to get them, I can try to make one.

   Have we made any progress lately?

   Kevin Alderman

   It will be awhile. We had a ceramic bearing supplier picked out
 but there was some  evidence he was less than reliable. We are
 attempting to finding another source.

   Paul Lamar

  I assume the heart is a Ford planetary, but where does the splined shaft
  come from? Do we have to machine the splines on a shaft?

  Kevin Alderman

  It must be welded up from a  manual transmission, one inch diameter,
 input shaft or
  Ford auto tranny splined part. Tracy uses the auto tranny part.

  Paul Lamar

  OK, I guess I need to go get a used E4OD and tear it apart and see what's
 inside.
 Sounds like fun!

 Kevin Alderman

 No need. New parts are cheap.

 http://www.makcotransmissionparts.com/

 I have ordered from them and I think Tracy also buys from them.

 Here is an outfit on the west coast.
 http://www.slauson.com/

 We are in the process of ordering the bearings in china now.

 The smart thing to do is let us build one and see if it works first :)

 Paul Lamar
 \--------------------------------------------------

 You can order thin section steel bearings from mcmaster carr
 but steel thin section bearings are limited rpm wise.
 we are using the 4 inch size.

 This is why we are trying to buy ceramic thin section bearings.
 Cost is the reason for buying them in china.

 Paul Lamar


 I just noticed the NOTE:. The max RPM is with grease as a lubricant. High RPM
would heat the grease due to the internal friction in the viscous material.
How will lubricating with oil affect the RPM rating?

Dale Davies

Perhaps a bit higher but no way is steel going to live long enough with grease or oil.

Here is the specs on Shanghi Lilly thin section ceramic bearings.
The success of this design depends on the high rpm capability of ceramic bearings.

Paul Lamar

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