>> Giffen Marr wrote:
     >>> Paul
     >>>
     >>> Am I to understand that the TC Drive is to be driven by a  shaft
    from the
     >>> Turbo compressor? If so, aren't shaft rotational speeds of  60k
    to 80k
     >>> going
     >>> to present a problem?
     >>>
     >>> Giff Marr
     >>> LIV-P/20B 45%
     >>>
     >>>
     >>
     >> What problems did you have in mind? This is what I think I  am going
     >> to use in the 1/2 inch size.
     >>
     >
     > Paul, you are joking right?
     > Mark W.
     >
     > Opss I forgot to attach it.
     >
     > --
     > Paul Lamar ...No rotor no motor.

    Hi Paul,
    It was attached the first time.

    You don't seriously think you can attach two shafts rotating at  80K with
    this do you?
    Mark W.


    Why not?
    --
    Paul Lamar ...No rotor no motor.


Balance specs?


Matt-

I don't really know Matt. I'll buy a few and measure the
run out. If greater than what we think we can make we will
make some. However the moment inertia of this shaft is so
much less than the moment of inertia of the compressor rotor
I can't see at this time how it can cause a problem. I could
be way wrong. The input shaft to the gearbox could not be
better supported or more rigid being sandwiched between three
much larger steel rollers at high pressure.


One end of the proposed steel u-joint would be machined to act
as the nut on the compressor end of the turbo charger shaft.

The torque is 3 to 5 foot pounds
so the OD of the connecting portion is larger than necessary
and we may grind it down 3/8" OD to further reduce its
moment of inertia and weight.

I also thought about a flex coupling made from a short
section of 1/2 inch ID Teflon lined SS braided hose and
some sort of clamps. So far I have not come up with a good
clamp that would be balanced on its axis.

Here is an interesting paper on the whirl mode of turbocharger
shafts.

Paul Lamar ...No rotor no motor.