[modeleng] Re: Saddle keys and etc.
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Tue, 19 Oct 2004 09:10:50 -0700 (PDT)
That is what concerns me as it is a rather heavy
flywheel mounted on a 1/2" dia. shaft.
Al Messer
--- Ronald <Ron@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Do you mean torque would shear the key or screw ??
> (due to the inertia or
> kinetic energy of the system )
> ----- Original Message -----
> From: "Allen Messer" <al_messer@xxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Monday, October 18, 2004 12:19 AM
> Subject: [modeleng] Re: Saddle keys and etc.
>
>
> Starting and stopping. The cylinder measures 1-5/8"
> bore by 3" stroke and probably will exhibit a lot of
> "Umph".
>
> Al Messer
> --- Ronald <Ron@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> > I cannot see how centrifugal force comes into the
> > system , could you explain
> > ??
> > ----- Original Message -----
> > From: "Allen Messer" <al_messer@xxxxxxxxx>
> > To: <modeleng@xxxxxxxxxxxxx>
> > Sent: Thursday, October 14, 2004 3:00 PM
> > Subject: [modeleng] Re: Saddle keys and etc.
> >
> >
> > You are correct. My concern is would only one
> screw
> > present enough surface to keep centrifugal force
> > from
> > shearing it in two?
> >
> > Al Messer
> > --- alanjstepney
> > <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > wrote:
> >
> > > Wilfreid, I think Allen meant the key to go in
> to
> > > the face of the
> > > wheel/axle, and not through the wheel into the
> > axle.
> > >
> > > I reckon that procedure, screw half-and-half, is
> > OK
> > > as it has been used for
> > > many years without problems.
> > > alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > >
> > > www.alanstepney.info
> > > Model Engineering, Steam Engine, and Railway
> > > technical pages.
> > >
> > > ----- Original Message -----
> > > From: "Wilfried Vermeiren"
> > > <vermeiren.wilfried@xxxxxxxxx>
> > > To: <modeleng@xxxxxxxxxxxxx>
> > > Sent: Wednesday, October 13, 2004 8:13 PM
> > > Subject: [modeleng] Re: Saddle keys and etc.
> > >
> > >
> > >
> > >
> > > -----------
> > > Also, as to "round keys", would two 5-40 (5 BA)
> > > screws
> > > installed 180 degrees apart be proper for a 1/2"
> > > shaft
> > > with half the hole in the wheel and half in the
> > > shaft?
> > > -----------
> > > Just an opinion but I think this is asking for
> > some
> > > wobble afterwards.=20
> > > I was always told NEVER to fix a pulley,
> handwheel
> > > or whatever to a =
> > > shaft
> > > using one or two opposite positioned setscrews
> but
> > > instead to place =
> > > always
> > > two at 120=B0. The reason is that the direction
> of
> > > the pull is on the =
> > > opposite
> > > side from them nicely in-between the remaining
> > > 240=B0. Giving a sort of
> > > fixture equal to the tree legged milk chair.
> > > Since you fix the two screws in-between the axle
> > and
> > > the wheel and =
> > > probably
> > > in doing so put some stress, drilling and
> tapping,
> > > in that place I would
> > > rather like to seen then at 120=B0
> > > Don=92t know off hand the size of 5 Ba but one
> > looks
> > > sufficient for a =
> > > 12.7mm
> > > axle.=20
> > > Regards
> > > Wilfried Vermeiren
> > > http://users.skynet.be/modelbouw.wilfried=20
> > > updated.
> > >
> > >
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> >
> >
> >
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