[modeleng] Re: Saddle keys and etc.
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Thu, 14 Oct 2004 07:00:34 -0700 (PDT)
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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