Re: Buying or CNCing some odd angle bevel gears. I'm stuck !!

Tom,

Have you already tried Small Parts Inc. ? Next place would be the
online thomas register listings.

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "kaynrc" <tom.kay@n...> wrote:
> Hi guys. I was going to just ask where I might find some 22.5
degree
> bevel gears, so that the shafts would intersect at 45 degrees, not
> the usual 90. I would by FAR prefer to buy them, but, this is a Cad-
> Cam group, so I'll also ask what you'd do if they can't be found.
IE:
> Make them with a 3 or 4 axis cnc mill?
>
> Here's the application: I'm doing a little 1/4 scale Merlin, and
> there's a vertical shaft in the back of the engine, in the
wheelcase
> to be exact, and this drives a few items. The top of this shaft has
a
> gear which drives 2 other gears on the end of their own shafts.
These
> second shafts travel up to the rear end of the cylinder heads to
> drive the camshafts.
>
> If that sounds confusing I'll paint the simplest picture possible.
> The bottom shaft is like the bottom of a letter "Y" and the upper
> shafts, like the top part of a "y", are driven by it. The gears, of
> course, are in the middle of this acting as "glue" between the 3
> shafts. The top two shafts seem to be 90 degrees to each other, so
45
> degrees to the vertical driving shaft.
>
> The gears will have to be small, something like 5/8ths to 7/8ths
OD,
> so these are not easy to find items. The driving gear is smaller
than
> the 2 driven gears, and I will get around to counting the teeth on
> the Merlin wheelcase that I have in my basement. Can anyone suggest
> any possible source for these odd angle small bevel gears ???
>
> Ok, in keeping with the whole reason for the group, let's say I
have
> to make them, and that within a reasonable time I'll have 3 or 4
axes
> of cnc power at my disposal. I'm still finishing up Dan Mauch's 5
amp
> drivers, but they are essentially ready to go. Does anyone have
> software/methods/ideas on how to cut bevel gears that are designed
to
> intersect at 45 degrees, not the standard 90?
>
> Thanks as always, Tom Kay, Ottawa Canuckville.