Hi Bob:
This can very well be done on a finger joint fixture
(sliding table for making box joints). The cutter can
be a simple D bit ground from solid carbide if you go
slow. Shoot some compressed air at the cutter to cool
it or it will overheat shure as can be. Remember, at
the bottom of the gullet the cutter is quite small and
cannot take much heat. A better idea would be to use a
real milling machine with a multiple tooth gear cutter
($50 or so).
As to easy to make involute gear forms, I am game, how
is that done? I have been making cutters for 20 years
and have yet to see an easy way to make them.
Barry
--- Robert Mueller <[EMAIL PROTECTED]> wrote:
> Would it not be easier to mill the teeth (router)
> with a shaped cutter and
> just some device to advance the cutter by one tooth
> spacing after each row
> of cuts. Making cutters should be quite easy. The
> rack can have straight
> sided teeth and it is not hard to make an involute
> cutter for the
> gear. Metal workers have all the details worked
> out.
>
> Bob
>
>
>
> At 21:47 24.10.01 -0600, you wrote:
> >I was wondering in anyone would be interested in a
> template/jig to be able
> >to shape and cut a rack and pinion out of wood.
> I'm working with a
> >engineer with a good CNC metal shop to build a jig
> system for cutting the
> >pinion and rack by hand using files and chisels. I
> think African
> >Blackwood, Cocobolo, Hard Maple or other hard
> stable woods would be great
> >for gearing since there isn't a lot of pressure on
> the gear teeth. The
> >design we are working is based on hardened steel
> runners in which you
> >would place the piece of wood in between two jigs,
> clamp the wood tight,
> >drill the center hole using a predrilled hole in
> the steel that would
> >guide the bit straight, and then cut and file each
> tooth. The rack will
> >be a similar design but won't need the center hole.
> >
> >Now, I'm going to build one for myself since I like
> having rack and pinion
> >focusing on my cameras and a wood system is so much
> cooler than adding
> >metal to the system. My friend (Kirk Kovel of
> Kovel Precision Machine in
> >Colorado Springs) can build the system cheaper in
> production than one at a
> >time so if others want this type of system we can
> all benefit from a
> >cheaper price. He is also great since he knows
> that this is just a hobby
> >and none of us are out to make money doing this so
> he charges a reasonable
> >price. I have no idea at this time what the cost
> per unit would be since
> >more units will bring down the price, but the price
> would be at cost.
> >
> >My current camera is using a 16 tooth system and is
> quite stable with no
> >stress on the gear teeth. I think a 32 or even a
> 64 tooth system would be
> >quite reasonable and workable but I want to see
> what any other interested
> >parties would like. The other size requirements we
> need to work out
> >amongst ourselves is the size of the pinion and the
> length of the
> >rack. My current system has the pinion at a 2"
> diameter and the rack at
> >16" long and that seems to work well.
> >
> >Alright, let's see if anyone is interested and
> we'll work out the details
> >and see if anyone has good ideas to make this
> system work.
> >
> >Dan Rhoades
>
><http://www.rhoadescameras.bizland.com>www.rhoadescameras.bizland.com
>
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