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Unread 01-03-2004, 00:49
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
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Join Date: Jul 2002
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Location: Glendale, CA
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Re: How hard is it to CNC this?

Quote:
Originally Posted by Random Dude
Hmm.. this looks an awful lot like the hubs for the skyway wheels, just with a hub & keyway attached...

If thats what there intended purpose is, why not just machine a plate to mount to the existing hubs?
It is very similar to the skyway wheels but it is actually for different wheels for a different project. They are just a plain bore through plastic, no pre-existing keyway. That's what these hubs are for. I had thought about a plate that clamps the wheel (http://chiefdelphi.com/forums/showthread.php?t=26215) but have determined that since I have the resources to do a full-blown CNCed hub, I will go with that. It is kind of dificult to explain but the center section of my wheel connecting the spokes to the hub is is very thin width, only .125 at the most. Putting just bolts through that thin of plastic will not be enough to drive the wheel reliably, so the two sides of the hub would have to clamp together to drive the wheel and I'm not so sure of that because in its application, it really cannot afford to slip no matter what. This design I have shown in this thread will fully engage the wheel and fills in all the voids in the hub area which makes it very strong. Basically with this, the plastic cannot flex anywhere because it would be running into aluminum, which is contacting the next section of plastic, and so on.

EDIT: I attatched a picture of the wheel's hub area. These void spaces are present on both sides of the wheel. One of these hubs will go on each side. The "thin plastic area" I talked about above is in these cutouts or void areas in the wheel. These cutouts have a bottom to them, and so do the ones on the other side. See, the whole wheel hub is about 2 inches thick and the cutouts are .95 deep on each side. That's why I want to fill up those spaces with the aluminum hub.
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Last edited by sanddrag : 01-03-2004 at 01:03.
 


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