Where can I buy this wheel...or one like it?

[spiffyspleen]

http://www.google.com/imgres?imgurl=http://gcp.grabcad.com/screenshots/pics/521/medium.JPG%3F1292306712&imgrefurl=http://grabcad.com/cadfiles/mecanum-wheel&usg=__ufrLYBCWwwRN5ULV7h26OY-rjXU=&h=600&w=800&sz=42&hl=en&start=51&zoom=1&tbnid=0oPmY3C0aaEs9M:&tbnh=140&tbnw=207&ei=9BU1TZTAFIuCsQODq9X6BQ&prev=/images%3Fq%3DMecanum%2BWheel%26um%3D1%26hl%3Den%26 safe%3Dstrict%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-US: official%26biw%3D1280%26bih%3D619%26tbs%3Disch:10% 2C1662&um=1&itbs=1&iact=hc&vpx=980&vpy=137&dur=2460&hovh=194&hovw=259&tx=154&ty=100&oei=8BU1TcyMB4r2swPizp2-BQ&esq=4&page=4&ndsp=16&ved=1t:429,r:9,s:51&biw=1280&bih=619

:ahh:

[EricH]

AndyMark sells them. For the most part, they have outer hubs, but that shouldn't affect them.

http://www.andymark.com/SearchResults.asp?Cat=53

[spiffyspleen]

thanks for the help but this is no the same wheel style i was looking for...they don't sell the one in the image @ Andy marks :(

[Vikesrock]

thanks for the help but this is no the same wheel style i was looking for...they don't sell the one in the image @ Andy marks :(

What qualities does the wheel you linked have that the AndyMark mecanum wheels Eric linked to do not? The Andymark wheels are designed a bit differently with a single roller supported by plates on both ends instead of a two piece roller supported in the middle, but is there a specific reason this would affect your design?

[Tytus Gerrish]

I'm affraid you will have to machine it yourself. and mold the rollers yourself and assemble it yourself. sorry

[techedguy]

Yeah, we were talking with AndyMark about producing our wheels from last year with them, but we didn't really follow up after Atlanta. Not an easy process, but for the students it is a manufacturing process that many engineering students aren't exposed to in college programs. This took weeks of our build season. Using the address below, click on the Mecanum Wheels folder.

http://roboteknix.com/gallery/

End result: http://upload.wikimedia.org/wikipedia/commons/a/af/MG_6646.resize.jpg

There are pictures of the process, we haven't written up a process guide. We used Smooth-On urethane products and the customer support was terrific helping us through the process.

Best of luck!

[craigboez]

That is awesome. I'm going to put all those pictures together as a powerpoint and show my team.

I'm not too familiar with the process, but from the pictures the progression was pretty easy to follow:
1. Machine a "master" part
2. Make wax copies of it
3. Use silicone to make a mold of that part
4. Pour polyurethane into the mold and get your wheels

Is that correct. Also, what were the binder clips for?

[Tytus Gerrish]

[quote=techedguy;1002554]
http://roboteknix.com/gallery/
http://upload.wikimedia.org/wikipedia/commons/a/af/MG_6646.resize.jpg
quote]

Most Impressive

[techedguy]

The binder clips held the wax models down while the mold cured. They wanted to float.

Thanks.

You've got the steps pretty well down. With the wax models be careful about temperature...we were really hot, which added air bubbles into the wax...and they took forever to cool off even with ice and a deep freezer handy.