Quote:
Originally Posted by AdamHeard
We use a 2.5mm end mill for the teeth. (after roughing with larger end mills as described above).
We've run the hex both ways. Round then broach, or milled on the machine with the corners drilled out.
Let me know if you need more information.
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Do you have any techniques for doing this well? We had a bad experience with really small tools (1/8" end mill for hex, 1/16" drill for corner point holes) in steel. We were feeding at under 1 IPM for most of it yet we managed to still break bits. I'm guessing it's quite a bit easier to do this in aluminum.
Also, would you recommend purchasing a hex broach? We don't have one, and we've recently ended up buying a bunch of gears/pulleys/sprockets that we could likely broach ourselves.
Quote:
Originally Posted by sanddrag
For those of you making your own pulleys, what CAD files are you using?
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We've 3D printed with vex pro, B&B manufacturing for gates profiles (
http://www.bbman.com/catalog/category/timing_pulley) and SDP-SI.