25-12-2013, 00:34
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,721
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Re: Wheels..
Quote:
Originally Posted by sanddrag
This is exactly it: the desire to use standard R8-2RS bearings in our bearing blocks. Also, I should note that we use 7/16" hex on the sprocket side as well. While a live-tooled lathe would be nice, we get by with doing our hexes (and snap ring grooves) on a 3 axis CNC mill, with the axle standing vertical in a 5C collet holder. It works great. You could even mill hexes with a hexagonal 5C collet holder on a manual mill.
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Pardon the off topic question: If you're not going to step hex, why not step up to 5/8" round bearings? The bigger bearing is annoying but doesn't seem like it would utterly ruin a west coast drive, plus then you don't have to custom make every single drivetrain part.
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