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Unread 06-02-2017, 12:50
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Jimmy Nichols Jimmy Nichols is offline
Mentor,QCR Planning
FRC #1038 (The Thunderhawks)
Team Role: Mentor
 
Join Date: Feb 2005
Rookie Year: 2004
Location: Cincinnati, Ohio
Posts: 1,036
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Re: Thunderhex and Thunderhex Bearings

Quote:
Originally Posted by BumblingBuilder View Post
Andymark offers 7075 hex shaft that our team now uses for drivetrain axles (but works for anything else). If anything, however, this shaft is a little too thin. There's a small degree of play in our wheels that are mounted on it, but we haven't noticed a loss in performance as a result.
It could even just be our wheels too. I've been too busy with other parts of the robot to address the seemingly trivial problem that is axle size. We're just happy we didn't need to slice of faces of the shaft on a mill this year

We also get hex shaft from a local metals warehouse, Discount Steel. They may or may not ship to your area... but if you have a local metals warehouse I'd imagine they would have hex shaft. If you do have a shop nearby bring hex bearings and test them on the shafts before you buy them
We bought hex shaft from McMaster-Carr last year and the tolerances were horrible the hex bearings wouldn't fit at all and we machined and/or sanded the surfaces. We switched to Thunderhex and decided to use it again this year. We Metal Supermarkets locally, but I haven't tried to source any hex from them before. May try that in the off-season to see what kind of pricing we can get.

Thanks!
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Jimmy - Lead Mentor, Pit Boss, Miami Valley FRC Regional Planning Committee
Lakota Robotics - FRC Team 1038

2013 - Crossroads Team Spirit,Quarter-Finalists - Queen City WFFA - Paul George,Quarter-Finalists - Ohio FRC State Championship Champions
2012 - Queen City Volunteer of the Year,Team Spirit,Finalists - Smoky Mountains Engineering Inspiration,Quarterfinalists
2011 - Pittsburgh Semifinalists - Buckeye Engineering Excellence Award,Coopertition Award,SemiFinalists
2010 - Pittsburgh Judge’s Award,Quarterfinalists - Buckeye Industrial Design Award,Finalists - IRI Mentor Round Champions
2009 - Buckeye GM Industrial Design,Champions
2008 - Midwest Engineering Inspiration,Quarterfinalist - IRI Semifinalist
2007 - Pittsburgh Motorola Quality,Finalist - Buckeye Rockwell Automation Innovative Controls,Finalist - Championship Newton Quarterfinalist
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