
04-08-2016, 00:18
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Registered User
AKA: Thomas
 FRC #4159 (Cardinalbotics)
Team Role: CAD
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Join Date: May 2015
Rookie Year: 2014
Location: San Francisco, California, USA
Posts: 253
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Re: Custom Gearboxes
Quote:
Originally Posted by pwnageNick
One thing I do tend to do that is a little extra machining is a little trick for mounting a gearbox to a drive tube. Sometimes I'll take the standoffs that would be mounting the gearbox to the inside wall of the tube, and instead I turn part of the standoffs down on a lathe to .249" diameter. Then on my drive tube I put a .251" thru hole on both sides. What this does is allows the standoffs to slip fit through those holes in the tube, and you put your bolt into the end of the standoff on the outside face of the tube. What this does is mounts the gearbox to the tube by essentially trapping the standoff onto the tube. This is a stronger way to mount then traditional methods. You can bolt the standoffs directly to the inner face, but it technically isn't as strong and depending on the design it could be difficult to get the screws in the tube. You could run the bolt through both sides of the tube instead of inside the tube, but you then run the risk of crushing the tube some if over-tensioned.
That said, I wouldn't suggest doing this for most teams that have limited time or access for machining as its a relatively minor gain in strength and you have to spend some lathe time to do it.
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I'm not sure I understand what you mean. Do you have a picture of the setup?
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