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Unread 31-01-2013, 14:48
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VEX Robotics Engineer
AKA: Arthur Dutra IV; NERD #18
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
Location: Greenville, TX
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Re: Custom gearboxes

Be careful with 3D printed spacers to ensure they are only used as spacers and not a bearing/bushing surface. If any part of the 3D printed spacer acts as a bushing, it will melt and fail.

I have always been a fan of using using Delrin rod to make spacers, partially because it is low friction and partially because it machines very nicely. McMaster has both solid and hollow Delrin rod, so if you have access to a lathe, Delrin spacers are fast, cheap, and easy to make.
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Art Dutra IV
Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra

世上无难事,只怕有心人.