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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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