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Unread 21-08-2012, 11:33
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Simplicity by Design...
AKA: Tim Miedzinski
FRC #0836 (The RoboBees)
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Re: Internal Threads

Bar,

Used properly, they are great.

Internal threads can be misleading. What are you applications are thinking about converting? What fabrication methods/material types do you currently use?

Yes, these can appear to save weight. However, inorder to get the same strength and results as a nut would provide, you often have to increase the metal thickness. These also don't provide sufficient locking features, but you can insert locking heli-coils to solve this (as well as a few other methods).

I don't want to discourage from this, but know that it is hard to tap (method of creating internal threads) a 1/4"-20 hole into a piece of 1/8" material.

There are some other "lightweight" alternatives out there.
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