Flexible Coolant Pipe Adapters

by Esquilo Sep 5, 2016
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Just my luck I only found this after printing like 4 batches of ball links. Thanks for including the adapters (and the .scad files)

Wouldn't heat from the soldering iron on the wire it is holding melt the plastic?

Hi Esquilo,
some people had trouble with the thread diameter of the base socket in conjunction with coolant pipes from eBay or AliExpress.
Same for mine from AliExpress. Just to let you know: I made a quick remix of the base socket with adjusted parameters. Now 1/2" coolant pipes from the above mentioned sources should fit.

After a few test prints and some measurements, I wanted to share that I think the threading you have for the Base Socket is wrong. I believe they are 1/4" threaded pipe (which doesn't mean either the internal or external are 1/4" FWIW). Most of the pipe I've found online (Amazon, Ebay, etc.) advertise the threading at 1/4" PT (pipe thread) but don't indicate which kind.

I was able to get a very nice matching print using BSP G1/4-19 as the threading, but it may be an MPT 1/4" thread instead.

BSP: https://en.wikipedia.org/wiki/British_Standard_Pipe
NPT/MPT: https://en.wikipedia.org/wiki/National_pipe_thread


My pipes have the same thread end as yours and they also didn't screw into the 3d printed adapter correctly. Do you have the file for the modified adapter you made?

The coolant pipes I have are definitely threaded 1/2-20. The STL was generated with that thread size and I used a Hanson 1/2-20 NF tap to clean them up. The pipes screw in perfectly to the base sockets.

Great addition to the PCB Workstation, http://www.thingiverse.com/thing:801279 I found the same problem with the damn balls, they take too long to print, and then they get loose too fast!
I thought on doing exactly the same as you, but you saved me the try and test phase.

PCB Workstation with Articulated Arms
by giufini