I designed a new cable guide, because i didn't like the design of most of them.
This one comes with a non-standard thread to really tighten it to your table.
The minimum clamping height is 47,50 mm,
maximum clamping height is round about 55 mm.
Inner hole diameter is big enough to get a standard STRAIGHT shock-proof plug (safety plug) through.
Outer diameter is 50 mm, so you will need to drill a hole through your table using a core hole drill/saw
When the thread does not fit at the beginning: Srew/unscrew a few times. With every process a little further. Use some oil (like silicone oil) when it is really tight.
Got problems or suggestions?
Tell me in the comments. I will help you with this, if I can. If you need a special type of this model, please ask and I will try my best to suit your needs with a new design! ;-)
Let me know if you made one!