This update was a little unplanned, but i'm glad that it came up. So I was planning things out for the bottom of the build, I knew roughly the radiator would be on the right and the pump with or without a reservoir would sit infront of the PSU. Now in my mind perhaps the case was bigger or the D5 was smaller but whichever way I placed it made the tubing difficult or blocked wires going up to the top of the case.
After a while of moving things around, swapping D5 parts I realized the pump needed to sit tight to the rad, closely coupled barbs were quite hideous and still not that close. What I needed was a M-M extender, ideally 23mm and Aluminum, in the style of an EK fitting with the knurl removed. So.....
Yep, straight the Aluminum stock, turned down a ~35mm piece to 18mm. Then the end down further to 13mm.
Then a 1.5mm wide undercut to 11.5mm, otherwise it would be extremely difficult to achieve parallel threads later on.
And another small undercut to the back face so the o-ring is partially contained.
After marking the center of the face with another lathe tool I drilled half way through with a 9.5mm drill. On my first attempt I drilled all the way through but it moved off center very slightly which was concerning as there is only 1mm of material at the undercut so this time I drilled from both ends.
Stationary drill bits look amazing!
So all that was left on that end was to die the threads, 1/4" BSP using the chuck to keep it true and apply some gentle pressure.
Before cutting the part free from the bar I marked where the other face would be so I could see it inside the chuck.
Now it's time to work on the other end, the part is being held on the OD which was turned first. So to make another set of threads all the same steps as before, first reducing the diameter up to the mark.
With both undercuts complete the ID was drilled out and it starts to resemble a useful fitting.
1/4" threads added to the other end, cutting right up to the back face. The undercut lets the slightly tapered edge of the die pass beyond the end of the threads.
Lastly I screwed one end into a female fitting and while steadying the opposite end took a fine cut to remove the marks from where the OD was held.
The left hand side was my first attempt, the OD got badly messed up as it slipped a little bit in the chuck and because the hole went off center I couldn't steady it to clean it up neatly. Plus I took absolutely no photos making that so I kinda had to do it again anyway. Still, it makes the good one all the more awesome.
Perfect fitment, now I know that idea works I can get back to laying things out
JR