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enter image description here

Is there a way to connect the two beams in this angle and still keep the connection strong and keep the rotation the same?

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    By the way, if you're after strong connections, I would also suggest replacing your grey Technic pins, which are frictionless, by black ones, which will lock the beams better into place. The difference might not be huge, but it may help.
    – Joubarc
    Commented Jul 3, 2013 at 14:31
  • @Joubarc Thanks! A really really good tip
    – bogen
    Commented Jul 3, 2013 at 14:33

2 Answers 2

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You probably could use this, which looks exactly like it's the missing part of your puzzle:

http://www.brickset.com/parts/?part=4296059

You'll be interested to know that this part has intitially been proposed by the first four fans (MUPs, for LEGO Mindstorms Users Panel) working on the very first NXT kit and regularly ran into the same problem as yours. A lot of Technic fans now name the part after Steve Hassenplug, as Brian Davis started called it "hassenpin", eventhough according to him it was more a collaborative effort. It's nice to see that LEGO does listen to the people it invites to workshops (the big wheels in the Emerald Night are another example of this).

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    Are we sure Steve Hassenplug didin't set up a dummy account to pose this question? :P
    – gev
    Commented Jul 2, 2013 at 1:29
  • @gev I really can confirm i'm not him, yes :-)
    – bogen
    Commented Jul 6, 2013 at 11:01
  • I guess we'll just have to trust you... I mean, what else is there? :)
    – gev
    Commented Jul 9, 2013 at 7:02
  • A fresh link for this part - peeron.com/inv/parts/55615. It's called "Pin connector perpendicular" in LDraw. Commented Jul 29, 2023 at 15:38
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enter image description here enter image description here

If you don't have any of the 90-degree pin connectors, here is another solution using more common parts. It does add to the profile, but is sturdy.

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