BeoLab 8000: Broken plastic leg supporting PCB > which glue ?

[KolfMAKER]

The older series of BeoLab 8000 (09xx, 10xx) have plastic legs supporting the PCB, that have become brittle overtime. And sometimes easily break apart when working on the screws that hold the PCB to these legs. See picture.

I have tried to glue the broken part back using super glue. But it does not work well, the glue does not keep the parts together well. So I am looking for glue that works better.

Question

What glue works best for this purpose, with tis kind of plastic?

[Beobuddy]

Glueing will not work. The first screw that enters, will break it again.

Reproducing these:

 

Or at the PSU side:

 

[Glitch]

The 3D printed part is a great solution!

If you still want to try repairing the old part, a stronger glue, added reinforcements, or a combination of both might work. Below are a couple (of many ways) to do this.

In the first picture. The outside of the post is roughed up so a mechanical bond with the glue can be made. My favorite glue for this type of repair is original JB Weld. In this repair the epoxy itself provides all of the strength.

In the second picture, metal pins are heated and pushed into the plastic. The melted plastic holds the pins in place and the metal provides the strength.  Another option could be to glue a thin walled metal tube over the post.

For any repair, be sure that you clean out any material that may have gotten into the screw hole. Lubricating the screw can also reduce the stress on the repaired part.

None of these options will look as good as the 3D printed part, but once the speaker is reassembled nobody but you will know.

Glitch

[Beobuddy]

My experience with glueing the parts together with supports around etc is, that the plastic is so brittle and it easily breaks again at another place along the pillar.

To prevent breaking I always start to search for the thread and use some grease or just wetting the screw to carefully turn the screw with the minimal amount of force back in its place.

[KolfMAKER]

Thanks BeoBuddy !

I agree on the ‘brittleness’. The material all over is quite vulnerable after all these years. After it happened with one screw, I put just a bit of WD40 in the other screw holes. Keeping the screw vertical and screwing slowly works quite well. Anyhow, if one screws slowly without too much of resistance, it works well.

For all other cases, it is indeed better to create new brackets/stands. I think I might also do this on my 3D printer.

===

By the way, did you see my PM to you?

 

[Author]

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