Gluing cones

[jimbo7]

Any tips or tricks to gluing a separated cone back to the surround? And what kind of glue? It's a BP102 that I haven't used in at least a year (approximately 15yr old) but has been in stored in a climate controlled basement. Never done this before, so I wanna be prepared and do it right.

[Seth]

https://www.amazon.com/Pro-Grade-Heavy- ... B07FKXZ669

[jimbo7]

Ordered the black version. We'll see how it turns out next week.

[Grant Bunter]

It's not just a matter of adding glue and putting it back together.

To do it right, you need to carefully remove the dust cap to allow you to shim the voice coil (I use a no 11 scalpel blade for this).
Insert shims.
Reglue the surround, let it set.
Remove the shims, reglue the dust cap.
This keeps everything in alignment.
Final test is to move the cone in and out or up and down by hand. If you hear any rubbing, back to square one, start over.
Watch some you tube vids. Ignore any that don't shim the voice coil...

[Bill Fitzmaurice]

You don't necessarily have to remove the dust cap or shim the coil. So long as the spider attachment is good you can usually just re-glue the surround. If the driver has a very tight coil gap shimming is best, but the BP102 doesn't.

[Rich4349]

Any tips or tricks to gluing a separated cone back to the surround? And what kind of glue? It's a BP102 that I haven't used in at least a year (approximately 15yr old) but has been in stored in a climate controlled basement. Never done this before, so I wanna be prepared and do it right.

All of the (generic) re-coning kits on eBay come with a plain, no label bottle of white glue, which seems to be sufficient.

[jimbo7]

Ok people, the glue came in today and now I have the surround reattached to the cone. I watched some vids from Springfield Speaker and it was pretty straightforward. I got a little wild in some spots, but the most important thing is that it's not rubbing the voice coil. There was not much surface area where the two meet BTW. In 24-36hrs I'll be able to apply some volts and share my results.

[Tom Smit]

Cool. Good job. I have replaced 3(?) surrounds in the past, which was not to difficult.

[jimbo7]

It lives!

I did a quick test with a PA mixer and multimeter and it's back in business. The BP102 is in a Simplex 110 that was for sub duty in a car. Now I think I'm gonna add a tweet and crossovers and make it a full range grab-and-go box.

[Seth]

Nice! Great job Jimbo

[jimbo7]

So guess what just happened? No, it's not the BP102 I just glued back together. That's doing great. It's now a JBL GTO 804 that tore where the cone meets the surround. Problem is that the cone is plastic and the surround is rubber and the tear is right on the edge of the two. I don't see a good way to glue it back together like on a traditional paper cone driver. I've emailed Harmon-Kardon knowing the response will most likely be bad.

[Grant Bunter]

So guess what just happened? No, it's not the BP102 I just glued back together. That's doing great. It's now a JBL GTO 804 that tore where the cone meets the surround. Problem is that the cone is plastic and the surround is rubber and the tear is right on the edge of the two. I don't see a good way to glue it back together like on a traditional paper cone driver. I've emailed Harmon-Kardon knowing the response will most likely be bad.

Is the rest of the surround stuffed?
If not, nothing lost at all by trying to put a nickel sized dab of epoxy at the separation spot to see if that fixes it...

[Seth]

Pics. This thread needs pics!

[jimbo7]

Is the rest of the surround stuffed?
If not, nothing lost at all by trying to put a nickel sized dab of epoxy at the separation spot to see if that fixes it...

I thought about that but wouldn't the tear start to spread to other areas? I doubt the speaker glue would work in this case.

Here ya go Seth




I appears the rubber surround rolls under and is formed into the plastic cone. Maybe epoxy would be best applied there.

[Seth]

Inhaling through my teeth... I can only think of non traditional "creative" solutions for that situation. Are you leaning toward creative solutions or are you more likely to just replace the driver?