gluing a plastic lug thing, what to use

Post by **formula400** » Wed Mar 17, 2021 2:33 pm

So whilst doing some bits I've managed to brake this lug off , what's the best way to glue it/fix it back on that's nice and strong???

cheers

Post by **Rockburner** » Wed Mar 17, 2021 2:37 pm

Is it plasti-weldable?

Post by **formula400** » Wed Mar 17, 2021 2:37 pm

Rockburner wrote: ↑Wed Mar 17, 2021 2:37 pm Is it plasti-weldable?

I don't even know what that means

Post by **formula400** » Wed Mar 17, 2021 2:39 pm

is that it???

Le_Fromage_Grande · Post by **Le_Fromage_Grande** » Wed Mar 17, 2021 3:25 pm

IME once those kind of lugs break, they're broken, the stress of pulling them in and out of the rubber will break any repair

Post by **formula400** » Wed Mar 17, 2021 3:35 pm

£57 for a new one seems good value then

Le_Fromage_Grande · Post by **Le_Fromage_Grande** » Wed Mar 17, 2021 3:37 pm

formula400 wrote: ↑Wed Mar 17, 2021 3:35 pm £57 for a new one seems good value then

Yes, very good

Post by **Mussels** » Wed Mar 17, 2021 3:39 pm

I wouldn't trust trying to stick that, even with plastic weld. I think I'd bend a bit of metal to go right over and stick to the plastic either side. Then tap a hole (or drill it and use the existing clip) and it should be plenty strong enough.
The problem I see with that is the panel could be a couple of mm proud when I goes back on, some more careful forming of the metal will help with that.

Asian Boss · Post by **Asian Boss** » Wed Mar 17, 2021 3:44 pm

Plastic welding is melting it back together with a hot thing like a soldering iron. I think you can get it professionally done.

Like LFG I think it's difficult to ever make a good repair. The most successful I ever managed involved drilling and wiring it together in several areas then covering with an epoxy putty. I was always careful with that panel after that and a good yank would have fucked it I suspect. Plastic welding is probably the most durable.

Post by **formula400** » Wed Mar 17, 2021 5:23 pm

Right cheers you lot, seems like a lot of sodding around that might not even work.

New one it is.

David · Post by **David** » Thu Mar 18, 2021 10:39 am

Screwdriver had a weldy thing that heated a wire clip into the plastic for support..I suspect they were a bit spendy.

Post by **Mr. Dazzle** » Thu Mar 18, 2021 12:57 pm

Thermoplastics, I.e. the sort of heat formed/injection moulded stuff you're looking at here, are notoriously hard to bond to...even with brand new materials going through all sorts of fancy surface treatments they're not great. So you're always gonna struggle with a used bike bit and DIY

iansoady · Post by **iansoady** » Thu Mar 18, 2021 1:39 pm

I've had success with superglue and - wait for it - baking soda. Stick the parts with superglue. When set, make a leayer of superglue over the area and sprinkle with the baking soda while still liquid. It will set into a hard substance which is surprisingly strong. You can go on to add more layers.

I used this technique for the lugs on a Triumph Tiger side cover and it lasted well.

Post by **Ditchfinder** » Thu Mar 18, 2021 1:54 pm

Fixed a broken lug using a soldering iron and melting zip ties into the areas that needed toughening up. Lasted fine, was as strong as before. Watched a couple of tutorials on YT then practised on a bit of scrap first.

Post by **Druid** » Thu Mar 18, 2021 7:22 pm

I've had good results using Plastex

https://www.plastex.net

dayglo jim · Post by **dayglo jim** » Thu Mar 18, 2021 8:47 pm

If you have a 3D printer I'd make another bracket and weld that to the panel, rather than the snapped part to the bracket. You could widen the base of the bracket to give it a bigger base to weld with.

Post by **formula400** » Fri Mar 19, 2021 3:36 pm

Got to love flowers triumph, order Wednesday night, here this morning.

Post by **Mr. Dazzle** » Fri Mar 19, 2021 4:03 pm

Definitely the easiest solution

Post by **formula400** » Fri Mar 19, 2021 5:26 pm

Mr. Dazzle wrote: ↑Fri Mar 19, 2021 4:03 pm Definitely the easiest solution

For sure.

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gluing a plastic lug thing, what to use

gluing a plastic lug thing, what to use

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