In the attached image I want to attach the blue tube to the white disc, its not thick enough to accept screws so must use an adhesive, I will be using it to make a small wind vane . (The disc is from a shower attachment that lights up when it spins) What would be the best way to attach this, glue etc?
If it we mine I think I?d start by drilling out the centre of the disc to the tube diameter to allow a tight interference fit as any bond between the end of the tube and the face of the disk is going to be very weak.
Tim
I would also check what the two materials are. The white bit looks a lot like natural nylon to me.
Can?t you fill the end of the blue tube with something - a plastic cork etc glued and pinned - then use glue and a screw or pins on the end ( using the increased surface area) ?
Yes, I was thinkig of inserting a dowel into the blue tube if you could get or make one the right diameter. If it was slightly larger all the better if the blue tube could be softened with heat and then the dowel inserted. This would give good friction fit. If you have the facility to turn up a small dowel then the location point of the lathe head would give an exact centre point for any screw
You can use a weld or a solvent of cours, but as said, that interface is always going to be weak. Is there no other way to do the job you are wanting to do or than mechanically? Brian
Can one still buy PVC solvent-welding paste over-the-counter? It's pretty nasty stuff to breathe but it melts the two mating surfaces of the PVC and fuses them together when used properly. If, as suggested elsewhere in this thread, one of the pieces might not be PVC then finding out what it is really made of would be essential before going down that route.
Nick
I would drill / bore out the gear with a hole to match the OD of the tube. Go for an interference fit. Glue or solvent weld in place (although you may find that gear is nylon and not compatible).
You could also drill and tap a hole through the side of the gear between the teeth, and then fit a grub screw (and if doing that I would plug the end of the blue pipe with something solid before assembly so it can't crush)
Maybe the turbine piece is basically hollow, housing the generator?
I need to repair the nozzle of my ancient wickes (earlex) wet/dry vac by cutting off the last 3 inches of one of the supplied flimsy plastic xtensions tubes and gluing that the existing swivel outlet of the flexy tube. This is some sort of soft black pvc that would have been formed using the heat+pressure of an extruder. What would be a suitable glue for this be ?.
I think I will go a for a plug in the end of the tube (I have a small unimat lathe) and then use a glue + 3 small thin screws from the underside of the `gear`. The inside of the gear has a magnetic circle so cannot come in from the side. The `gear` part was driven by water in a shower head to light some LEDs, so I want to put some wind vanes (likely half table tennis balls) to drive it. It will serve no purpose other than for my amusement if it works.
Is the white part pvc or nylon?
If both PVC then consider solvent weld
Based on appearance, I?d say 99% chance it?s nylon.
Tim
Perhaps check waste pipe couplings in the plumbing section of Screwfix/Toolstation and a the associated solvent weld (glue)
If its a flexi tube that has split try winding round some self amalgamating tape. Remove the backing from the tape and then stretch it x3 its length whilst winding it around the tube. The tape bonds to itself
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