Aluminium welder / Welding & Repairing Alu

We keep breaking the frame that holds the box in place on our cargo bike. It needs strenghthening as well as welding, but at the mo, we will settle for welding.

Anyone got any idea where to start looking? I have no clue, and no-one we have spoken to has been able to help.

Really needs to be someone in London.

Not sure if he deals with alumininum, but Ted is pretty handy with a welding torch?

We already tried Ted. Not an ally guy. Max is out of the country too.

Try pming Brucy if he can't do it he may know someone.

http://maps.google.co.uk/maps?f=q&source=s_q&view=text&gl=uk&q=aluminium+welders+london&ie=UTF8&hl=en&sll=51.522972,-0.134444&sspn=0.378992,0.829627&latlng=51609985,-244824,12849702975661748375&ei=eN72ScuPNp3UjAeN2YzlCw&cd=7

Nice. Known to you? Or just googled?

Just google. But the description seemed to fit what you're looking for.

If you do get in touch with a shop, ask about alu pipe for mallets ;)

More google, but: http://www.weldingmobility.co.uk/aluminium.html - mobile alu welding sounds promising.

mike burrows?

mike burrows?

He doesn't weld, he's a massive cock, and he's in Norfolk not London.

call caspar, they found some old bloke recently

call caspar, they found some old bloke recently

Cheers, will do.

If you're in or near north London, you could try this chap who did a non bike related job for me pretty cheap.

Bunns Lane Welding

! hit a pothole and have developed a hairline crack on the rim where the braking surface. The crack is abut 75mm long and runs more or less parallel to the arc of the rim. Does any one know if this is repairable? If the rims are cast, I would assume not, but my knowledge and experience are negligible.

I'd have said that the cost of repairing properly would be disproportionately expensive.

Most aluminium is heat treated, so once you'd found someone to fix the rim, you'd have to disassemble the wheel to re-heat treat the fixed rim (assuming the fix involved any sort of welding).

I'd imagine that a new rim would probably be cheaper and more convenient.

bin it fiddy, no chance and not worth getting it done.

Also, given the description of the crack is sounds like the braking surface on the rim is just worn out.

you hit a pothole and broke your rim.

photo + report to council = new rim

welcome to the litigation society baby...

hi, I have a tiny crack (about 15mm) on my seatclamp and seat tube. The seat clamp looks like a regular one but its part of the frame. I've been ringing around a few places and Bob Jackson's said something about having to have the whole frame heat treated after its welded...the crack isnt in a structural area and its been there for 4 years and hasnt gotten any worse. the seatpost slips by a few mm every couple of weeks but apart from that there's no problem. i want to get it welded as im going to have it resprayed and want to restore it to its original state

can anyone shed anymore light on welding aluminium? cheers

from what I understand, aluminium frames are heat treated after it is welded so further welding makes it brittle - not 100% tho, im sure tommy with be along in a sec ask him ;)

was just doing a bit of googling - some people get cosmetic cracks in aluminium fillet brazed before painting

Silver solder maybe, or brazing?

google aluminum repair, there is some sort of brazing rod that is meant to do a fairly good job at repairing crack e.t.c

Depends on the type of aluminium alloy used.

if it's heat treated (6000 series?), you have to do another heat treatment after the repair. That's what makes it difficult for most welders. They can weld, but cannot do the heat treatment.

If it's not heat treated (7000 series?), it should be not too difficult for someone experienced in welding alu.

http://www.frost.co.uk/item_Detail.asp?productID=8823&frostProductName=Lumiweld%20Kit%20%285%20rods%29&catID=33&frostCat=Welding&frostSubCat=&subCatID=

Fr the lumiweld rods