Good metal worker in london?

[jerrysimon]

Sorry Jerry, maybe I dimmer than usual tonight, I know are not, but steel is an alloy, so I am not sure what you meant?

No its me that is being dim tonight lol

Regards

Jerry

 

[johnc461165]

Hi cwah PM sent we need to establish exactly what you need e.g finished drop out width etc.

Hey guys wish I still had my gas welding gear, brazing is such a nice way of bonding metals together love to see that brass flow into the joints, god I must be a saddo, don't mean that it's just something that I love to do.

Wurly and me are just normal guys, just like you would help us if we needed it.

 

[cwah]

Thanks a lot John. You both are definitely more than normal guy, you proposed to help without asking for any compensation. That's really great!

I keep posting here so maybe this thread can help other people than want to convert their brompton.

Basically the need is to have a dropout wide enough to accept a 135mm motor. So I can change motor later on if I need to. And the bike has to fold otherwise there is no point about having a brompton.

If you have time, the dropout could be renforced to support the torque but you don't have to worry about that because I already purchased a torque arm.

Apart from that, I'll later purchase the brompton rear rack to allow the bike to roll once folded but I don't think that's something we have to worry now.

And that's it. Not sure what else I can add and that's already a lot!

 

[johnc461165]

OK cwah get them in the post.

PS if you put "brompton rear forks" in google then search images there are some with motors and nexus rear hubs fitted, you might find this of interest

 

[cwah]

Yeah, I've just seen him spreading the fork with just an axle:

http://mistymornings.net/blogs/mm/?p=45
Maybe I could do that too?

 

[cwah]

Actually, as expected it seems that it was the forkend that bended rather than the entire fork:

http://mistymornings.net/blogs/mm/?p=45

So the rear fork isn't maybe not as strong as it should be. Maybe not good if I use a motor with good torque.
It may break at the forkend area during acceleration.

 

[johnc461165]

I think with a torque arm fitted it should be ok I can look at reinforcing the dropouts as well.

 

[cwah]

Ok, I'm going to try it. I think I may have the required elements at home.

Will keep you posted soon

 

[johnc461165]

Ok, all the best still around if you need me John.

 

[eddieo]

do you think you will get enough clearance for a motor without cutting the cross member because I dont.....

if your going to DIY what about cutting cross member and worry about getting it welded afterwards

 

[wurly]

I would go very careful if i were you.
Those pictures show the fork being bent in the complete wrong manner. Yes he got the hub to fit, by bending the droputs not the forks(from what i can see). If the crossmember was cut, the forks would be allowed to bend with less force exterted. The threaded bar could then be used to 'pull back' the dropouts with a bit of heat on the tubes and a block of wood placed in the right place. Although i must admit, i didn't realise the tubes might be brazed instead of welded. There is a right way or a wrong way to tackle this job. Not sure if those pictures are showing the right way?

 

[cwah]

hmm... what should I do then?

Cut the cross bar, extend it and find someone to weld it back?

 

[eddieo]

hmm... what should I do then?

Cut the cross bar, extend it and find someone to weld it back?

put it in the post......

 

[wurly]

I would cut the crossmember, then try to prise the forks and get the hub to fit. If the dropouts bend instead of the forks, stop.Do that and lets see how it looks.

 

[cwah]

my big issue is that if I do that, it's going to bend on the nuts area between the fork and the frame:

This is the only "connecting" area between the frame and the fork. I'm not sure the bike would still be ok if I fragilize this area.

 

[wurly]

ok i see the problem. It looks like bending them with heat is the best way or cutting and welding. i think posting them to John and leave him to rework is best. My offer still stands.
(I must get back to work)

 

[Deleted member 4366]

Cwah, Just put them in the post. No more discussion is necessary. I'm sure John will figure out the best way to do it and it'll cost less than what you were expecting.

It's becoming like a typical management meeting, where they intellectualise and discuss every problem but nothing gets sorted, because someone always finds a different solution to discuss. Use the Toyota motto: "Just do it!"

 

[cwah]

Ok thanks guys. Going to arrange that then.

Hope it's still ok for you John.

ps: By the way, the motto "just do it" isn't from Nike?

 

[Cyclezee]

Use the Toyota motto: "Just do it!"

then sort all the problems at recall

Another Toyata motto I have heard is "moving forward.............. even when you
don't want to"

 

[Scottyf]