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FT: Frame (Twin) Straightening Footrest Hangers


eharris

Website User
VOC Member
Hello all,

I need to straighten a footrest hanger and realise that to do so I'll need to apply some heat.

I presume my butane blowtorch (DIY soft solder copper plumbing type) won't be able to get it hot enough (or will it? I don't know, which is why I'm asking here!), so should I use MAPP gas, or go and find someone with a big blowtorch?

Cheers,

Ed.
 

vibrac

Well Known and Active Website User
VOC Member
You could always get some fire bricks,coal, and some bellows
 

Bill Thomas

Well Known and Active Website User
VOC Member
There are newer Butane torches now , That get very hot, Why not get 2 , But you may need a friend, I think to hold one, machinemart.co.uk Good Luck, Bill.
 

vin998

Well Known and Active Website User
VOC Member
VOC Forum Moderator
Ed
You need to get the footrest hanger hot enough to get it glowing red but just in the area you want to bend. If you use too large a torch / flame and get too much of the hanger glowing red you will have difficulty bending it in the required place as it can move anywhere the metal is hot enough.
 

vin998

Well Known and Active Website User
VOC Member
VOC Forum Moderator
Oxy-acetylene will do the job but not that many people have access to it due to regulations etc. You can now get oxy-propane kits which can be used for DIY and will not get as hot as acetylene but you can braze with them and get steel red hot to bend etc.
 

eharris

Website User
VOC Member
Thanks for that.

I've got some butane/propane mix canisters, and more than one blow torch, so perhaps I'll give it a go.

Given the cost of new hangers it's worth a little of my time to try to sort it out.

It'll amuse the kids at any rate!
 

eharris

Website User
VOC Member
Success!

That went surprisingly well.

I used two normal cheap DIY blow torches, with butane/propane mix canisters (the fuel may not be relevant), and got the thinnest part of the hanger up to a good red glow.

Initially I tried heating it outside the garage and then bringing it in, but it cooled too much, so I ended up keeping it in the vice in the garage.

Heating it with both torches and when it was red putting one torch down, picking up the lever I had selected, whilst still using the other torch to slow the cooling and applying some force. It was quite odd to feel it moving like very thick toffee under the effort of the lever.


Your mileage may vary and please don't repeat this without thinking through all the possible outcomes of blow torches and red hot metal!
 

vibrac

Well Known and Active Website User
VOC Member
And to think Grandad did it all with coke a few bricks and bellows
 

Bill Thomas

Well Known and Active Website User
VOC Member
I have always thought it would be nice to have a wood burning stove in the garage, But with my Smelly Comet,
Mk2 Concentric, The slide is always wet !!, I would be blown to bits !!. Cheers Bill.
 

Gary Gittleson

Well Known and Active Website User
VOC Member
So how did the chrome look afterwards? My right hanger is a bit bent too and I have Oxy-Acetylene but have been reluctant to address it because of the chrome. The bend hasn't been a bother in riding but somehow does bother me when off the bike.
 

vibrac

Well Known and Active Website User
VOC Member
Regulations and oxy acetelyne: Did I dream seeing it for sale in Bricolages in France and Harbour Freight in USA?
I belive the USA has it on offer you have real freedom there but if France has it then where is the EU level playing field?
 

nkt267

Well Known and Active Website User
VOC Member
Hobby gases supply mine..I get it from the local car parts shop.
 

ClassicBiker

Well Known and Active Website User
VOC Member
I can not remember when there wasn't an oxy-acetylene torch in the garage. My father bought the set I have now sometime in the '70s. He bought it off the firm he used to work for, tanks and all. Here you own the tanks as such and just exchange them when they are empty for full ones. A code enforcement officer came to the house one day over something unconnected and saw them and said they had to go because they were high pressure compressed gas tanks and they weren't allowed in residences. I said I have a dozen scuba tanks in the basement, which I did, and each one of them is pressurized to 3500 psi. I asked if I had to get rid of them, she replied no they were for my recreation, so I said so are those I create welded sculptures for fun. She said well then it's alright as long as I wasn't running a welding business out of the garage. Gotta love it.
Steven
 

eharris

Website User
VOC Member
So how did the chrome look afterwards? My right hanger is a bit bent too and I have Oxy-Acetylene but have been reluctant to address it because of the chrome. The bend hasn't been a bother in riding but somehow does bother me when off the bike.
Mine needed re-plating before I started, so I'm not really in a position to comment. I do suspect that it is unlikely to survive the process, unless you are very lucky/talented.
 

RDB58

Website User
VOC Member
When you take it to red heat (cherry red) which is strongly advised to re bend it then the chrome is gone. Oxy is the way to go as you only want to heat the area that needs bending. Sounds like you are a successful black smith. Well done.
 

Cyborg

Well Known and Active Website User
VOC Member
Regulations and oxy acetelyne: Did I dream seeing it for sale in Bricolages in France and Harbour Freight in USA?
I belive the USA has it on offer you have real freedom there but if France has it then where is the EU level playing field?
Unless you feel the need to weld, then oxy propane is a good alternative. You can heat, cut, and braze with it. As for anyone telling you can’t have one.... the O2 tank is for Uncle Jock, and the propane tank is for the barbecue.... or have they taken away your barbecues?

 
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