JoelP
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| posted on 22/9/03 at 08:25 PM |
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Brazing Advice Reqd.
I went to Halfords today, as advised, to get some brazing rods. The only ones they had were flux coated, are these the right ones?
And the fella working there said that a blowtorch wouldn't get them hot enough to melt, that only an electric arc or an oxy-acetylene torch. Is
this true? cos if it is then thats trouble....
his own words were 'nowhere near hot enough'.
any advice? thanks in advance.
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Mark Allanson
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| posted on 22/9/03 at 08:27 PM |
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Sexy ahotaline is the only way to go
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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JoelP
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| posted on 22/9/03 at 08:40 PM |
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goddammit
how much does one of those cost?!?
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Mark Allanson
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| posted on 22/9/03 at 09:01 PM |
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Second hand set are usually £50-£100, but its the rental on the bottles which is the killer. They are really useful though, cutting, bending, welding,
brazing, freeing of siezed components..........had better shut up now or I will talk myself into a set!
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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blueshift
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| posted on 23/9/03 at 02:06 AM |
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I nearly bought a set. machine mart do a set for 200 quid that has everything you need except the bottles. bottles are something like 35 quid a year
rental each (so 70 for both) and similar money for a refill. BOC gear looks the tits but costs more (like twice as much)
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suparuss
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| posted on 23/9/03 at 05:43 AM |
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ive seen some complete sets with a trolly on ebay recently and think it was about 80quid or somthing, not too bad. i think it was listed as a porta
pack so trolly might be for small bottles. shes got a set a lean tits that welders daughter!! 
Russ.
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Mark Allanson
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| posted on 23/9/03 at 06:44 AM |
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Porta Pack is BOC's own make, very small bottles, but works well
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Mix
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| posted on 23/9/03 at 07:11 AM |
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Had the chance to pick up a set cheap not so long ago, very useful as mentioned above. Highly recommended, just knock the cost off of the £250
BTW I've heard that some people manage to aquire BOC bottles from sources other than BOC and then find a local account holder who will exchange
them on their behalf for a suitable cash adjustment, thus saving the rental and filling charges.
Surely this can't be cricket 
Mick
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timf
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| posted on 23/9/03 at 07:34 AM |
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b@q do a map gas / oxy little set for £35 - £40 ok if your just doing the odd one off not for large scale use tho
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David Jenkins
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| posted on 23/9/03 at 07:38 AM |
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quote:
Originally posted by JoelP
I went to Halfords today, as advised, to get some brazing rods. The only ones they had were flux coated, are these the right ones?
And the fella working there said that a blowtorch wouldn't get them hot enough to melt, that only an electric arc or an oxy-acetylene torch. Is
this true? cos if it is then thats trouble....
his own words were 'nowhere near hot enough'.
any advice? thanks in advance.
It depends on what you're trying to heat!
If you're trying to braze a shortened sump, then a blowtorch won't do it. If you're trying to braze an oil pickup pipe, then it
will.
The aim is to get the metal (steel, I presume?) up to orange/yellow heat, which you can easily do with small pieces like thin-wall pipe.
If you are talking about something small, stand the metal on a wall block (breeze block or similar) and pack it around with more pieces of block. You
should have no problem then.
David
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CHRIS.H
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| posted on 23/9/03 at 06:23 PM |
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brazing
you have u2u
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andyps
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| posted on 25/9/03 at 08:27 AM |
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I have a brazing attachment for my arc welder. I have had it for years, it uses two carbon arc rods which you touch together to start the current flow
and then move apart to produce the flame. It has always worked well enugh for my brazing needs.
Andy
An expert is someone who knows more and more about less and less
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David Jenkins
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| posted on 25/9/03 at 08:32 AM |
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Andy,
I've often thought about trying one of those things - they seem a bit scary though!
How difficult is it to maintain the arc, i.e. how often do you have to adjust the carbons? And how long do they last?
How close do you have to put the arc to get the braze to run?
cheers,
David
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andyps
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| posted on 25/9/03 at 08:39 AM |
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As I said, it has always worked well for me. Once the flame is set right it lasts a few minutes before the gap between the rods needs adjusting. As
for the carbon rods themselves, they last for ages. Whilst I don't do much brazing, I have had my set for probably nearly 25 years (my god, that
makes me feel old!!) and doubt if I have used more than half a dozen pairs in that time - need some new ones at present though!
I have never found it scary to use, and it is good for freeing seized component and can even be used to cut through metal sheet - although not very
accurately, but I have used it when cutting up cars.
Andy
An expert is someone who knows more and more about less and less
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timf
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| posted on 25/9/03 at 08:46 AM |
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quote:
Originally posted by andyps
I have used it when cutting up cars.
i used a oxy-propane cutter to remove my donor lots cheaper than oxy-acet
BTW i saw an old episode of the a team the other day, why did mr t always weld with a cutting torch. it's bloddy difficult.
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Peteff
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| posted on 25/9/03 at 09:07 AM |
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why did mr t always weld with a cutting torch.
It wasn't real, they were actors and he was only pretending.. A cutting torch makes more sparks to impress the kids who watch the program. It
would work on thick metal like girders.
yours, Pete
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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timf
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| posted on 25/9/03 at 09:19 AM |
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quote:
Originally posted by Peteff
It wasn't real, they were actors and he was only pretending..
What, you mean it's not a true life story,
oh no my faith in tv is destroyed.
next you'll be telling me that knight rider and air wolf ar works of fiction as well.
ps thats showing my age i as i watched the originals on itv.
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DaveFJ
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| posted on 25/9/03 at 12:02 PM |
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Bought myself a Blowtorch and some brazing rods from Halfwits yesterday and Brazed my oil pickup pipe last night - no problems at all.... The brazing
rods I bought were expensive (about £3.50 for 2 !) but were marked up as 'for use with a blowtorch' - It certainly did the job for the
pick up pipe - dunno how it would cope with a larger job though.
Also picked up a 'disposable' bottle of Argon/CO2 mix for my shiny new MIG welder £7.99 - is that cheap??
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JoelP
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| posted on 25/9/03 at 12:33 PM |
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Pretty much the same as machine mart, but it is still cheap innit? feels like a waste of the bottle though doesn't it throwing it away so
often?
in the little row at halford i couldn't see the blowtorch ones, maybe they dont have those in leeds... bummer.
might just buy an original sump and let the speedbumps chop it down to size...
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James
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| posted on 27/9/03 at 01:54 PM |
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quote:
Originally posted by JoelP
might just buy an original sump and let the speedbumps chop it down to size...
The ConrodKid's tried doing it that way. He now has a large oil puddle on the garage floor!
You could pay MK to do it for you. They'll put a box on the side so you can keep the same oil capacity too.
I've tried two sumps now. The first one was Mig'd and leaks. The second one I gas welded a plate I put inside the sump and it so far seems
ok.
HTH,
James
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Rob Lane
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| posted on 27/9/03 at 04:45 PM |
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When we were site welding and cutting I've used a burning torch to gas weld or braze BUT using one trick.
The torch was pushed hard down into clay soil and the multi hole nozzle blocked. I then used a nozzle cleaner reamer to clean one hole only. This
then made a nice small flame with which to weld or braze. Thing is, on site it was easy to clean again and go back to cutting.
Done many a 'homework' job that way in the past.
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JoelP
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| posted on 27/9/03 at 05:07 PM |
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a mate round the corner has taken it to tig it, apparently hes good so we shall see. i reckon with the argon mix it might've been leak free.
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DaveFJ
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| posted on 29/9/03 at 12:40 PM |
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as soon as I have sourced some suitable plate I will be mig'ing mine - so fingers crossed....
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