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Brazing ?
Macbeast - 26/7/07 at 12:41 AM

Not wanting to get into welding kit expense, I seem to recall that you can do brazing with the higher temperature gas cannister torches.

Would this be ok for sump shortening and moving oil filler neck on rocker cover ?

big_wasa - 26/7/07 at 05:42 AM

If you have an arc welder I have a Brazing atachment that you can have

designer - 26/7/07 at 06:20 AM

Brazing is OK for this.

britishtrident - 26/7/07 at 06:29 AM

quote:
Originally posted by designer
Brazing is OK for this.


Yep More than OK for this type of job.

Silver solder is also fine.

With both processes everything needs no be prpoperly cleaned before you start, and use the correct type of flux --- usually Borax powder flux or coated rods.

However brazing or silver soldering a large work piece using a MAP gas blow lamp isn't really on as the they don't give concentrated heat.

caber - 26/7/07 at 07:09 AM

How can anyboby who messes with cars not have a welder these days!Go on get yourself a MIG set or even better a cheap Chinese TIG set, you will be amazed how much you will use it, and how many new friends you get who just need a quick patch on something or a lwnmower handle fixed!

Caber

Macbeast - 26/7/07 at 07:15 AM

TY all.

Caber, I'm coming up to Scotland next month. I'll bring the lawnmower handle, OK ?

mookaloid - 26/7/07 at 08:00 AM

I fixed a mates lawn mower handle with a blob or two from the mig a couple of weeks ago

David Jenkins - 26/7/07 at 08:06 AM

quote:
Originally posted by britishtrident

Silver solder is also fine.

<snip>

However brazing or silver soldering a large work piece using a MAP gas blow lamp isn't really on as the they don't give concentrated heat.


Silver solder really needs a special flux for best results. It's also finnicky about the cleanliness of the area to be joined - it's got to be spotless. Finally, it's bl**dy expensive!

A friend brazed the bottom of a sump for me, but oxy-acetylene was required, to get enough heat into the joint area without overheating the whole sump. The metal has to be heated to bright orange for brazing, and that's not easy with a conventional gas torch!

Peteff - 26/7/07 at 10:01 AM

Anyone on here not fixed a lawnmower handle in the last month please leave the forum I did one 3 weeks ago. I used my old Portapack to put a patch on the van the other day as well. I definitely could not cope without a welder of some description. If you want to use Wasa's brazing attachment there's an old oil cooled arc welder in the shed here.

David Jenkins - 26/7/07 at 10:30 AM

I replaced the blade on my lawnmower last week, but that involved a spanner, not a welder.

Does that count?

iank - 26/7/07 at 10:30 AM

FWIW you can braze with a mig welder - not that that answers the original query

http://www.mig-welding.co.uk/brazing.htm

p.s. for the pedantic he's really talking about bronze welding not brazing, but the terms tend to get commonly confused. Caged seem to use this for putting together Caterham chassis.


[Edited on 26/7/07 by iank]

lsdweb - 26/7/07 at 11:43 AM

I dropped a valve (actually the seat fell out) on my lawnmower last week - a few days before bending 12 valves on the race car. I have to fix both so does that count??

graememk - 26/7/07 at 12:04 PM

i ran over a garden light with the mower the other sunday.

not that its anything to do with brazing

awinter - 26/7/07 at 12:46 PM

I don't have a mig or a lawn mower.
Can I stay?

iank - 26/7/07 at 12:55 PM

My lawnmower isn't used enough to break a handle.
It's also only got an electric motor <oh the shame> and plastic blades <sob>

David Jenkins - 26/7/07 at 01:23 PM

quote:
Originally posted by awinter
I don't have a mig or a lawn mower.
Can I stay?


Sorry, no.

We do have standards to maintain...

Peteff - 26/7/07 at 02:47 PM

No I think he means brazing in the true sense of the word, he's joining two bits of plate not building his chassis. Here is a bit of a guide.