learning to braze

[1930artdeco]

I need to learn how to braze some cast iron that has already been brazed. I have three pieces on my floor jack that switch the jack from the up and down position that have worn over the past 70 years. At some point someone has already brazed the two levers and cam but they have worn down so it is time to do it again.

So here is my question: where do I start to learn about brazing? What I have read on the net is about joining two pieces of metal. I am building up with brazing rod and filing down. I am going to have to learn as finding someone willing to actually do any brazing is very difficult around my neck of the bay. I will post some pics when I get home.

Thanks,

Mike

 

[Richard Cranium]

collage, skill center, Machine shop

 

[olllotj]

 

[Cudajas]

you have a floor jack that is 70 years old...dude spring for a new one!!

Jason

 

[Zeke]

Lot of brazing tips from Keith Fenner: https://www.youtube.com/results?search_query=keith+fenner+brazing

 

[brownbagg]

learning to braze take all of four minutes

 

[Barlow L]

you have a floor jack that is 70 years old...dude spring for a new one!!

Jason

And I bet the farm to the hole of a donut that nothing could be bought today that worked better than that 70 year old worn out jack!!!!!

 

[zkling]

Hi Mike, do you already have a torch set capable of brazing temps?

Assuming you are familiar with basic torch procedue, the best advice I can give you is to let the work melt the rod and not the flame just blasting it in the joint. Just like soldering. There is also too hot where you will be bringing the braze to a boil.

Practice on a few pieces of scrap steel, then scrap cast iron and then you should be able to do the parts you need. Your biggest problem is going to be cleaning the old braze and parts thoroughly. If you want someone else to do it look locally for someone in large plumbing or HVAC work, almost anyone competent in that field will know how to braze very well.

you have a floor jack that is 70 years old...dude spring for a new one!!

Jason

 

[1930artdeco]

AFter looking at you tube, and seeing what I would have to buy I could probably get it done cheaper in a shop. But, I run across a torch set up (I don't have one) I will get it. Thanks for your replies.

Mike

 

[driz]

It's really quite easy as is welding. Watch a couple Utube videos and then cherry it up. Do practice on something first though. Most times you can do small items with just a propane swirl torch. It just takes longer to get things hot but still works.
I usually weld but it is funny with the jack. The last thing I brazed was a big washer into the screwdriver slot on my 30 year old Chinese special. Now I don't have to keep sticking the handle in the slot to tighten the valve

 

[Steinmetz]

Lot of brazing tips from Keith Fenner: https://www.youtube.com/results?search_query=keith+fenner+brazing

Agree. Look at "merry go repair three" for example.

 

[driz]

And make sure you pick up some FLUX.

 

[zkling]

This guy is going to need a $400+ investment plus time to learn the skill. Unless he just wants to add tools and skills to his mental tool box, it will be much cheaper, faster and easier to have someone else do it. Just my 2¢

 

[taumac]

If looking for a torch setup I got one at Tractor Supply. It was 319 with tanks. Its a Victor torch, gauges. You exchange them at thoroughbred exchanges locations just like Blue Rhino propane. I like it cause there's a Rural King up block I can get my tanks exchange while there only few LWS or airgas places around and hours don't work.



Have a good one, Gerard

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