Silver solder suggestions

[Dhal22]

Who doesn't love a good thread drift?

The steel tubing in those photos that I'm essentially butt joint welding is with 56% silver solder and appropriate flux. Put a joint in a vise and beat it with a hammer and it might fail. Maybe. Very strong joints.

 

[Technical Ted]

I got some of this from Amazon. You can use either the white or black flux depending on how hot you will heat things. I got a can of each from Amazon as well. Best prices I could find and great quality (Harris). I use it for making small, internal threading bars.

Harris Safety-Silv 56% 1/16 Silver Solder Brazing Alloy 1 Troy Ounce, 75310 5631 - - Amazon.com

Harris Safety-Silv 56% 1/16 Silver Solder Brazing Alloy 1 Troy Ounce, 75310 5631 - - Amazon.com

www.amazon.com

Ted

 

[Technical Ted]

People call it silver "soldering" but when using the higher temperature hard, higher percentage silver it is actually silver "brazing". The difference is the percentage of silver content and the temperature required to melt it. You want hard silver solder (silver brazing) for bonding a HSS tool bit to a steel or alloy bar.

Ted

 

[seasicksteve]

I would consider a brazing paste take a look here
https://www.sra-solder.com/soldering-brazing-supplies/brazing
You might want to contact them for a recommendation for you application, I have used the fusion brazing paste in the past It should be ideal for your application

 

[Technical Ted]

Here's the flux I bought, both white and black depending on the temperature needed:

Black:

Harris SSBF1 Stay Silv Brazing Flux, 1 lb. Jar, Black: Amazon.com: Industrial & Scientific

Harris SSBF1 Stay Silv Brazing Flux, 1 lb. Jar, Black: Amazon.com: Industrial & Scientific

www.amazon.com

White:

Harris SSWF1 Stay Silv Brazing Flux, 1 lb. Jar, White: Amazon.com: Industrial & Scientific

Harris SSWF1 Stay Silv Brazing Flux, 1 lb. Jar, White: Amazon.com: Industrial & Scientific

www.amazon.com

The flat ribbon solder is nice for brazing tool bits, but I went for best price and I also wanted the wire for brazing other things besides tool bits.

Ted

 

[bill70j]

People call it silver "soldering" but when using the higher temperature hard, higher percentage silver it is actually silver "brazing". The difference is the percentage of silver content and the temperature required to melt it. You want hard silver solder (silver brazing) for bonding a HSS tool bit to a steel or alloy bar.

Ted

I have also used Harris Safety-Silv with the black flux to braze carbide to CRS. Here's a pic of a RH boring bar for use in external turning using a boring head. The carbide is a piece from a damaged TPG insert.

 

[ericc]

We could pay $50 each and just pass it around to look at it. He might make $1000's that way. I'm interested as well.

$50 for what? I seem to have lost track of the thread.

Silver solder is not that expensive, since a little goes a long way.

 

[Technical Ted]

Silver solder is not that expensive, since a little goes a long way.

Yes, it doesn't take much! With a good, clean, tight fit the solder will suck right in.... don't over do it and end up with a puddle of silver on your bench or floor!

That Harris silver I bought will most likely last me the rest of my life (Yeah, I'm older, but hopefully around for quite a while longer!).

Ted

 

[benmychree]

The silver solder used to tip carbide tools commercially is a silver alloy/ copper /silver alloy sandwich; the copper shim provides a cushion between the shank and the carbide bit, aside from that ideal solution, silver alloy strip would be the second best, wire after that. After the silver flows, the carbide bit it pushed firmly against the shank until the silver is solidified.

 

[Suzuki4evr]

Thanks everyone for your input. You have helped alot. I think I will go with the Harris safty-silv and black flux. I just need to see where I can get it cheapest considering I live in South Africa and shipping is a bit expensive from the US.