Welding extensions to tangs?

[Longbaugh]

.....

 

[jdm61]

if the tang is wide enough, maybe you could thin down the very end, drill a hole in it, then mill/drill a slot and hole in some decent sized allthread rod and pin them together and peen down the ends of the pin. I have seen that somewhere before. Or start with a small size square bar, slot, drill and thin down the square part and grind the other end round and thread it.

 

[Steinerj]

The way I have been taught is to dovetail the tang and silver braze the threaded rod on

 

[SteelSlaver]

You can weld on the tangs. Couple of things though. First is what kind of steel are the blades. If they are stainless I would use stainless all thread (or a bolt with head cut off) and do the weld with 309 rod. For low alloy like 5160 or 52100 I would use a low chrome rod with a B2 suffix. On simple carbon I would use 7018. I would preheat the tang area and extension in all cases to at least 500f, weld one side turn it over grind out the backside until I reached the new weld then fill that grind slot back out with weld. Then I would allow to cool then reheat weld area with a torch until red and allow to cool slowly. Heat sink the blade with aluminum plates and keep those cool with water or keep blade area wrapped in wet rags. Something to keep that area from getting over 400f. You could also silver solder on the extension. Grind both pieces to an angle and match them up so you have a long joint. Flux well and solder. Jim

 

[birdog4]

I preheat then post heat the area adjacent to the weld when I mig them. Also I always use some sort of dovetail, never a buttjoint. Just keep a wet rag wound around the blade.

 

[indian george]

The way I have been taught is to dovetail the tang and silver braze the threaded rod on

Who taught you that?????

 

[Steinerj]

I forget who taught me that but I remember a related lesson in removing arm hair with an oxy torch

 

[indian george]

I forget who taught me that but I remember a related lesson in removing arm hair with an oxy torch:jerkit:

You forgot?? I hope you forgot where the shop is too.

 

[T Blade]

You forgot?? I hope you forgot where the shop is too.

Wa..Wa..Wally, only lucky people forget where your shop is

I must be very unlucky cause I still know where you live, you must be unlucky cause I still know where you live

See ya too soon :jerkit:

Maybe Saturday Kook and I will come over.

 

[Fox Creek]

Umm, what I have done with great sucess is cut/file a VEE into the tang and a corresponding VEE into the all-thread or what ever and brass braze them. Insulating fire bricks and a wet rag will keep the blade cool while you do this. Brass brazing is great, you can use a small torch (with fire brick around the join to reflect and contain the heat, and small slivers of yellow brass for your "Spelter". Use Borax for the flux.