Wilton vise repair - need advice

Does brazing suck up into the joint like soldering? Thinking out load that a hard solder sucked inside might hold better that a brazing that does not.

Maybe even putting a sleeve inside the tube, to give more wall thickness to thread for the bolts to hold into. Drill the holes in the jaw, then screw in the tube (with insert inside). Then braze (or solder), from the end, and through the holes. Then drill and tap the tube, and insert the bolts.

Or maybe some pins, instead of bolts.
 
I would try brazing. Can you sandblast first to get it chemically clean? You may need to make a makeshift furnace to pre-heat. If you have insulating ceramic wool or insulating firebrick available you could build a primative enclosure and use a weed burner to pre-heat. I am thinking just stack up some firebrick around the parts.
Robert
 
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