I've read about it somewhere , but don't recall the details ... Broke the last (nearly new) band for my horizontal , figured I have nothing to lose but a little time , a bit of shield gas and some 'lectrons - oh , and I'll need to make a clamp block to keep the blade aligned as I weld on it . Got a new blade on the way , but just got a bug to try this . I know low amps DCEN , what filler ? Got ER70S2 ,ER70S6 (MIG wire) , ER
308/309/312 and some Invar 42 nickel/iron . The blade is an Irwin (IIRC) bimetal 10/14 pitch . Am I going to need to anneal the weld ? O/A torch OK for the task if it's needed ? I know I want to minimize the HAZ .
TIG welding bandsaw blades (2025 Update)
Mar 04, 2019
Last reply: 8 months ago
1 Replies
For whatever it is worth, I seem to remember a band saw with an attached blade welder that clamped the blade in a holder with two sections, a fixed clamp and a movable clamp. When you hit the switch the current was applied and the spring loaded clamp moved that end of the blade toward the fixed end of the blade, sort of like a spot welder. There was no filler material. When the weld was finished there was some "bead" on both sides of the blade and the welder had a small grinding wheel attachment so that the weld "beads" could be ground smooth. No annealing or filler metal
Earlier on we used to grind each end of the blade to a knife edge, and then overlap the ends and silver solder them together.
Given that most band saws have large enough wheels that the blade is not bent sharply I suspect that the joining is not a really critical thing.
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