From: Snag_one@msn.com   
      
   On 2/18/2026 6:43 AM, David Billington wrote:   
   > On 18/02/2026 03:52, Snag wrote:   
   >> I'm going to try my hand at brazing new carbide on some chipped and   
   >> worn boring bars for my mill . I have 3 choices for heat source , O/A   
   >> , TIG , or my induction heater . I also have a couple of choices for   
   >> braze filler , phosphor bronze TIG filler , regular brazing rod , and   
   >> silver solder if I can find mine . I also have some brass wire ,   
   >> composition unknown and a few sticks of silphos , though I don't know   
   >> if that will stick to steel . I also have both borax and regular   
   >> brazing flux .   
   >>   
   >>  The plan is to heat and remove the old/broken insert , apply flux and   
   >> a thin piece of brazing filler topped with a new carbide piece , and   
   >> heat to brazing temp . After watching a couple of youtube videos it   
   >> looks like I may need to hold the new carbide in place as it   
   >> heats/cools , I'll probably use a piece of SS TIG filler for that .   
   >>   
   >>   I just realized that I can replace the carbide teeth on the face   
   >> mill that came with my milling machine . I tried to sharpen the   
   >> cutters on the lathe , turned out less than optimum . If I do that   
   >> I'll use the indexing device I built for sharpening end mills to   
   >> sharpen them . Might try that to even them up , might turn out I don't   
   >> need to replace them right away .   
   >>   
   >>  Thoughts on heat source and filler selections ?   
   >   
   > I don't know if regular brazing flux is going to do it, I use one   
   > intended for brazing tips and stainless steel as it is formulated to   
   > deal with the more tenacious oxides.   
   >   
      
      In a couple of the videos I watched they were using straight borax   
   ... I also have some flux intended for use with molten brass and aluminum .   
   --   
   Snag   
      I appreciated foreign cultures more   
   when they stayed foreign ...   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)