Hi I need to braze a replacement steel pinion onto a hollow cast iron shaft. The
pinion is now ground/machined off & the new one a smooth push fit on. I am not sure if the shaft & pinion were once one casting or that the latter was heated & interference fitted (shrunk) on, as there have been past attempts to let teeth in. Casting of pinion had a bad area from start (honeycombed) Really need to know what braze rod & flux to use. It is only a back gear drive on an old lathe. I only have here a 'carbon arc brazing torch' twin carbons that strike an arc between them. Thinking of getting someone with oxy propane to do it but above question still applies (I have some borax & also some sifbronze I acquired over the years) I do not want my set up to add yet more carbon to the iron. Have read much on here, would say it is a capillary action job rather than brazing a rough break. Thanks for any advice
pinion is now ground/machined off & the new one a smooth push fit on. I am not sure if the shaft & pinion were once one casting or that the latter was heated & interference fitted (shrunk) on, as there have been past attempts to let teeth in. Casting of pinion had a bad area from start (honeycombed) Really need to know what braze rod & flux to use. It is only a back gear drive on an old lathe. I only have here a 'carbon arc brazing torch' twin carbons that strike an arc between them. Thinking of getting someone with oxy propane to do it but above question still applies (I have some borax & also some sifbronze I acquired over the years) I do not want my set up to add yet more carbon to the iron. Have read much on here, would say it is a capillary action job rather than brazing a rough break. Thanks for any advice