I've used the "pencil tip" bernz-o-matic for silver and lower
temp 14k solders, never tried to cast with it, but for
soldering and annealing it works OK. I put a little tape
around some of the air holes at the base of the tip to
slightly oxygen deprive the flame, and always use boric acid
Hi Ben, Hmmmm, the very first torch I purchased was the pencil tip
Bernz-o- Matic . . . I still have it, but never use it. It
wouldn’t solder worth spit! My pieces are at least 1" x 1/4" and
this torch couldn’t heat the silver to the point of flow. I wish
it had . . .
My next purchase was the propane “silversmiths torch” which is
found in many catalogs. That one worked OK, but I still
encountered problems soldering larger pieces. It worked fine when
making silver chain. I, sometimes, still use it for that. But,
why waste money if one doesn’t have to!?!? Sterling silver MUST be
heated thoroughly before solder will flow. Gold, on the other hand
does not so “spot” heat will work when working with it.
BTW, what sort of metal are you working with???
Have a nice weekend!!!