I’ve had a blade brazing kit for years but only used it
a few times because most of my band sawing ran to
straight cuts with wider blades that don’t easily break.
Looking at prices in the $22 ea. (plus shipping) range
for the 104” blades I need for my INCA band saw,
I decided to take a look at buying a coil and brazing
my own blades.
The good news is brazing is super easy. You do need
a fixture for holding the blade ends in relationship when
you apply heat. Other than that, scarfing blade stock
can be done with a file or with and angled block and
a grinding wheel mounted on a drill press. The scarfed
ends are fluxed and clamped with a 1/16” gap and
a piece of flat silver solder put in the gap. The flux
holds the solder in place. Then I wave a propane torch
over the ends of the blade and the solder makes
a nice joint.
The drawback is coils are generally only sold in 100’
or 250’ lengths so the cash outlay to get a coil is
more than the price of a couple of welded blades.
I bought an old stock coil on ebay. 1/4” x 6 TPI –
I’ll save a bundle as I work through the coil stock.