On Wed, 10 May 2023 15:33:10 -0500, Snag wrote:

Or anyone else with pertinent information ...
Did I see you post something a while back about brazing carbide ? I
have some brazed boring bars (for my boring head) that are chewed up ,
and a stash of high quality solid carbide router bits ...
I have regular brazing rod with and without flux , regular brazing
flux , and phosphor bronze TIG filler .

The method I used ~40 years when I did this on a semi-regular basis on
large lathe bits used for roughing forgings:

Heat end of tool to melt braze. I used O/A back then but today I would use
my turbo-torch with a 5 or 6 tip, and flip out the old insert. Allow to
cool, coat the insert socket with brazing flux, place ~.002" brass shim
stock cut to fit, coat insert with flux and place on shim stock, heat
slowly to dry out and melt flux then heat rapidly from the bottom of the
tool not directly on carbide until brass melts and flows.

This worked really well using 3/4" square ~3/16" thick inserts made for
use in brazed tools, not sure if it will work with all grades of carbide.

Glen

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)