From: Fred Martin (mung@in-touch.net)
Date: Thu Jul 10 2003 - 06:32:56 PDT
I have done the metalizing thing...the one I have is a Metco outfit...it
runs on acetylene and oxygen (like a torch) and compressed air. The
metal...in the form of wire is run through a turbine (variable speed)
and the torch melts it and flings it onto the metal being built up. The
big thing about this type of metalizing is...the temperature of the
parent metal doesn't get over probably 300-400 degrees F. The surface of
the parent metal has to be prepared properly, clean and dry with a
knurling type tool to rough up the shaft for better holding power. I
once built up the face of an aluminum flywheel with stainless steel. The
owner run it in a stock car. I saw him later and asked him how it
done...he said that it was doing just fine...and when he missed a
gear...it turned 7000 to 8000 rpm. It should be done in an old
lathe...covering all machined surfaces...cause the metal goes
everywhere. Fred Martin
L51940@aol.com wrote:
> Sorry to here about David Wright losing his job. Although I have never had the pleasure of doing business w/ him, his contributions to the list show that he is an honorable man. Maybe that attribute rocked the boat at GL.
>
> We are mechanical contractors and a lot of bigger, older air handlers have blower shafts that are very specific to the machine. They generally require a lot of lead time to get a new one. We usually get to see these shafts when one of the bearings has plowed a big groove in it. The customer is hot (or cold) and needs it fixed now. We send these out to a company that welds up the grooves and machines the bearing surfaces back to size. I believe that for lesser worn surfaces they metalizes it. Basically they spray on metal and then machine that. Someone on the list may have first hand knowledge about metalizing.
>
> Dave McConnell
>
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