Making Boring Bars..

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I have a pile of tubes that I had welded up the bores and now they need re-boring..Tubes..But the boring bar that I have is rather LARGE..So I fabbed up a nice small one for my "collection"..Here are the parts..Make sure you put the chipbreaker in first before you weld it..It can be tough to do if you don't..OK now shim it up so it's in the middle..Now weld it..BUT!!..you have to do it fast because you dont want the silver solder that holds the carbide to the bit to melt.. And we continue next post.....zap! Attached ImagesLast edited by zapster; 05-02-2007 at 05:36 PM.I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Oops..sorry about the double pic above..  Well here's the bottom..Now its showtime!!The chips are flying!!..Ahhhh a nice finish bore within 4 tenths of the dimention.. And there we have it!I get all the fun jobs... ...zap! Attached ImagesI am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:We make a lot of custom tooling.... it's a nice thing to be able to do that when it's needed._________________Chris
Reply:ZAP, Is that just a carbide lathe bit. What size is it. Nice.Thanks.    T.J.
Reply:Originally Posted by TJSZAP, Is that just a carbide lathe bit. What size is it. Nice.Thanks.    T.J.
Reply:Very nice - make your own tools. I like it !John -  fabricator extraordinaire, car nut!-  bleeding Miller blue! http://www.weldfabzone.com
Reply:Nice work Zap,  Just an idea I came up with, but I made two of my boring bars, by taking a piece of shaft and drilling a 3/8" hole thru one end of it.  Then I took a piece of 3/8" square cold roll and grind a taper on one end of it.  Then I heat the boring bar material red hot around the hole, and drive the 3/8"cr thru the hole to form a square hole thru it to accept the tool bit. ( I filed one hole square but found this was easier and quicker)  Then I drill and tap for a set screw to hold the tool bit wen boring.  That way I can replace them when i need to.  Again Great work. . .~JacksonI'm a Lover, Fighter, Wild horse Rider, and a pretty good welding man......