On 23.09.16 01:02, Gene Heskett wrote: > So what I am looking for is a bb holder that will work with the smallest > QC holder. And will hold it solidly in the face of a 1 horse motor's > solid torque.
My long boring bars have flats top and bottom, so they just go into the 4-way toolpost like the square TCT holders, with the 3 hex-socket screws squeezing them firmly in place. Only the sides are rounded. When a small boring bar was needed, I axially drilled a length of square Al, cut a slit in one side, pushed in a small end mill, squished it all tight under the aforementioned toolpost screws ( with slot and one end-mill tooth horizontal), and bored away. (The softer Al probably grips better than steel would.) The cutting tooth is small, and the holding area is proportionally enormous. The screws were reasonably tight. The end mill was sharp. There was no slip while making several bushes. Gene, is that Al bar a machinable alloy (i.e. at least a bit of Cu in it), or plain toffee? That stuff can be a drag. Erik ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
