01-31-2014, 09:14 PM
Darren,
I got the bronze in exchange for some milling cutters and inserts I don't use, so materials aren't going to cost you anything. Big relief! Two pieces Ø 3" x about 5" long of 660 bronze. It's enough that if I screw up the first attempt I have enough for a second try. Fits on ACME threads are always the toughest because you go from "a little too snug" to "like a baseball bat down a hallway" in short order.
Tooling for the O.D. threads should be no problem. For the I.D. thread, I may have to...wait for it....use a ground HSS tool in a homemade boring bar I have. It's such a course thread with a high helix angle, so I don't yet know if any off-the-shelf insert tooling will fit in there.
And yes, that tool post shaft was the only piece of the 12' bar of 1117 I've used yet. It machines easily and is an excellent match for the 660 bronze nut. Little to no chance of them binding together,
I got the bronze in exchange for some milling cutters and inserts I don't use, so materials aren't going to cost you anything. Big relief! Two pieces Ø 3" x about 5" long of 660 bronze. It's enough that if I screw up the first attempt I have enough for a second try. Fits on ACME threads are always the toughest because you go from "a little too snug" to "like a baseball bat down a hallway" in short order.
Tooling for the O.D. threads should be no problem. For the I.D. thread, I may have to...wait for it....use a ground HSS tool in a homemade boring bar I have. It's such a course thread with a high helix angle, so I don't yet know if any off-the-shelf insert tooling will fit in there.
And yes, that tool post shaft was the only piece of the 12' bar of 1117 I've used yet. It machines easily and is an excellent match for the 660 bronze nut. Little to no chance of them binding together,