Another project I am working on are some tensile specimens for my department here at school. I need to make about 250 of them. I know how to set up and run the machine (Gildemiester CTX 410 with less than 20 hours on it) However, I don't know much about turning steel. Basically I am just looking for some speeds and feeds.
The parts are 7" long, 3/4" diameter and is a dogbone with the center being 2" wide at 1/2" diameter with .375" radii bringing it back out to the stock dimension. I am running a 50 someodd degree neutral tool for roughing and a 35 degree for finishing. Though have toyed with the idea of just running the 50 degree one and saving the tool change even though the machine changed tools in the blink of an eye. I find my finises to be better with the separate finishing tool.
I am getting stringy curly chips. Should I push it harder. Or just take it easy.
DOC and Feeds and Spindle speeds would be greatly appreciated to see if I am in the right ball park.