It is ok to use a sharp vee tool unless you are cutting a controlled root radius thread like a J series thread. I'll bet your trouble is the single point tool you are thread milling with has a truncation that does not match the spec for the thread pitch. That's a lot of test parts and work to make one part I may never have to make again. ![]() Problem is, for my senior project, I have to cut 4 proprietary threads. ![]() My brother (who owns a machine shop out of state), argues the point of thread milling, is to experiment/run tests until you find a recipe that works and just re-use that recipe. My first attempt was 1.36" minor, ended up having to cut all the way down to 1.34" Most of the time, by the time my threads fit, my minor diameter is completely out of spec.įriday I cut my stock to my 1.4125 major, and my theoretical minor should have been between 1.3688" and 1.3571" I draw my part to my major diameter, and under my cut parameters I override my geometry and set it to cut to my minor. ![]() I use theoretical machinist to get my cut specs, and on a manual lathe (or on our cnc lathe), I can cut threads with no issue.īut this thread milling is kicking my butt! Usually need to adjust deeper and deeper cuts with the thread mill to get it to fit. ![]() Using Mastercam 2021, I am a student and neither of my instructors has ever used a thread mill, so I have basically taught myself. I am using a single-point thread mill, doing (mostly) "proprietary" threads. Threads cut fine, but every time I have to cut a new thread size, it takes me a few attempts to get it to fit. I'm having trouble thread milling on the first attempt.
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