BriscoBones
Plastic
- Joined
- Mar 21, 2022
I'm having trouble thread milling on the first attempt. 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 am using a single-point thread mill, doing (mostly) "proprietary" threads.
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 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.
But this thread milling is kicking my butt! Usually need to adjust deeper and deeper cuts with the thread mill to get it to fit.
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.
Most of the time, by the time my threads fit, my minor diameter is completely out of spec.
Friday I cut my stock to my 1.4125 major, and my theoretical minor should have been between 1.3688" and 1.3571"
My first attempt was 1.36" minor, ended up having to cut all the way down to 1.34"
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.
Problem is, for my senior project, I have to cut 4 proprietary threads. That's a lot of test parts and work to make one part I may never have to make again.
TIA for any help on this one.
I am using a single-point thread mill, doing (mostly) "proprietary" threads.
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 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.
But this thread milling is kicking my butt! Usually need to adjust deeper and deeper cuts with the thread mill to get it to fit.
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.
Most of the time, by the time my threads fit, my minor diameter is completely out of spec.
Friday I cut my stock to my 1.4125 major, and my theoretical minor should have been between 1.3688" and 1.3571"
My first attempt was 1.36" minor, ended up having to cut all the way down to 1.34"
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.
Problem is, for my senior project, I have to cut 4 proprietary threads. That's a lot of test parts and work to make one part I may never have to make again.
TIA for any help on this one.