Use a Lathe Rough toolpath. Keep your "Depth of Cut" conservative based on your material (Steel vs. Aluminum).
If you’re a SOLIDWORKS user, you already know the power of your design environment. But when it’s time to move to the lathe, you don't want to export files and lose your associativity. That’s where the Mastercam for SOLIDWORKS (MCfSW) add-in comes in. Mastercam 2017 for SOLIDWORKS Tutorial (Lathe)
Moving from CAD design to actual chips on the floor can be a bit intimidating, but the Mastercam integration for SOLIDWORKS makes it about as seamless as it gets. Use a Lathe Rough toolpath
Once the bulk of the material is gone, use Lathe Finish . This will use a smaller tool (like a 35-degree DNMG) to follow the exact contour of your SOLIDWORKS geometry. 5. Parting Off The most nerve-wracking part of any lathe job! Select the Lathe Cutoff toolpath. Choose your parting tool width carefully. If you’re a SOLIDWORKS user, you already know
You can’t cut air (well, you can, but it’s not productive).