Can you have them water jet to remove the flamecut? Highfeed cutter would be my next thought.

Conventional mill cut with a deep enough radial cut to get under the scale. Climb will go through a lot of tools

Bump. Good topic for anyone learning Mastercam so hopefully others can benefit from the work of John and myself from this topic.

Awesome Ron! I can't begin to thank you enough for this. I can guaranty I'll be using what I learn from this often. We don't make impellers, but the paths and settings here I can use in many other applications. Kudos to you sir.

Okay took a little bit of work and I didn't use the new Swarf I reverted back to the old school swarf. I also used the Verisurf Tool to convert the Swarf splines into new splines that are constant nodes of 200 nodes. I used Nodes as the Sync process in the chains for the Swarf toolpaths. I also added Transform Operations to help those that struggle with them and how to machine a part effectively using them. File is about 60mb. 5th Axis Impeller in Mastercam 2020 Hopefully this will be a help to others and it is Mastercam 2020. No I will not convert it backwards to a previous version. If I can stay current then your company should be able to also.