SpinOffs

A blog on what's new, notable, and next in turbomachinery

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Calculating Surface Roughness and Cusp Height for Ball End Mills

By Ryan Lussier, Senior CAM Software Product Manager
Aug 20, 2026

Imagine you're finishing an impeller blade with a ball end mill. The drawing calls for a specific surface finish, but now you need to determine the toolpath parameters that will achieve it. Should...

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Calculating Surface Roughness and Cusp Height for Ball End Mills

Oleg Dubitsky, Corporate Fellow, Director of Corporate Technology

Design Considerations for Turbo Expander Supersonic Turbines with Liquid to Gas-Liquid Flow Transition

Design Considerations for Turbo Expander Supersonic Turbines with Liquid to Gas-Liquid Flow Transition

By Oleg Dubitsky, Corporate Fellow, Director of Corporate Technology
Sep 28, 2020

A small turbine (for ORC, air liquification processes) , operating with low volumetric flows at inlet and significant pressure ratio in a single stage configuration (to reduce costs) is often...

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