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, Distinguished Corporate Fellow, Director of Corporate Technology

Preliminary Design Considerations of Zero Reaction Stages in Turbines

Preliminary Design Considerations of Zero Reaction Stages in Turbines

By Oleg Dubitsky, Distinguished Corporate Fellow, Director of Corporate Technology
Aug 27, 2021

Low reaction stages are often used as control stages of steam turbines, ORC turbines, drive and rocket turbopump turbines. Some of the benefits of low reaction stages vs higher reaction stages are:

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