Roughing without a roughing endmill?

Had a little suprise when roughing out some stainless steel (1.4305) parts.

The endmill used:
https://www.hoffmann-group.com/DE/de/hom/Monozerspanung/VHM-Fr%C3%A4ser/VHM-Fr%C3%A4ser-DIN-6535-HB-TiAlN-3-mm-HOLEX/p/202220-6

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Видео Roughing without a roughing endmill? канала Stefan Gotteswinter