https://www.emag.com/es/products-services/machines/gear-cutting-machines/gear-grinding-machines/gear-profile-grinding-machines/gp-500-h/
Gear Profile Grinding GP 500 H - EMAG SU
The GP 500 H is a profile grinding machine that mounts an additional NC axis, allowing you to work with two separate spindles instead of just one.
gear profilegrindingemag
https://wildlifedirect.org/history/crew-profile-with-gear-2-2/
crew profile with gear 2 - wildlifedirect
crewprofilegearwildlifedirect