So have you fully unscrewed the cups? They should come off completely and the bearings+axle should then have room to slide out. If stuck then I'd encourage forgivingly with a rubber mallet or a wood block.
How can I unscrew the cups? The pinholes open up the cup but don't unscrew anything and there is nothing to hold onto to unscrew besides a rag and spanner but you understand my hesitation regarding damaging threads
So have you fully unscrewed the cups? They should come off completely and the bearings+axle should then have room to slide out. If stuck then I'd encourage forgivingly with a rubber mallet or a wood block.