Here on half of the impeller blank is attached to the indexer. I am cutting eight blades and have marked every 10 divisions.

The cutter is a 4- 1/4 " bi-metal circle cutter. It is set to the right height and is feed into the blank at a steady speed.

The video is the cutter in action.

Two of these impellers are cut screwed together, this makes up the jet pumps impeller.