A blender? Isn't it called meatball beater? The two are different in nature. It is generally not recommended to use a meatball beater at home, because a family can't eat so many meatballs. This meatball equipment is commercially available. If yours is commercial, you can try the Xu Zhong meatball machine.
Do you want it at home or do it honestly by hand. Hmm. How interesting