Roll's custom optimization reshapes the raceways on the left, that both slide and roll, to create pure rolling on the right.
The rollers slide against the raceway as they travel — the sliding that sheds energy as friction and heat, and wears the surfaces.
Roll's custom numeric methods curve the raceways to eliminate sliding, just pure rolling.
Animations are kinematic simulations of the rolling interface. Efficiency figures quoted elsewhere on this site are targets, pending physical validation.
Let's put rolling to work