The worm gearbox takes advantage of a big diameter heat wheel. A worm or screw meshes with enamel to the outer circumference with the gearbox. Of course it could possibly run. The gear box is useful for various speed and torque. Along with the cvt does the same thing. https://gearbox74296.full-design.com/the-smart-trick-of-gearbox-that-nobody-is-discussing-76202715