A gear sector is meshed with the worm gear; rotation of the worm gear causes the gear sector to rotate.
The gear sector of variable transmission ratio in automobile steering mechanism is a variable module non-circular gear.
"The gear sector, toothed roller, or stud meshes with the worm."
"Essentially, the steering gear consists of two parts, a worm on the end of the steering shaft and a pitmanarm shaft on which there is a gear sector, toothed roller, or stud."
"It consists of steering wheel, steering shaft, worm, gear sector, pitman arm drag link, steering knuckle arm, king pin, steering arms, tie rod, front axle and steering knuckle."
