Final answer:
A recirculating ball type steering gear is an older steering system design that uses ball bearings to reduce friction and ease the steering process. It includes a worm gear and a sector gear and is known for its durability and high mechanical advantage, though it is less precise than modern steering systems.
Step-by-step explanation:
The recirculating ball type steering gear is a type of steering mechanism commonly used in older automobiles and some off-road vehicles. This system utilizes a set of ball bearings that recirculate within the steering box. Its main components include a worm gear and a sector gear, which has a series of channels filled with ball bearings. When the steering wheel is turned, the rotation of the worm gear moves the ball bearings which, in turn, causes the sector gear to pivot. This pivoting motion is transferred through the steering linkage to the wheels, causing them to turn and steer the vehicle.
One of the advantages of the recirculating ball mechanism is its high mechanical advantage, which allows for easy maneuvering of heavy vehicles with less effort on the steering wheel. Additionally, the ball bearings help reduce friction and wear on the gears, which contributes to the durability and longevity of the system. However, compared to modern rack and pinion steering systems, recirculating ball steering can be less precise and require more maintenance.