Recirculating ball, also known as recirculating ball and nut or worm and sector, is a steering mechanism commonly found in older automobiles, off-road vehicles, and some trucks.

A nut is meshed with and screws up and down on the worm gear. The nut may operate the pitman arm directly through a lever or through a sector on the pitman arm shaft. Figure 8-22.

During the '50s, '60s, '70s and through the early '80s many other vehicle manufacturers adopted the design and it is commonly called the recirculating ball nut type steering gear. In this type of steering gear, the end of the worm shaft is machined with a continuous helical groove.

Jan 27, 2021 · Worm and Nut Steering Gear Box: Worm and Nut Steering Gear Box is a type of gear box that acts as a bolt and nut system. As we know that the bolt consists of external threading and the nut consists of internal threading; the bolt is inserted in to nut and tightened.

Worm and Sector Type: In this type the worm on the end of the steering shaft meshes with a sector mounted on a sector shaft. When the worm is rotated by rotation of the steering wheel, the sector also turn rotating the sector shaft.

The recirculating ball is the most common type of worm and nut steering gear (fig. 8-23). In this steering gear, the nut, which is in the form of a sleeve block, is mounted on a continuous row of balls on the worm gear to reduce friction .

Mar 26, 2024 · In the worm and ball bearing nut steering gear, a ball nut is mounted on the worm of the steering shaft. The worm and the nut have mating spiral grooves in which steel balls circulate to provide a frictionless drive between the worm and nut.

Jul 1, 2022 · The portion which is having the spiral groove of the shaft is known as the worm and the part which is having the internal spiral grooves is called half nut. The half nut has an extended tower that is made up of spigot pin and a conical seat.

Aug 9, 2019 · Worm and sector steering gear diagram. This steering gear consists of case-hardened steel worm and sector; both supported by bearings. Its casting is made from malleable iron or light alloy. The worm connects to the steering shaft while the sector forms a …

Jul 26, 2019 · The recirculating ball nut steering gear is an improved form of worm & nut mechanism. It has a nut with steel balls acting as threads which provide higher mechanical efficiency of 90%. The recirculating ball mechanism has a …