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What Is a Ball Joint Socket?

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  • Written By: B. Turner
  • Edited By: W. Everett
  • Last Modified Date: 06 November 2016
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    Conjecture Corporation
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A ball joint socket is a type of mechanical connection used in vehicles and other forms of machinery. This connection functions just like the ball-and-joint socket in the human hip. It consists of a round ball or bearing that swivels within a cup, or socket. The socket is small enough that the ball remains in place and doesn't fall out, yet large enough to allow the ball to swivel or rotate as needed. The ball socket joint combines strength with flexibility and shock absorption to help reduce wear in many mechanical applications.

To understand how the ball joint socket works, it's helpful to examine an application where this connection may be used. Many modern car makers use this type of joint to connect the wheels of a car to the axle. A bearing stud with a ball bearing tip extends out to each wheel. The ball bearing is surrounded by a socket, which has a rod attached to the other end. This rod connects to the car's axles, and also to the steering column.

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As drivers operate the vehicle, the ball joint socket allows the wheels to not only turn from side to side, but also to pass over bumps or potholes in the road. Without this joint, the car would suffer from a high degree of abuse each time it hit a pothole or other small obstacle. This joint helps to stabilize the vehicle as the wheels hit these obstacles to help reduce the shock felt by the driver. By absorbing shock, the ball joint socket also protects the vehicle and reduces wear and tear to car parts to help extend the vehicle's life.

A ball joint socket can also be found in many other types of vehicles and machinery. These connections are used in trucks and construction equipment, as well as many types of industrial and manufacturing equipment. They also play a critical role in steering and suspension systems for most modern passenger cars.

These joints come in two basic types, including sealed and unsealed units. Sealed units are pre-lubricated at the factory to reduce lifetime maintenance requirements. Unsealed ball joint sockets require routine care to help minimize friction between the ball and socket. If the joint becomes damaged beyond repair, it must be removed and replaced. This requires a special ball joint socket tool, which helps users applies proper force and torque to remove or reinsert the ball within the socket.

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