A rod end is a joint that maintains a fixed point of contact between two parts with some degree of rotational freedom about all three axes. Rod ends have two main parts, each with a shaft or hole for attaching other parts. The two parts are arranged so that the axes of the shaft or bore are nominally perpendicular to each other, and both axes pass through the center of rotation of the ball joint.

Here is the content list:

• Rod ends and Ball joints

• Rod ends the introduction and application

• What is the difference between externally threaded and internally threaded rod ends？
  

Rod ends and Ball joints

The rod end usually has a flat hole through the center of the ball joint and protrudes from the housing around the ball joint. The protrusion may be a shaft, usually threaded, in which case the rod end may be described as "externally threaded". Alternatively, the protrusion may be a rod containing a threaded hole, which may be described as a "female" rod end. The protrusion usually has a hexagonal cross-section or two parallel flats sized to fit a standard-size wrench and is designed to facilitate tightening a screw or locknut.

Ball joints have mounting axes that are nominally perpendicular to each other, much like the rod ends. They differ in that the inner sphere does not have a hole through its center. In contrast, a ball joint has a shaft protruding from an inner ball or sphere.

Rod ends the introduction and application

Rod ends consist of an eye-shaped head with an integral shank that acts as a housing for a spherical plain bearing or bushing. They are used in connecting rod applications where the bearing must support significant misalignment. Rod ends are commonly used in the automotive and aerospace industries, but they are also found in a wide range of industrial machinery.

The working principle of the automobile steering system is that the steering wheel drives the steering shaft to rotate, and the rotational motion of the steering shaft is transformed into a linear motion by the steering gear, which drives the steering tie rod to move. The tie rod pulls the steering knuckle arm, and the steering wheel is driven by the steering knuckle to realize the steering function of the vehicle. Rod ends joint bearing is an important connection between the steering tie rod and the steering knuckle arm of the car and is also one of the key components in the steering system of the car. The strength and reliability of ball joint rod ends are directly related to the stability of vehicle handling, ride comfort, comfort, and safety.

What is the difference between externally threaded and internally threaded rod ends?

The threads on the rod end determine whether it is male or female. Rod ends with external threads are externally threaded configurations, while rod ends with internal threads are internally threaded configurations. Internally threaded rod ends are often used in unique applications because of their ability to fine-tune component placement. For example, internally threaded rod ends are often used in helicopters to precisely adjust the orientation of the blades.

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