Universal Joints: Everything You Need to Know in 5 Minutes

Universal joints, universal coupling, or U-joints, are mechanical devices that allow two shafts to connect and rotate at different angles. They are commonly used in automotive, industrial, and agricultural applications.

What is a Universal Joint?

A universal joint is made up of two yokes and a cross. The yokes are connected to the shafts, and the cross is the rotating part that allows the shafts to move at different angles.

The cross is typically made of forged steel or cast iron. It is supported by bearings that allow it to rotate smoothly.

Why Would a Universal Joint Be Used?

Universal joints are used in applications where two shafts need to connect and rotate at different angles. This can be the case in a variety of situations, such as:

• In automotive applications, universal joints are used to connect the driveshaft to the wheels. This allows the wheels to turn at different angles as the vehicle travels over uneven terrain. For example, universal joints are used in four-wheel drive vehicles to allow the wheels to spin at different speeds when cornering or driving over rough terrain.
• In industrial applications, universal joints are used to connect rotating machinery to other components. For example, they can connect a conveyor belt drive to a motor.
• In agricultural applications, universal joints are used to connect implements to tractors. This allows the implements to move at different angles as the tractor travels over uneven terrain.

What are the Advantages of Universal Joints?

Universal joints offer several advantages over other types of shaft couplings. These include:

• They allow two shafts to connect and rotate at different angles. This is a valuable feature in a variety of applications.
• They are relatively simple and inexpensive to manufacture. This makes them a cost-effective option for many applications.
• They are relatively durable and can withstand a lot of wear and tear. This makes them a good choice for demanding applications.

Types of Universal Joints

There are two main types of universal joints:

• Cardan joints are the most common type of universal joint. They are simple and inexpensive to manufacture. However, they can be prone to vibration and wear.
• Rigid universal joints are more complex than cardan joints but are also more durable and vibration-resistant. They are typically used in high-performance applications.

Conclusion

Universal joints are a versatile and valuable tool that can be used in a variety of applications. If you need to connect two shafts that need to rotate at different angles, a universal joint is a good option to consider.

Source: Tien Yi Works Co., Ltd. / Belden Tools, Inc. / Wikipedia