Universal Joints

Nov. 15, 2002
Universal joints, or U-joints, are used to join shafts that must intersect at angles greater than those that can be accommodated by flexible couplings.

Universal joints, or U-joints, are used to join shafts that must intersect at angles greater than those that can be accommodated by flexible couplings. They are generally classified by their motion transmission characteristic, which can be either constant velocity, nonconstant velocity, or near-constant velocity. U-joints can also be classified by their application: automotive, industrial, or mechanism.

U-joints fall into three categories:Automotive U-joints: Used for wheel drive shafts on cars, trucks, and off-highway vehicles, such as tractors, and earth-moving equipment.

Industrial U-joints: Used on vertical pumps, test stands, main rolling-mill drives and auxiliary equipment. Available in diameters to 40 in. capable of 15° misalignment, with torques to 15 million lb-in.

Mechanism U-joints: Used for cranking, steering, and others. Available from fractional to several hundred horsepower. Misalignments, 40° on a single unit and 80° on double units.

Sponsored Recommendations

June 27, 2025
Ensure workplace safety and compliance with our comprehensive Lockout/Tagout (LOTO) Safety Training course. Learn critical procedures to prevent serious injuries.
June 27, 2025
Join our expert webinar to discover essential safety control measures and best practices for engineering a truly safe and compliant industrial environment.
June 25, 2025
An innovative aircraft with electric drives combines the best of both worlds. The cross between drone and helicopter could mean significantly faster and more efficient air emergency...
June 25, 2025
Effective when other materials fail, ceramics are particularly suitable for applications requiring wear and chemical resistance, sliding characteristics or biocompatibility. Discover...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!