Part No. 2-28-2977 Ball Stud Yokes, 1310 Series, Ball Stud Length Dia 0.500X0.594, Notes

Ball stud yokes are the precision interface component in double-cardan constant-velocity assemblies. The 2-28-2977 is engineered for 1310 series applications with a ball stud diameter and length specification -- 0.500X0.594 -- that ensures proper centering socket engagement under dynamic loading without binding or excessive play.

Specifications

The Role of the Ball Stud in CV Joint Systems

A double-Cardan constant-velocity joint achieves velocity cancellation through the precise bisecting action of a centering socket. The socket rides on the ball stud -- part of the input-side yoke -- and holds the joint's midpoint exactly at half the total operating angle. If the ball stud diameter is worn or the geometry is incorrect, the socket drifts from the true bisect angle, and the velocity error that the double-joint design is meant to eliminate reappears as vibration at twice the shaft rotation frequency.

The 2-28-2977 maintains the ball stud dimensions to the 1310 series OEM specification, ensuring the centering socket function operates correctly throughout the joint's service life.

Diagnosis and Replacement

Ball stud wear is often overlooked during U-joint replacement because the bearing crosses are the more visible wear point. However, the centering socket and ball stud should be inspected whenever U-joints are replaced in a double-Cardan assembly. Symptoms of ball stud wear include:

• Vibration at low speeds that was absent when the shaft was new
• Vibration that returns shortly after U-joint replacement
• Audible clunk when shifting from drive to reverse at low speed
• Visible side-to-side play in the CV joint assembly when the shaft is stationary

If dust cover rubber is specified for this application, ensure it is replaced along with the yoke to prevent contamination of the centering socket from road grit and moisture.

Universal Driveshafts -- Driveline Parts Specialists

We stock a complete range of 1310 series ball stud yokes for rapid turnaround on CV joint repairs and custom shaft builds. The 2-28-2977 is available for immediate shipment. Our technical staff can assist with cross-referencing to OEM part numbers and confirming the correct centering socket for your specific assembly.