Half Round Style U-Joint
(Bearing Plate / Round Cap)

The u-joint series is specific to each cross measurement as described below based on the cap diameter and span over the crosses.  

RPL Style Cross

Cap Diameter:
When measuring the u-joint cap, measuring the bearing cap diameter. If you are measuring the end yoke, measure the width of the opening where the cap sits in the yoke.

Between Caps: 
When measuring the u-joint, compress the caps and measure from outside of bearing cap to outside of bearing cap. If measuring an end yoke, measure from the outside of ear to ear. 

Round Cap Style Cross 

Cap Diameter:
When measuring the u-joint cap, measuring the bearing cap diameter. If you are measuring the end yoke, measure the width of the opening where the cap sits in the yoke.

Width:
When measuring the u-joint, compress the caps and measure from outside of cap to outside of cap. If measuring an end yoke, measure from inside of tab to inside of tab.

 Half Round U-Joint Sizes and Series

We recommend using a caliper or micrometer to most accurately measure u-joints. U-joint caps must be compressed when measuring dimension over the caps. Once you have recorded your measurements, refer to the dimensional charts by u-joint type.