1. Fatigue life, wear life and lubrication life

Fatigue life: Under normal conditions, the internal screw thread rod end bearing is fully lubricated, and the bearing is invalidated due to fatigue flake, which is called fatigue life.

Wear life: The internal screw thread rod end bearing has high stiffness and large size. Before reaching the fatigue limit, the period of time that cannot be used due to wear is known as the wear life.

Lubrication life: After a primary lubrication, when the lubrication function disappears and problems occur, this period of time is called lubrication life. So, it is related to the life of the grease.

2. Model selection

The model selection of the internal screw thread rod end bearing is the first to determine the bearing size, mainly considering the bearing load size, load capacity, and the expected service life. Then determine the size and specific model.