Question 86General Subjects - QMED

The correct answer is C) They have a greater contact area. Roller bearings have higher loading capacities than ball bearings because they have a greater contact area between the bearing components. The cylindrical shape of roller bearings allows for more surface area to distribute the load, compared to the point contact of ball bearings. This increased contact area enables roller bearings to support heavier loads without exceeding their fatigue life. The other answer choices are incorrect because they do not directly address the key reason for the higher load capacity of roller bearings. While they may be true in some cases, they do not provide the primary explanation for the superior load-bearing capacity of roller bearings.