Unlike ball bearings, roller bearings have cylindrical rolling elements, which are particularly suitable for higher loads at relatively lower rotational speeds. The rollers provide a larger contact surface between the rolling element surface and the raceway than in the case of ball bearings. Because of this, the force transferred per unit area compared to a ball bearing decreases, resulting in higher load ratings. In turn, rollers have different rolling characteristics than balls. The increased warming due to the larger contact surface between the rolling element and the raceway especially limits the maximum rotational speed of roller bearings.