Ball bearing and roller bearing selection method: 1, the current automobile bearing market has two camps, one is the most widely used roller bearings (such as products from Huizhong), and the other is double row angular contact ball bearings (Such as SKF, FAG) and many other foreign companies bearing the production of automotive bearings. 2, In fact, the majority of foreign automotive bearings are mainly double row angular contact ball bearings, and the majority of the domestic use of roller bearings, the most fundamental reason is that after Volkswagen entered the Chinese market, I found that the domestic road conditions are not good, affecting Bearing life, only to choose a roller bearing. 3, then what is a good ball bearings? Or roller bearings good? We analyze their advantages and disadvantages: 1) ball bearings, starting friction coefficient, high speed and stable, flexible steering. The disadvantage is impatience impact, not suitable for complex road conditions. 2) Roller bearings, bearing load line contact (different from the ball bearing point contact), impact resistance, road adaptability. Therefore, there is a public car running world reputation. But it is obvious that the start-up and the sense of hysteresis caused by taxiing inevitably make people now more pay attention to manipulative feeling dissatisfied. There is an increase in fuel consumption, although these are difficult to detect the situation. 4, it is recommended that in some large and medium-sized cities in China, the road conditions can make people use ball bearings. But note that the choice of ball bearings must use forged bearings.