1999-2004 CONCORDE 1998-2004 DODGE INTREPID 1998-2004 LHS 1999-2004 LHS 1. The plane bearing is composed of a row of steel balls (with the cage), a shaft ring (with the shaft) and a seat ring (with the shaft gap and with the bearing seat hole). The ball rotates between the shaft ring and the seat ring. It can only bear axial load in one direction, but not radial load. Because the axial load is evenly distributed on each ball, the load capacity is larger. But when working, the temperature rise is larger and the allowable limit speed is lower. 2. The advantage of plane bearing is that the choice of high-precision cylindrical roller (needle roller) increases the contact length, so that the bearing can obtain high load capacity and high stiffness in a small space; Another advantage is that if adjacent parts surface suitable for raceway surface can be eliminated gasket, can make the design compact, DF plane needle roller bearings and flat cylindrical roller bearings using needle roller and cylindrical roller cylinder surface for the modification surface, can reduce the edge stress, improve the service life. 3. The plane bearing plays the role of shock absorption and movable link of the car body on the car to avoid direct friction between the shafts.