Oil-free bearing hardness, due to overheating and have to worry about, therefore, absolutely can not exceed 100 degrees. At this point, the bearings must use the wire to hang, or placed in the wire rope, supporting the board above, do not place in the bottom of the tank. When the bearing reaches the desired temperature (below 100 degrees), it should be removed from the tank immediately, quickly into the shaft, the bearing will shrink with the temperature drop, sometimes between the shoulder and bearing face, will produce a gap, Use the tool to press the bearing in the axial direction.