The self-aligning roller bearing preload is carried out at room temperature, but in the working state, the system micro tensile temperature rise generated by the drive shaft, bearing preload will change, therefore, the setting of preload, should take into account this factor.

It requires the capacity for size, speed, and other conditions to set the reasonable use of self-alenting roller bearings with preload to ensure transmission life. If the preload is too large, power consumption, and even lead to overheating. If the preload force is too small, the body load, the shaft rolling, the gap between the outer ring under the action of the jump, run, transmission accuracy, to reduce the noise increase, affect the gear meshing, serious damage when the teeth and bearings.

According to different self-aligning roller bearing assembly, such as: directly by axial compression inner bearing inner ring bearing preload nut rotation, inner and outer ring to eliminate the gap, to achieve the purpose of bearing preload. Achieve common use: first, far more than the preloaded bearing, the last nut, then back 1/4 turn. Assembly method, the advantages of this method is less investment, simple, practical, consistent under the premise of excellent quality tapered roller bearings, it can be used.

1. The heating method of the electric heating plate will place the bearing on the electric heating plate with the temperature of 100℃ for a few minutes. This method is the most convenient, such as turning over several times can make the bearing heated evenly, and the efficiency is also high.

2. Electric furnace heating method will be placed in the closed automatic temperature control electric furnace heating, heating evenly, accurate temperature control, heating fast, suitable for a batch of heating many bearings.

3. Induction heating method using induction heater can be fast, reliable and clean to the self-allot roller bearing heating to the required temperature, this is especially suitable for the occasion of the inner ring with tight, because the inner ring is heated only, and the outer ring is heated very little, it can be more easily installed on the shaft, but also easy to load in the seat hole.

4. Light bulb heating Use of 50 w bulb heating spherical roller bearings, can guarantee the heating temperature about 100 ℃, the smaller the bearing can be directly on the bulb, larger bearings taper enclosure may be placed on a light bulb, conical cover can prevent heat losses, light bulbs and uniform heating cone cover can be adjusted up and down, in a certain heating range that can adapt to different size of bearing if using infrared light bulbs, pay attention to The light bulb should be pointed downwards, so as not to harm the eyes of the infrared rays. This kind of light bulb can save energy. To the occasion of bearing heating, usually the bulb can also be used for lighting, in addition to the need for any other equipment.

5. Oil tank heating method This is a widely used traditional heating method, the bottom of the tank from 50 to 70 mm in a metal mesh, bearing on the Internet, large bearing to hoist hooks in the bearing should not be placed directly on the bottom of the channel, in case of contact with the bottom of the channel bearing parts of the local heat is too high, or the bottom of the channel to precipitate the dirt into the bearing oil tank heating attention points as follows, no corrosive thermal stability good mineral oil, should be used the most It is better to keep transformer oil, oil and container clean. The capacity of the oil tank should be determined by the size and oil amount of the heated self-aligning roller bearing. If the container is too small, the temperature of the bearing oil will drop quickly when it is put into continuous operation, and the effect is not good