In bearing installation, when bearing the inner diameter more than 70 mm, or interference with large, generally make use of the heating, make bearing hole expansion, this installation be saved effort saving time, also avoid the excessive force to damage the bearing etc.

At this time need to control the temperature of the heat, generally will heated to 80 ℃, up to 100 ℃ is enough. More than 120 ℃ is likely to lead to produce temper phenomenon, and the hardness and precision of the collar is reduced.

First, bearing heating commonly used methods:

1, bearing heating-electrothermal board heating:

As long as bearing placed in the temperature of 100 ℃ electrothermal board on a few minutes, and it is the most simple, if flip a few times can make the bearing is heated evenly, and higher efficiency, no matter bearings size can be using this method to heat.

2, bearing heating-electric furnace heating:

The bearing in place of automatic temperature control of the closed within the electric heating, this kind of method heating even, and the accurate control temperature , and heating quickly, apply to a group of heating a lot of bearings occasion.

3, bearing heating-induction heating:

This method using induction heater can fast, reliable and clean the bearing heating to the required temperature, this kind of method is especially suitable for the inner circle of a tight fit occasions, but also because of the heated just inside the turn, and the outer ring is little heated so that they can more easily installed in the axis, also easily loaded into a hole .

4, bearing heating-light bulb heating:

This method is to use the electric light bulb 50 W to heat bearing, can guarantee the heating temperature about 100 ℃ , for smaller bearing can be directly on the light bulb, the bigger bearing can be placed in the cone light bulb enclosure, tapered cover is can prevent light bulb heat loss, and make the heating very evenly. Tapered cover up and down can be level, in a certain range can adapt to heating different size  the bearings. If the light bulb is far infrared, attention should be paid to the direction of the light bulb should be down, in order to avoid the infrared radiation damage to human eyes. This light bulb is the energy saving . Light bulb heating is applicable to the small number and often do not to bearing heating occasions, usually cases bulb also can be used as lighting, moreover does not need any other equipment.

5, bearing heating-oil heating:

 
This method is a wider application of traditional heating method, from the bottom groove in 50 to 70 mm Settings metal nets, bearing is in online, big bearing also with hooks hanging. Bearing is not suitable for direct put on the bottom, to prevent contact groove bottom of the bearing part of local heat temperature is too high, or groove bottom dirt into the precipitation in bearing. With the attention of heating oil points as follows: should use no corrosive heat stability good mineral oil, it is better to use transformer oil, oil and containers should keep a good clean. The capacity of the tank with heated bearing with the size of the oil amount and decide, if the container is too small , in continuous operation, the oil temperature in bearing a quick decline, the effect will be bad.
 



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