When the inner diameter of the bearing is greater than 70mm, or interference with the larger, heating method using a thermal expansion of the bearing hole, so installation time-saving, but also to avoid bearing damage due to excessive force caused.

Then the need to control the heating temperature, generally bearing heated to 80 ℃, maximum 100 ℃ enough. Exceeds 120 ℃ will cause bearing tempering phenomenon occurs, resulting in reduced ring stiffness and loss of accuracy. Conventional heating methods are:

1, Electric heating plate

The bearing is placed at a temperature of 100 ℃ for a few minutes on a hot plate, this method is the most simple, such as flipping a few of bearing heat evenly, and the efficiency is high, the size of the bearing can use the same method.

2, Electric heating

The automatic temperature control electric heating within the bearing placed in a closed, uniform heating, temperature control is accurate, fast heating, suitable for heating a number of bearing many occasions.

3, Induction heating method

An induction heater can quickly, reliably and cleanly heated to the desired temperature of the bearing, which is particularly suited to the tight fit of the inner case, since only the heated inner ring, an outer ring and little heat, so you can easily mounted on the shaft, but also easy to mount the housing bore.

4, Electric heating lamp

Use 50W light bulb heating bearings, ensures the heating temperature is about 100 ℃, smaller bearings can be placed directly on the bulb, the bulb can be placed in a larger bearing tapered hood, tapered hood bulb can prevent heat loss, and uniform heating. Cone bits can be transferred under cover, in a certain range can adapt to different sizes of heating bearings. If far-infrared light bulbs, attention should be under the direction of the bulb, so infrared radiation is not conducive to the human eye. Such bulbs can save energy. Lamp heating method is suitable for a small number of infrequently required; heating the bearing to the occasion, but also for ordinary bulb lighting, in addition to not need any other equipment.

5, Heating oil groove

This is the traditional method of heating a wider application, from the bottom of the oil sump is located at 50 ~ 70mm metal mesh, bearings placed online, use the hook to lift large bearings. Bearings should not be placed directly on the bottom to prevent contact with the bottom.