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When the FAG bearings inner diameter greater than 70mm, or with an interference is large, the heating method of bearings hole expansion, so install saving time, also to avoid damage due to excessive force.
You may need to control the temperature, FAG bearings generally heated to 80 ° c, up to 100 degrees centigrade. It is enough. More than 120 ℃ will lead to a tempering FAG bearings, which rings of lower hardness and a loss of precision.
Commonly used heating methods are:
1, electric heating plate heating method:
FAG bearings placed at a temperature of 100 degrees centigrade, electric heating plate for a few minutes, this method is most convenient, such as flipped several times makes bearings heat evenly, and high efficiency, size bearings are available using this method.
2, electric furnace heating method:
FAG bearings within the closed automatic temperature control electric furnace heating, heating uniformity, temperature control accuracy, quick heating, suitable for many bearings are heated.
3, induction heating method:
Using induction heater can be fast, reliable, and clean the FAG bearings heated to the required temperature, this is especially suitable for tight fit of the inner ring, because heating the inner ring patrons circle heating rarely, so you can more easily on the shaft, seat can also be easily mounted in the hole.
4, the light bulb heating method:
With 50W light bulb heating of FAG bearings, heating temperatures at around 100 ° c can be guaranteed, smaller bearings can be placed directly on the bulb, larger bearings can be placed within the cone of the bulb cover, cone-shaped hood can prevent bulb heat loss and heat evenly. Cone-shaped hood can adjust up or down, must be able to adapt the scope of heating FAG bearings of different sizes. If using a far-infrared light bulb, note bulb orientation should be down to avoid infrared rays is not good for the eyes. These light bulbs to energy-saving. Light bulb heating method applied to small and does not require constant number; to bearings heated occasions, usually light bulbs can also be used for lighting, and does not need any additional equipment.
5, oil tank heating method:
This is a widely used method of traditional heating oil 50~70mm Office is located at the bottom throw metal mesh, placed online FAG bearings, bearings using the hook lift. Bearings should not be placed directly in the tank bottom, to prevent contact with local heating of bearings parts of the tank bottom is too high, or slot precipitated the end of the dirt into the bearings. Oil tank heating points of the law are as follows, using non-corrosive heat stability of mineral oil, preferably a transformer oil, oil and containers shall be kept clean. Capacity of the tank should be heated depends on the bearings size and the amount of oil, if the container is too small, at the time of continuous operation, put a FAG bearings oil temperature will be dropped soon, the effect on the wrong side.
Second, points heating installation method:
① heat temperature controlled, high temperature FAG bearings damage, temperature is too low then the ring expansion volume, the effects are not significant. Proceeds of 80~1000℃ temperature thermal expansion of diameter of the inner ring, which for purposes of FAG bearings in General interference with, is already sufficient.
② Once you reach the required heating temperature, will be installed as soon as possible, in order to avoid cooling installation difficulties.
③ FAG bearings in the cooling in the width direction also have contracted, so exert a certain pressure when installing the inner ring shoulders tightly, and after cooling, with very thin test-examiner for testing, whether between the inner ring and shaft shoulder there is gap. In short, butterfly required skilled, quick and accurate.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 24028CE4 NSK | 140 | 210 | 69 |
| 23028CDE4 NSK | 140 | 210 | 53 |