the shaft and the bearing housing tolerances choice and control
2014-01-12 by seoer4
the shaft and the bearing housing tolerances choice and control
After bearings pressed into the bearing block should be flexible rotation no sense . If significant rotation is not flexible , it indicates the size of the shaft is too great, the tolerance to be reduced. After such thrust cylindrical roller bearings pressed into the shaft turned by hand obvious "imperfections " sense , it may be too much tolerance of the shaft or shaft roundness bad . So when good control shaft and the bearing chamber also control the roundness tolerance , many domestic manufacturers only tolerance control , no roundness control.
2 , the bearing assembly methods
Because rotary table bearing bearings are precision products, such as improper assembly is likely to cause damage to the bearing channel , leading to bearing damage. Thrust cylindrical roller bearings in the assembly should have a dedicated mold and can not beat , pressed into the shaft when the force only a small circle , the circle of force only when the pressure of the big circle. When using pneumatic or hydraulic assembly requirements , in the press-fit upper and lower mold levels to remain outside the state , if inclined bearing channel will cause damage due to power , leaving the bearing guide ring .
3 , the assembly to prevent foreign matter
Bearing in balancing the rotor mounted to do when it is easy Four-Row Cylindrical Roller Bearing to iron produced when balancing into bearings inside , so it is best to do before loading bearing balancing . There are some manufacturers in order to facilitate assembly , the assembly in the bearing chamber coated with some oil or grease lubrication effect , but often it is difficult for the operator to control the amount of good , if oil or grease in the bearing chamber accumulates more thrust cylindrical roller easily into the interior of the bearing along a rotation axis of the bearing . Bearing chamber preferably not coated with oil or grease, such as non- coated bearings shall not be have to control indoor accumulates .
4 , rust preventive paint
Paint rust is characterized by multiple in sealed-type motor, the motor in the assembly sound good, but in the warehouse for some time, the motor becomes very abnormal sound , remove the IKO bearings have serious rusting . Many manufacturers will be considered to be thrust cylindrical roller bearing problem , through our continuous publicity , now have realized that the main motor plant is insulating paint problems. The problem is mainly because the insulating paint out of volatile acid at a temperature, humidity corrosive substance is formed , resulting in damage to the bearing channel bearing corrosion. The problem can only be a good choice of insulating paint , and after a period of time after the ventilation drying assembly.
After bearings pressed into the bearing block should be flexible rotation no sense . If significant rotation is not flexible , it indicates the size of the shaft is too great, the tolerance to be reduced. After such thrust cylindrical roller bearings pressed into the shaft turned by hand obvious "imperfections " sense , it may be too much tolerance of the shaft or shaft roundness bad . So when good control shaft and the bearing chamber also control the roundness tolerance , many domestic manufacturers only tolerance control , no roundness control.
2 , the bearing assembly methods
Because rotary table bearing bearings are precision products, such as improper assembly is likely to cause damage to the bearing channel , leading to bearing damage. Thrust cylindrical roller bearings in the assembly should have a dedicated mold and can not beat , pressed into the shaft when the force only a small circle , the circle of force only when the pressure of the big circle. When using pneumatic or hydraulic assembly requirements , in the press-fit upper and lower mold levels to remain outside the state , if inclined bearing channel will cause damage due to power , leaving the bearing guide ring .
3 , the assembly to prevent foreign matter
Bearing in balancing the rotor mounted to do when it is easy Four-Row Cylindrical Roller Bearing to iron produced when balancing into bearings inside , so it is best to do before loading bearing balancing . There are some manufacturers in order to facilitate assembly , the assembly in the bearing chamber coated with some oil or grease lubrication effect , but often it is difficult for the operator to control the amount of good , if oil or grease in the bearing chamber accumulates more thrust cylindrical roller easily into the interior of the bearing along a rotation axis of the bearing . Bearing chamber preferably not coated with oil or grease, such as non- coated bearings shall not be have to control indoor accumulates .
4 , rust preventive paint
Paint rust is characterized by multiple in sealed-type motor, the motor in the assembly sound good, but in the warehouse for some time, the motor becomes very abnormal sound , remove the IKO bearings have serious rusting . Many manufacturers will be considered to be thrust cylindrical roller bearing problem , through our continuous publicity , now have realized that the main motor plant is insulating paint problems. The problem is mainly because the insulating paint out of volatile acid at a temperature, humidity corrosive substance is formed , resulting in damage to the bearing channel bearing corrosion. The problem can only be a good choice of insulating paint , and after a period of time after the ventilation drying assembly.