The radial clearance of double row deep groove ball bearings refers to the amount of movement from one extreme position to another in the direction perpendicular to the axis of double row deep groove ball bearings. It should be known that the selection of this clearance has a great impact on the accuracy of mechanical operation, bearing life, friction resistance, temperature rise, vibration and noise, etc.
If the clearance of double row deep groove ball bearings is too small, the number of rolling elements bearing load will increase, the contact stress will decrease, and the operation will be more stable. However, the friction resistance will increase, and the temperature rise will also increase. On the contrary, the contact stress increases and the vibration increases, while the friction resistance decreases and the temperature rise decreases. Therefore, it is of great significance to select the appropriate clearance value according to the service conditions of bearings.