①The sealing principle of Oil Seals

In the free state, the inner diameter of the oil seal is smaller than the shaft diameter, making it interference. After the oil seal is installed on the shaft, the pressure of the cutting edge and the contraction force of the self-tightening spring produce a certain radial holding force on the sealing shaft, blocking the leakage gap to achieve the purpose of sealing.

②Product characteristics of Oil Seals

It is generally installed in the groove of the outer circle or the inner circle with a rectangular cross section. The oil seal is divided into skeleton and no skeleton, spring and no spring, single lip and double lip. The installation position of the oil seal is small, the axial size is small, so that the machine is compact, the sealing performance is good, and the service life is long. The oil seal has a certain adaptability to the vibration of the machine and the eccentricity of the spindle, and it is easy to disassemble, convenient to repair and inexpensive, but it cannot withstand high pressure.

③The role of the oil seal

Prevent sediment, dust, water, etc. from outside into the bearing;
Limit oil leakage in bearings.

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