Cause analysis of leakage at the lip area of oil seal

The lip wear out too quickly

1. Insufficient lubrication;

2. There is a foreign body bite;

3. The radial force is too large;

4. The axial surface is too rough;

5. The lip material is defective.

The lip area partially worn

1. Larger installation eccentricity

2. Tilt installation

Hardening of the lip area

1. Abnormal high temperature;

2. The radial force is too large;

3. Insufficient lubrication;

4. The lip material is defective.

Softening of he lip area

1. Defects in lip material:

2. The radial force is small.

Lip area injuries

1. Poor assembly;

2. Poor shaft chamfer;

3. There is a foreign body bite;

4. The installation tool has burrs.

The lip thread is rotated in the wrong direction

1. Thread processing error;

2. The mold processing is wrong.

The lip fold and hold up

1. Poor shaft chamfer;

2. Poor assembly;

3. There are carbon deposits.

Oil seal has no abnormality

1. Shaft surface damage;

2. The axis eccentricity beats too large;

3. Shaft surface wear;

4. The installation direction is reversed.

Oil seal deformation

1. Improper assembly operation:

2. The installation tool does not match;

3. Transportation and transshipment deformation.