Thermal Expansion and Temperature Fluctuations Affect Bearing Clearances

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Thermal Expansion and Temperature Fluctuations Affect Bearing Clearances

During rolling mill operation, bearings are subject to significant temperature fluctuations. Thermal expansion of rolls and housings alters bearing clearances.

Temperature Impact

  • Thermal expansion of rolls
  • Change in bearing clearances
  • Condensation during cooling
  • Lubricant degradation at high temperatures

Solutions

Bearings with increased clearances are used to compensate for thermal expansion. Bearings with heat-resistant lubricants are employed. A cooling system is recommended.