What Types of FAG Bearings Are Used in Metal Smelting Rolling Mills?

FAG offers a wide range of bearings specifically designed for the metal smelting and rolling mill industry. With deep expertise in this sector, FAG develops bearings tailored for extreme operating conditions. These specialized bearings are suitable for key equipment such as continuous casting, hot rolling, and cold rolling lines. Leveraging their technical advantages in high-temperature resistance, heavy-load capacity, and corrosion prevention, they withstand the industry’s most demanding environments. This helps reduce downtime, lower maintenance costs, and improve both production efficiency and product quality.

I. Converters

Converters are core equipment for converting pig iron into steel by reducing carbon content and adding alloying elements. Suitable bearings include:

  • Spherical Roller Bearings: Capable of withstanding extremely high radial loads and certain axial loads. Their self-aligning ability effectively compensates for misalignment between the trunnion axis and the bearing housing, ensuring smooth tilting.

II. Ladle Turrets

Ladle turrets transport ladles between casting and tapping positions, ensuring smooth operation of continuous casting lines. Suitable bearings include:

  • Cylindrical Roller Bearings: Provide high rigidity and radial support, ensuring transmission accuracy and efficiency.
  • Spherical Roller Bearings: Withstand heavy loads and compensate for misalignment, ensuring structural stability of the equipment.

III. Continuous Casting Plants

In continuous casting, steel is poured through a mold to form strands. During cooling, the strands are conveyed and supported by slowly rotating rolls. Bearings for these rolls must operate reliably under high loads, high temperatures, and water spray conditions. Suitable bearings include:

  • Spherical Roller Bearings: Carry heavy loads and automatically compensate for misalignment, addressing deformation issues in the roll system.
  • Cylindrical Roller Bearings: Provide high rigidity and high load-carrying capacity for radial support, ensuring stable operation of the roll system.
  • Full-Complement Cylindrical Roller Bearings: Offer maximum radial load capacity and impact resistance in extremely limited spaces.
  • Needle Roller Bearings: Provide efficient radial support in applications with extreme radial space constraints.
  • Bearing Housings with Cooling Water Circulation: Actively dissipate heat to protect bearings from radiation heat of high-temperature strands.
  • Split Bearings: Enable quick and convenient replacement and maintenance, significantly reducing unplanned downtime.

IV. Hot Rolling

Hot rolling involves shaping high-temperature steel slabs (typically above 1000℃) under extremely high rolling forces. Suitable bearings include:

  • Four-Row Tapered Roller Bearings: Capable of withstanding extremely high radial loads and bidirectional axial loads with high rigidity. The optimized internal profile ensures even load distribution, guaranteeing rolling precision and roll system stability.
  • Four-Row Cylindrical Roller Bearings: Offer high radial load capacity, along with features such as high limiting speed, high precision, and separable and interchangeable inner and outer rings. These bearings are well-suited for the high-speed, heavy-load conditions of backup rolls.

V. Cold Rolling

In cold rolling, cold-rolled strips are typically formed without preheating. Compared to hot rolling, cold rolling achieves higher dimensional accuracy, better surface quality, and thinner sheet thickness. Suitable bearings include:

  • Four-Row Cylindrical Roller Bearings: Ensure uniform sheet thickness and excellent surface quality under extremely high loads, making them suitable for the heavy-load conditions of backup rolls.

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