The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM GROUP main products focus on the cold and hot plate & wide strip mill rolls and heavy section mill rolls and big casting & forging pieces.

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The main functions and important aspects of work rolls in the steel rolling process


Rolling mill rolls are a critical component in the process of steel rolling, playing a key role in shaping and reducing the thickness of metal sheets or strips. Here are the main functions of work rolls in detail and some important aspects related to rolls in the context of steel rolling:

Here are the main functions of work rolls in detail:

Reduction of Thickness:

Primary Purpose: The primary function of rolls is to reduce the thickness of the metal being processed through plastic deformation.

Gradual Reduction: rolls achieve thickness reduction by exerting pressure on the metal as it passes through the rolling mill. This pressure causes the material to deform and elongate, reducing its thickness.

Shape and Profile Control:

Shaping the Metal: rolls play a key role in imparting the desired shape and profile to the metal. The contour and configuration of the rolls contribute to shaping the cross-sectional geometry of the rolled product.

Consistency: Precise shaping ensures that the final product meets the required specifications and dimensional tolerances.

Surface Finish Improvement:

Smoothing Effect: rolls contribute to improving the surface finish of the rolled material. The precision-ground surface of the rolls imparts a smooth and uniform finish to the metal.

Removal of Defects: Surface defects and imperfections can be minimized through the proper design and maintenance of rolls.

Prevention of Wrinkling and Bending:

Wrinkle Prevention: Work rolls, along with backup rolls, help prevent the formation of wrinkles or distortions in the metal strip during the rolling process.

Bending Control: Work rolls contribute to maintaining the flatness of the material and preventing undesirable bending or warping.

Temperature Control and Heat Dissipation:

Heat Generation: The rolling process generates heat due to friction between the work rolls and the metal.

Cooling Systems: Work rolls often incorporate water cooling systems to dissipate heat, preventing excessive temperature rise. This helps in controlling thermal expansion and maintaining the mechanical properties of the rolls.

Uniform Deformation:

Even Pressure Distribution: Work rolls ensure an even distribution of pressure across the width of the metal, promoting uniform deformation. This uniformity is essential for achieving consistent product quality.

Alignment and Calibration:

Proper Alignment: Work rolls need to be properly aligned to maintain the correct rolling geometry and prevent issues such as uneven thickness or shape variations.

Calibration: Regular calibration and adjustment of work rolls contribute to achieving the desired product specifications and tolerances.

Wear Resistance and Durability:

Material Selection: The choice of high-quality materials for work rolls, along with proper heat treatment, enhances wear resistance and durability.

Surface Coatings: Some work rolls may have coatings or treatments to further improve wear resistance, extending their lifespan.

Understanding and optimizing these functions of work rolls are essential for achieving efficient and high-quality steel rolling processes in the manufacturing industry.

steel rolling mill rolls

Here are some important aspects related to work rolls in the context of steel rolling:

Types of Work Rolls:

Backup Rolls: These provide support to the rolls and prevent bending or distortion during the rolling process.

Work Rolls: These are the primary rolls that come in direct contact with the metal being rolled. They are usually smaller in diameter compared to backup rolls.

Surface Treatment:

Grinding: rolls are precision-ground to ensure a smooth and uniform surface finish, which is crucial for the quality of the rolled product.

Coatings: Some rolls may have coatings or treatments to enhance wear resistance and reduce friction.

Maintenance and Inspection:

Regular Maintenance: rolls require regular inspection and maintenance to ensure their proper functioning and to address any signs of wear or damage.

Grinding and Refurbishment: Periodic grinding and refurbishment may be necessary to maintain the desired surface quality.


Water Cooling: rolls are often equipped with water cooling systems to dissipate the heat generated during the rolling process, preventing excessive wear and thermal damage.

Monitoring and Control:

Thickness Measurement: Advanced rolling mills often use sensors and automation to monitor and control the thickness of the rolled material, ensuring consistency and precision.

Roll Chocks and Bearings:

Chocks: rolls are mounted in roll chocks, which provide support and allow for adjustment.

Bearings: Quality bearings are essential to minimize friction and ensure smooth rotation.

Understanding the characteristics, maintenance requirements, and proper use of rolls is crucial for achieving high-quality and efficient steel rolling processes. Regular monitoring, maintenance, and technological advancements contribute to improving the overall performance of rolls in the steel industry.

mill rolls

Work rolls

Rolling mill rolls

Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.

Always a pre-production sample before mass production;
Always final Inspection before shipment;
During the epidemic, provide remote detection technical support

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Rolling mill rolls product

Classification by roll material:

Cast iron mill rolls

  • Alloy indefinite chilled cast iron rolls
  • Alloy chilled cast iron rolls
  • Alloy SG ductile cast iron roll
  • Pearlitic ductile cast iron roll
  • Bainite ductile cast iron roll
  • Centrifugal cast iron roll

Cast steel mill rolls   

  • Alloy cast steel rolls
  • Semi-steel roller
  • Graphite steel rolls
  • High-chromium steel roll
  • High-speed steel roll

Forging mill rolls

Sort by position on the rolling mill:

Work rolls
backup rolls

Intermediate roll

Product advantage

The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory.
Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.

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