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.

LMM GROUP Certification


Repair method of polymer composite material for mill roller bearing wear


It has super adhesion, excellent compressive strength, wear resistance and corrosion resistance and other comprehensive properties.
The use of polymer composite materials can be repaired without disassembly on site when the wear size of the transmission part is relatively small. It not only avoids mechanical processing, but also has no thermal stress and thermal influence of repair welding, and the repair thickness is not limited.

At the same time, the wear resistance of the product and the concessionality that metal materials do not have, ensure 100% contact cooperation of the repaired parts, reduce the impact and vibration of the equipment, and avoid the possibility of wear.

And greatly prolong the service life of equipment components (including bearings), save a lot of downtime for enterprises, and create huge economic value.

Cold welding repair method: The cold welding machine uses the principle of electric spark high-frequency discharge to perform heat-free surfacing welding on the metal surface, so it does not deform, anneal, undercut and residual stress in the process of repairing roll blisters, scratches and other defects. Does not change the state of metal organization.

The repairing precision is high, and the coating thickness is from several microns to several millimeters. It can deposit, seal, fill and repair defects such as wear, scratches, pinholes, cracks, defect deformation, hardness reduction, trachoma, damage and other defects in metal workpieces. , It only needs to be ground and polished, and it can also be used for various types of mechanical processing such as turning, milling, planing, and grinding, as well as post-processing such as electroplating.

rolling mill roll grinding

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

Tell us a little about your application and we’ll get back to you to finalize a quotation to meet your needs as quickly as possible.

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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We would be happy to help and advise if you have any questions or inquiries.