LMM GROUP has produced cemented carbide roll rings for 20 years since 1991. In the rapid development of the company, the team is strong and has become the main supplier of cemented carbide roll rings.

LMM GROUP focuses on efficient solutions, we hope to help more users in the supplier field understand steel roll carbide, and work with users to solve different rolling technology solutions.

Looking forward to the future, we will continue to focus on the development direction of the world’s charging technology, with the corporate goal of “meeting customer needs and creating value for customers”, and providing you with better quality, more competitive products and better services.

Finished carbide roll rings

Dimension rang of finished rolls

External diameter(mm)

Inner diameter(mm)





Tolerances allowable for the O.D., I and height of roll ring 

Precision class

External diameter(mm)≤200mm

External diameter(mm)≥200mm






Out diameter(mm)






Inner diameter(mm)










We can supply them accrding to the drawings provided by customers

Grooved tungsten carbide roll ring

Roll rings for high speed rolling of ribbed steel bars

Composite cemented carbide roll rings

KOCKS roll rings

Three dimensional carbide rolls for cold rolling

LMM GROUP KOCKS Cemented Carbide Roll Rings for KOCKS three-roll mill, life is a cast iron roll ring 10 times.

Service is to be rendered for the design,groove machining and rib machining of comp-osite cemented carbide roll rings.

Production equipment

The company has an integrated office space including a R&D center and a testing center, and a large-scale modern carbide roller ring production line. It can independently complete the entire process from product design, research and development, production of tungsten carbide powder to cemented carbide roll ring forming, processing, slotting, and rib milling of finished products. It has reached a production scale of 1,000 tons (50,000 pieces of cemented carbide roller rings) per year. The output ranks among the top in the world.

Whole process supervision of the quality of raw material

LMM tries its utmost to meet the demand of customers. Our professional R&D department and production line will provide the direct and effective quality and service for you.

With over twenty years’ experience on the production of cemented carbide roll rings, LMM has established an inte-grated system including R&D and extraction of powder and production and marketing of alloy . Through our professional service, you can make the correct choice for the material to match your product.

Cemented carbide roll rings of production process

The main raw material of cemented carbide is tungsten carbide powder. In order to ensure the stability of cemented carbide roll ring products, the company invested 20 million US dollars in 2010 to introduce equipment specialized in the production of tungsten carbide powder, achieving self-sufficiency in the production of tungsten carbide raw materials. Thus avoiding the instability of product performance caused by purchasing raw materials from different suppliers.

The company strictly according to modern enterprise management requirements set up a perfectquality assurance system, and passed the ISO9001:2008 quality management system certification, ISO14001:2004 environmental management system certification, OHSAS18001:1999 occupationalhealth and safety management system certification.


LMM GROUP for your improved service

Pre-Sales Service

* Inquiry and consulting support.

* Planning layout and Design requires machinery

* Welcome visit our Factory.

After-Sales Service

* Engineers available to service machinery overseas.

* IN-TIME delivery goods.

* Free charges for installing, training and debugging.

* Long-term technical support.

Contact us today to learn more about our Tungsten Carbide Rolls

(86) 411 84174804

Address Yintian South Park, , Ganjingzi District, Dalian 116000, China 

Contact US Now !

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