Steel rolling mills, sintering furnaces, metallurgical heat treatment furnaces, hot rolling production lines, cold rolling conveying equipment, metallurgical drying equipment, blast furnace auxiliary transmission devices and non-ferrous metal smelting equipment operate under extremely harsh working conditions of continuous high-temperature radiation, alternating cold and heat impact, ultra-heavy load extrusion, metallurgical dust accumulation and 24-hour uninterrupted continuous operation, ranking among the industrial scenarios with the highest temperature, maximum load and most severe loss. Ordinary standard cylindrical roller bearings have poor heat resistance and cannot adapt to the high-temperature production environment of metallurgy, prone to widespread failures. High-temperature radiation and heat conduction from the furnace cause a sharp temperature rise of bearings, leading to high-temperature annealing and material softening of ordinary bearing steel, as well as raceway collapse, roller deformation and cage burnout. Conventional grease rapidly carbonizes and fails at high temperatures, depriving bearings of lubrication protection and causing dry friction, locking and shaft burning failures during high-speed and heavy-load operation. Frequent cold and heat alternation triggers thermal expansion and contraction fatigue of materials, resulting in surface cracks, peeling and complete precision failure of bearings. Continuous intrusion of metallurgical scale and metal dust causes severe abrasive wear, aggravating bearing loss and leading to excessive equipment vibration, transmission stalling and frequent production line shutdowns. Metallurgical production lines have extremely high shutdown costs. Frequent bearing replacement and equipment failures directly cause reduced production capacity, soaring operation and maintenance costs and delayed production progress for metallurgical enterprises, becoming a long-term core pain point in the metallurgical industry.

Focusing on the high-temperature and heavy-load field of metallurgy, Japan NMT specially develops metallurgical-grade high-temperature resistant heavy-duty cylindrical roller bearings to solve the industry pain points of ordinary bearings such as poor high-temperature resistance, easy annealing and softening, lubrication coking, heavy-load deformation and dust wear. Through five core upgrades including special high-temperature resistant alloy base materials, heat insulation protection structure, high-temperature anti-coking lubrication system, thermal alternating fatigue strengthening technology and dust wear-resistant protection design, it thoroughly breaks through the high-temperature performance bottleneck of ordinary bearings, eliminating high-temperature annealing, lubrication carbonization, heavy-load deformation and abrasive wear problems. It can stably withstand hundreds of degrees Celsius high-temperature working conditions in metallurgical workshops for a long time, adapting to the continuous heavy-load production of the whole process of steel rolling, sintering and smelting.

Core Product Advantages

1. Special high-temperature alloy resists annealing at high temperature: Adopting special heat-resistant alloy bearing steel for metallurgical equipment with high-temperature stabilization heat treatment, it has excellent high-temperature resistance of metallographic structure, which can withstand long-term continuous high-temperature radiation and heat conduction without material softening, annealing failure or structural deformation.

2. Heat insulation protection structure blocks high-temperature conduction: Optimizing the overall bearing structure with exclusive heat insulation buffer design, it effectively isolates high-temperature thermal radiation from equipment furnaces, reduces the temperature rise of the bearing body, avoids direct high-temperature erosion on the core structure of the bearing, and greatly improves the operation stability under high-temperature working conditions.

3. High-temperature anti-coking lubrication eliminates dry friction and ablation: Equipped with exclusive metallurgical ultra-high-temperature anti-carbonization lubrication formula, it is not easy to coke, carbonize or lose at high temperatures, continuously forming a tough oil film to maintain a good lubrication state, completely solving high-temperature failures such as dry friction, locking and shaft burning.

4. Thermal alternating fatigue resistance withstands cold and heat impact: Specially strengthened for the cold and heat alternating impact generated by the start-stop and working condition switching of metallurgical equipment, the material has greatly improved thermal expansion and contraction fatigue resistance, without cracking, peeling or precision attenuation under repeated temperature fluctuations, adapting to intermittent high-temperature operation conditions.

5. Dust and wear-resistant design resists dust abrasion: Adopting thickened dust-proof sealing structure with wear-strengthened surface layer, it effectively blocks the intrusion of metallurgical scale, metal dust and furnace ash into the interior, eliminating abrasive wear and internal stalling, and greatly extending the service life of bearings under high-temperature and heavy-load conditions.

Application Scenarios

Cold and hot rolling mill equipment, sintering furnace transmission devices, metallurgical heat treatment furnaces, blast furnace auxiliary equipment, non-ferrous metal smelting machinery, metallurgical drying and conveying equipment, hot rolling production line roller shaft transmission, high-temperature metallurgical heavy-load supporting equipment.

Precision Quality Assurance

NMT metallurgical high-temperature heavy-duty cylindrical roller bearings are manufactured in strict accordance with Japanese metallurgical heavy industry high-temperature equipment manufacturing standards. Adopting selected high-temperature resistant high-strength special alloy steel, they undergo high-temperature annealing stability test, thermal alternating impact durability test, high-temperature lubrication anti-carbonization test, dust abrasion aging test and limit heavy-load deformation test. All products feature excellent high-temperature resistance, stable heavy-load structure, outstanding anti-coking, wear resistance and fatigue resistance, fully adapting to the extreme harsh working conditions of high temperature, heavy load, dust and cold-heat alternation in the metallurgical industry.

Product Range

Metallurgical high-temperature cylindrical roller bearings, high-temperature resistant bearings for rolling mills, long-life heavy-duty bearings for sintering furnaces, wear-resistant bearings for heat treatment furnaces, high-temperature anti-coking bearings, cold-heat alternating fatigue-resistant bearings, customized non-standard bearings for metallurgical high-temperature working conditions.

Brand Strength

Japan NMT focuses on the R&D and manufacturing of exclusive bearings for industrial extreme working conditions, fully covering high temperature, low temperature, heavy load, corrosion resistance, high speed, wear resistance and fatigue resistance scenarios. With Japanese metallurgical-grade high-temperature precision technology, extreme thermal condition structural optimization and strict high-temperature durability detection system, it accurately solves the industry problems of metallurgical equipment bearings such as high-temperature burnout, coking locking, deformation wear and short service life, providing high-temperature resistant, high-load and ultra-long-life core transmission accessories for the global metallurgical, steel and smelting heavy industry.