Four-row cylindrical roller bearings are mostly used in steel mill industry. ESG Bearing is using our experience, technology, expertise and commitment of quality to make the most suitable bearings for rolling mills.

Applications ◇ roll neck bearings on roll mill stands, ◇ applicable from roughing, intermediate, to finishing mill stands, ◇ mainly used in steel mills of billets, bars, wire rods, sections, and flats, etc. ,
Working Condition □ high radial load, and high temperature, □ contamination of debris, dust, and water, □ consistent impact and vibration,
	four-row cylindrical roller bearing
Features → inter rings interchangeable with outer rings to reduce downtime and maintenance costs → more durable and longer working life with selective bearing steel → special heat treatment processing enhancing higher impact resistance and wear resistance → P6 tolerance and sugaring finishing, resulting in higher running accuracy → 100% flaw detection avoiding defect causing mill lockdown

The inner ring and roller neck of four row cylindrical roller bearing should be interference fit. When installed, it should be heated to 80 ~ 90 ℃ and the temperature should not exceed 100 ℃. Otherwise, it is easy to cause annealing of bearing ring raceway and roller, affect hardness and wear resistance, and lead to bearing life reduction and premature scrapping. After the bearing is installed on the shaft, the inner ring must be pressed down immediately until it cools down. It is usually heated by induction heater, and it is forbidden to use cutting gun to bake. When the inner ring is installed on the roll neck, it is in close contact with the water retaining ring to prevent the water retaining ring from moving.

Our（ESG Bearings） four row Cylindrical Roller Bearing product awarded with national patent. All products awarded the ISO9001 quality management system certification for many times.

Carburized bearing steel is also called semi-hardenable steel, which is soft inside and hard outside. The material has a certain degree of "elasticity" for impact resistance. It needs to be carburized and quenched, and the process is more complicated.

G20Cr2Ni4A

Features and uses: used in impact-resistant occasions, medium and large bearings, and can be deeply carburized.

Technical characteristics: The effective carburizing layer can be deeper than 2.5mm, and the surface quenching and tempering hardness is HRC58~63.

Bearing parts made of this type of steel have high hardness (hardness ≥ HRC58), certain wear resistance and high contact fatigue resistance after heat treatment processes such as carburization, quenching and tempering, and guarantee The heart has good toughness (hardness HRC33-48). This surface hardened core has the characteristics of toughness, making the carburized bearing steel particularly suitable for stable operation under conditions of large impact loads.

After carburizing and quenching, the surface retains the state of compressive stress and has good fatigue resistance. It has strong ability to bear impact load, and the surface hardened layer has micro cracks and it is not easy to expand to the inside. The surface has a higher hardness and the core hardness is lower. Compared with high carbon chromium bearing steel, it has better core impact toughness. The depth and concentration of carburization can be adjusted as required.

However, the cost of bearings made of G20CrNi4A is relatively high, and in the use of small and medium-sized bearings, their life will not be greatly improved compared with bearing steel. Therefore, only carburized steel is used for medium and large bearings.