The working conditions for steel mill bearings are demanding as they will face dust, steel particles, water, heat, high speed and high temperature.

Four-row cylindrical roller bearing works as the radial cylindrical roller bearings on the roll neck. Its performance values the most for the rolling mill bearings.

ESG Bearing, as an expert on steel rolling mill bearings. We are always improving ESG quality to better meet steel mill’s requirements. With years of testing, ESG Bearing now announced that ESG has successfully make our four-row cylindrical roller bearings with steel cage.

The working life, wear-resistance and performance of the radial cylindrical roller baring with steel cage proves to be better than bearing with brass cage.

Mechanical Performance
Cage	Tensile Strength	Yield Limit	Peel Strength	Hardness
	σb	σ0.2	δ	HB
steel cage	＞400MPα	＞250MPα	18%	＞160~190
brass cage	＞250MPα	＞120MPα	15%	80~100
steel cage brass cage
＞ 90% clients re-order four-row cylindrical roller bearing with steel cage

Four row cylindrical roller bearings + Thrust Bearings

Cylindrical roller bearings inner diameter works together with roll neck to endure radial force. It has the advantages of heavy load, high rotation speed limit, high precision,inner and outer rings seperability and replacability, easy procession, lower production cost and convenient mounting and dismounting. The thrust bearings endure axial force. The detailed structure type can be chosen based on rolling mill feature.

When the heavy load speed is slow, the cylindrical roller bearings work with thrust bearings to endure thrust load with smaller axial clearance. When the rolling speed is higher, it works with angular contact ball bearings with higher rotation speed limit and with strick control of axial clearance to make the roller work with close axial guide and endure general axial load force.

This bearing specification type has the advantage of longer bearing life, reliability, high presion of the rolling products and easy control. So they are applicant widely in wire steel rolling mill, plate steel rolling mill,frame rolling mill, double-support roll of cold rolling mill and hot rolling mill.

Four Row Tapered Roller Bearings

Four row tapered roller bearings can endure both radial force and axial force without thrust bearings to make the main machine more compact. The inner diameter and the roll neck of four row tapered roller bearings work together with loose fit-up for convenient installation and dismounting. However sometimes the loose fit-up will slip. So the inner diameter will be made with screw oil tank.

At present, this specification model is still widerly applied in the working rolls of the four row hot rolling mill and cold rolling mill, bloomer and beam rolling mill.    

ESG Bearing started running our new bearing warehouse recently.

ESG Bearing has been making bearings for steel mills of billets, rebars, sections, angles, coils, for years. We deeply know what steel mills are always looking for. Quality bearing with the fastest delivery.

ESG Bearing has a large stock of steel mill bearings for better service to our clients. Our stock covers most of the highly wanted bearing models for steel mill bearings. Our immediate delivery will also help steel mills reduce their stock and cost for maintenance.

You may also contact us for regular update of our stock list.

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

Four row cylindrical roller bearings are mainly used in cold/hot rolling mill,bloomer and other steel rolling mill machines.The bearing structure is separate structure. The bearing rings and rollers can be separated easily. So it is convenient for bearing cleaning, checking, mounting and unmounting jobs.

FC model bearing is consist of two outer rings and one inner ring. On the both sides of outer rings, there are blocker,middle blocker on the middle of the blocker. There is no blocker on the inner rings.

FCD model bearings consist of two pieces of NN model bearings..

As critical roller bearing of rolling mill, the spare parts of four row cylindrical roller bearings can be replaced, installed, dismounted and cleaned easily. Within the radial installation area, it can provide max. radial loading ability with lower friction factor.

There are three kinds of structure type: FC type, FCD type and FCDP type.

FC Type

It belongs to separable bearings that inner ring can be seperated from the whole bearings. It has better limit rotation speed and can be interchangable. Protection cage can be brass or steel cages.

FCD Type

It belongs to separable bearing. However FCDP type will be much convenient than FCD type for separable degree. For FCD type, it can only make two inner rings separate from the whole bearing with higher limit rotation speed and interchangable feature. Protection cage can be brass or steel cages.

FCDP Type

It is critical roller bearing. The spare parts can be separable with high precision. It is very convenient to install, dismount and clean. Within installation area, it can provide max. radial load ability with lower friction factor. So it is applied in high speed, heavy load and terible working environment of rolling mill production.

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.

Generally speaking, the rolling mill stands will have 2 rolls, 3 rolls, 4 rolls, or a set of multiple rolls mounted onto the stands.  The loads on the rolls will transfer to the roll neck bearings and their housings during the rolling of steels. The roll neck bearings are to meet the basic need of the smooth rolling of steel products. They will differ from sizes, carrying capacities and other aspects, due to different requirements and working conditions. Therefore, they will have different configurations and speeds of rolling.

The bearings are designed to withstand high loads, impacts, varying speeds and high temperature. They also need to work with metal particles, dirt, and water. Therefore, the bearings should be made with good material and technique to endure the toughest working conditions. Roll neck bearings with high quality will help steel mills reduce a lot for reducing power consumption, downtime, and improving rolling conditions.

With best bearing material choosing, and strict control on processing, ESG Bearing is able to meet most modern steel mills’ high requirements. ESG Bearing is also the only 1 factory bearing manufacturers having 100% flaw detection on the bearings. Thus the bearing quality will be assured.