Cylindrical Roller Bearing Four Row

Cylindrical roller bearings are a common part of many machines. The continuous operation of wire and rod-rolling mills demands a high level of reliability. They also need to be durable and wear-resistant. A machined steel cage helps to minimize wear. The surface-carburized raceways and rollers resist impact loads and fatigue cracking. The logarithmic crown profile provides additional resistance to fatigue wear and increases service life.

Timken

The four-row Timken cylindrical roller bearing is designed for high-speed applications at elevated temperatures. Its well-balanced cross sections allow high radial-load capacity within the bearing envelope. It has a radial internal clearance that must be included with the bearing assembly. Its inner-ring set is usually a single-piece assembly, and the outer-ring assembly can be one or two pieces. The inner-ring set is grinded on a final level after mounting it on the roll neck.

It comes in two designs. One is a single-ribbed type, while the other has a double-ribbed design. Both can support radial or axial load with minimum friction. Single-rib NJ bearings are used for light unidirectional thrust loads, while the double-rib NJ type accommodates heavier radial loads.

NSK

The NSK cylindrical roller bearing four-row model is suitable for many applications, and comes in a variety of sizes. Its basic design combines a NJ-type cylindrical roller bearing (CRB) with an HJ-type L-shaped thrust collar. These models are designed for axial loads and feature high radial rigidity.

A four-row cylindrical roller bearing has a high number of rolling elements, making it ideal for applications involving very high radial loads. They are almost exclusively used for back-up rolls in rolling mills. Another advantage of this type of bearing is its long life. A sealed four-row cylindrical roller bearing is capable of extending its service life by ten or more times over a standard steel bearing.

NSK four-row cylindrical bearings are highly durable, with a high load capacity. They have an extended service life under water and metallic contamination, and are also available with sealed-clean solutions to reduce grease consumption.

American Roller

Cylindrical roller bearings come in single, double, and four row configurations. They have cylindrical rollers and can accommodate high radial and axial loads. These bearings have excellent lubrication and corrosion resistance properties. In addition, they are suitable for moderate to heavy thrust-load capacities. Some four-row cylindrical roller bearings are sealed to extend their service life and minimize the risk of contamination.

Double-row cylindrical roller bearings are also available in two different bore sizes and have either a cylindrical or a tapered bore. Some are equipped with lubrication holes and grooves on the outer ring. These bearings are sometimes identified by supplementary codes such as "W". Another feature of these bearings is the machined bronze retainer. It helps maintain the correct distance between the rolling elements, reducing vibration and noise. The design of this type also makes it suitable for use in high-speed applications.

NSK four-row cylindrical bearings are designed to accommodate heavy loads and are reliable in rolling mill stands. Their design and materials make them ideal for high-speed machining processes and gearboxes. These bearings are made from high-performance cage options and are manufactured to precise tolerances. Their design allows them to achieve high capacity and accuracy and reduce maintenance costs by 50%.