Four Row Tapered Roller Bearings

Four-row tapered roller bearings are one kind of roll neck bearings. Their radial and axial loading capacity are high. They can carry axial loads in two directions, and their radial loading capacity is three times heavier than single-row tapered roller bearings, but the limiting speed is lower. They can be used as axial locating bearings in two directions because they can limit axial displacement in two directions within axial clearance. The radial and axial clearance also can be adjusted by changing the width of the spacer between the inner and outer rings. They are used almost exclusively in work roll applications such as rolling mills. You can get four-row tapered roller bearings in the TQO and TQI designs.

Product parameter

TQO design bearings (face-to-face arrangement)

TQO design bearings have two pairs of tapered roller and cage assemblies. The two rows of rollers of each pair are arranged face-to-face. Because TQO is the most widely used four-row tapered roller bearing design, We manufacture this design in many variants.

• Open or sealed.
• With cylindrical or tapered bore.
• With or without inner ring extension on both sides.
• With or without a helical groove in the bore.

TQI design bearings (back-to-back arrangement)

TQI design bearings have two pairs of tapered roller and cage assemblies. The two rows of rollers of each pair are arranged back-to-back. These bearings provide relatively stiff bearing arrangements, which can accommodate tilting moments. TQI design bearings are also used for vertical rolls of universal mills. In those applications, the bearings are generally mounted with an interference fit on the roll neck by applying a bearing design with a tapered bore. In this case, a bearing with a cylindrical bore is required because the inner rings have a loose fit on their seat, and the outer rings are mounted with an interference fit in the chocks.

• With cylindrical or tapered bore.
• With or without inner ring extension on one side.

Features of four-row tapered roller bearings

• Well-allocated loads on the four-row rollers.
• Using high hardness bearing steels thus ensures better wear resistance and long work life.
• High radial and axial load capacity in two directions.
• Separable, faster, and convenient for mounting, dismounting, inspection, and maintenance.

Application of four-row tapered roller bearings

Four-row tapered roller bearings are used worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. They are mainly used in the working roll necks of hot or cold rolling mills and roll necks of cogging mills. They usually clearance fit with roll necks to being mounted and dismounted conveniently.

Company Information

We are a professional bearing exporter in China, producing many bearings in different sizes and sizes. We can provide you with excellent service in a wide range of bearings with world-class quality, such as deep groove ball bearings, spherical roller bearings, spherical ball/roller bearings, and cylindrical roller bearings, tapered roller bearings, angular contact Ball bearings, etc. Bearings can also provide OEM services according to customer requirements. We adhere to strict global standards, which is why we can provide you with a wide range of bearings of world-class quality. We have always adhered to the principle of "integrity-based, quality first, customer foremost." We are ready to use our sincerity to serve every global customer for long-term and win-win cooperation.