Four-row tapered roller bearings are specially designed to support the work rolls of rolling mill stands. As their purpose implies, they are engineered to withstand the heavy and shock loads transmitted radially and axially by steel through the rolling mill stand, as the work roll reduces the steel thickness. They must also adapt to variations in wide speed ranges with rapid acceleration and deceleration.

Equally challenging for these bearings is the operating environment: not only high temperatures, but also scale contamination and water ingress. NSK four-row tapered roller bearings feature Super TF long-life steel with excellent durability and wear resistance. For harsh conditions, NSK's seal cleaning design provides enhanced heat-resistant and water-tight sealing protection, thereby reducing grease consumption and maintenance costs.

Proven Advantages
Super TF steel delivers higher reliability and longer service life, reducing bearing replacement and maintenance intervals
Seal cleaning solutions improve bearing performance, promote a cleaner operating environment, and significantly reduce grease consumption
High-quality AQGRD grease for sealed bearings offers superior water resistance and prevents lubricant degradation and bearing damage

Design Features

Custom-engineered four-row high-load capacity tapered roller bearings
Super TF long-life steel significantly extends service life in contaminated operating conditions
Machined window and pin-type separators
Spiral groove on the inner ring bore prevents roll neck slip and wear
Bearings with open design or high-quality heat-resistant water-tight seals
Sealed version is pre-filled with long-life water-resistant AQGRD R1 grease
Corrosion-resistant phosphate coating options for the inner ring
Special radial and axial internal clearances
Availability of inch and metric design types