Timken's four-row cylindrical roller bearings are designed for applications such as medium and high speeds, high radial loads, high temperatures and heavy contamination. This type of bearing has a well-balanced cross-sectional design, so it can withstand a strong radial load with a certain external size. Applications Timken's four-row cylindrical roller bearings are primarily designed for rolling mill roll neck applications and are often used on work or backup rolls in flat product, long product, and structural steel mills. Product features The existing size is 140 mm (inner diameter) ~ 2000 mm (outer diameter) Carburized steel inner and outer rings, the roller durability is enhanced The inner ring can be replaced separately The outer dimension is P6 accuracy, the runout accuracy is P5 The roller shape can be customized according to the user Custom designed and manufactured for optimum performance Available in both straight and tapered bores. Its design advantage is that the most common types are RY, RYL and RX. Timken can also design and manufacture according to customer's special size and application requirements. If your bearing is for a new rolling mill application, our engineers will work with you in the initial design stages to help you select the most suitable bearing. Internal Radial Clearance (RIC) Timken's standard bearings provide different clearance values, such as C3 or C4 clearance according to DIN620-4 standard, Timken can also provide tapered bore products according to your application requirements . There are two types of inner rings produced by Timken: one is the outer diameter of the inner ring without pre-grinding, and the other is the outer diameter of the inner ring with reserved grinding. After the inner ring with reserved grinding amount is installed on the roll, the operator performs fine grinding on the inner ring to improve the running accuracy of the roll. These bearings and inner rings have the designation suffix CF. Lubrication Timken's four-row cylindrical roller bearings can be used with grease, air, oil mist or circulating oil systems. Bearings must be properly lubricated through lube grooves and holes in the outer ring or grooves in the end face of the outer ring for optimum performance. Materials Our bearings are designed for excellent dimensional stability, fracture toughness and reliability. Through the use of high-quality carburized alloy materials and a special heat treatment process, our products in roll applications can adequately handle the high stresses and shock loads that must be carried by multi-row cylindrical roller bearings.