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Four-Row Cylindrical Roller Radial Bearings FAQS

QWhat is features of four-row cylindrical roller bearings?

AExceptional high load carrying capacity Because of their high number of rollers, four-row cylindrical roller bearings are suitable for very heavy radial loads. Low friction (Roller end / flange contact area) The open flange design (fig. 1), together with the roller end design and surface finish, promote lubricant film formation resulting in lower friction. Long service life The logarithmic roller profile reduces edge stresses at the roller/raceway contact (fig. 2) and sensitivity to misalignment and shaft deflection. Enhanced operational reliability The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film. Separable and interchangeable The separable components of SKF four-row cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections. High speed capability The cage designs are suitable for high speeds, rapid accelerations and peak loads. Low cross-sectional height The low cross-sectional height of four-row cylindrical roller bearings allows for relatively large roll neck diameters compared to the roll diameter.

QWhat is Cylindrical Roller Radial Bearing?

ACylindrical Roller Bearings are designed to carry heavy radial loads. These bearings are made with a single row, two rows, or multi-rows of rolling elements to meet an application's radial load requirement. Available in many standard series and configurations, they are widely used in multiple industries. The combination of high load capacity, moderate speed rating, and industry interchangeability make it one of the most popular bearing designs. These are produced in ISO series metric, ABMA series metric and inch, journal type, Full Complement series, multi-row series, and cluster mill sizes. These bearings are dimensionally interchangeable to same numbered and sized bearings in the industry. Components of journal bearings and other standard series are made interchangeable with other manufacturer's components. Many mounting arrangements can be achieved with the multiple configurations available with same load capacity for a given I.D., O.D. and width.

QWhat is Single row Cylindrical roller bearing?

ASingle row Cylindrical Roller Bearings are designed to support heavy radial loads and are some of the most common bearings used around the world. These roller bearings consist of an Outer Race, Bronze or Steel Cage, a complement of rollers, and usually an Inner Race. They are available in ISO and ABMA series. The ISO series is metric dimensioned, with a brass cage. Bearings designated with the “E” suffix are Extra Capacity. They are re-designs of original geometry that increase radial load capacity. These bearings are designed to be dimensionally interchangeable with the same basic size of other manufacturers and are supplied with C3 internal radial clearance unless specified. The ABMA series are metric or inch dimensioned and interchangeable with other manufacturers as well. They are supplied with a machined brass cage or an alternate cage of machined steel (SM) or stamped steel (SS) when needed. The standard internal radial clearance provided is designed to allow interference fit of inner race while keeping the bearing free mounted. The large assortment of Inner and Outer Race configurations lend to their widespread use in electric motors, gearboxes, and general industry applications.

QWhat is Roller thrust bearings?

ARoller thrust bearings carry pure thrust, or axial, loads with little or no radial forces. They use barrel-shaped rolling elements to carry single- or double-direction thrust loads. These rollers have a length perpendicular to the shaft and have different shapes that affect the bearing's efficiency. The two rings on roller thrust bearings, called washers, are also configured with different shapes and designs. They can be flat, grooved, tapered, concave, convex, or grooved. There are several different types of roller thrust bearings. Cylindrical roller thrust bearings contain slightly crowned rollers that work well in one-direction thrust applications. Needle roller thrust bearings contain long, thin cylindrical rollers in a spoke-like configuration. Tapered roller thrust bearings contain conical rollers for single- or double-direction thrust loads. A tapered raceway matches each side of the rollers for smooth rolling motion. Spherical roller thrust bearings contain contoured rollers arranged in a steep, angular position. Spherical roller thrust bearings are self-aligning and capable of accommodating shaft misalignment.