TAILIEUCHUNG - NTN, BALL AND ROLLER BEARING CATALOG Part 12

Tham khảo tài liệu 'ntn, ball and roller bearing catalog part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Spherical Roller Bearings NTN 1. Types construction and characteristics Spherical roller bearings consist of an outer ring having a continuous spherical raceway within which operates two rows of barrel-shaped rollers which are in turn guided by an inner ring with two raceways separated by a center rib. Refer to Diagram 1 This bearing has self-aligning properties and therefore is suited for use where misalignment between the inner and outer rings occurs from housing installation error or shaft flexure. Spherical roller bearings have a large capacity for radial loads axial loads in either direction and complex loads. They are also suited for applications where vibration and shock loads are encountered. When operating under axial loads however it is desirable to maintain conditions so that Fa Frắ2e in order to prevent sliding movement along the row of rollers not receiving the axial load. For the value of e refer to dimension tables. As shown in Table 1 in addition to standard type there are various other types of spherical roller bearings. Among these Type E has a particularly high load capacity. In addition to bearings with cylindrical bore diameters those with tapered bore diameters are also available. Bearings with tapered bore diameters are specified by attaching the suffix K to the end of the bearing s basic number. The standard taper ratio is 1 12 for bearings with a K suffix but for bearings in series 240 and 241 the suffix K30 indicates the taper ratio for a bearing is 1 30. Most tapered bore bearings incorporate the use of adapters and withdrawal sleeves for shaft mounting. Diagram 1. Allowable misalignment Table 1 Types of spherical roller bearings Type Standard type B type C type 213 type E type Construction Bearing series Does not include C type Series 222 223 and 213 with bore dia. of 50 mm or less series 24024 to 24038. Series 213 with bore dia. of 50 mm or more Series 22211 to 22218 Rollers Asymmetrical Symmetrical Asymmetrical Symmetrical Roller .

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