A 10 Rib Rib Convex asymmetrical roller R, RR type RZ type Machined cage Guide ring Lockwasher Locknut Locknut Lock plate RHA type (For shaker screen) Anti-rotation pin hole (Shaft diameter ² 180 mm) (Shaft diameter ³ 200 mm) Pressed cage Guide ring Center rib Inner ring Outer ring Convex symmetrical roller Convex symmetrical roller Lubrication hole Lubrication groove Large end of tapered bore diameter (u d1) Small end of tapered bore diameter (u d) Machined cage (prong type) Outer ring guided machined cage Withdrawal sleeve Adapter sleeve Adapter sleeve separable prong type 1. Rolling bearing structures and types Table 1-8 Spherical roller bearings Cylindrical bore Tapered bore Convex asymmetrical roller type Convex symmetrical roller type K or K30 R, RR RZ RHA 23900R, 23000R (RZ, RHA), 23100R (RZ, RHA), 22200R (RZ, RHA), 21300R (RZ) 24000R (RZ, RHA), 24100R (RZ, RHA), 23200R (RZ, RHA), 22300R (RZ, RHA) n Spherical roller bearings comprising barrel-shaped convex rollers, double-row inner ring and outer ring are classified into three types : R(RR), RZ and RHA, according to their internal structure. n With the bearing designed such that the circular arc center of the outer ring raceway matches with the bearing center, the bearing is self-aligning, insensitive to errors of alignment of the shaft relative to the hous- ing, and to shaft deflection. n This type can accommodate radial load and axial load in both directions, which makes it especially suitable for applications in which heavy load or impact load is applied. n The tapered bore type can be easily mounted/ dismounted by using an adapter or withdrawal sleeve. There are two types of tapered bores (tapered ratio) : · 1 : 30 supplementary code K30 ááá Suitable for series 240 and 241. · 1 : 12 supplementary code K ááá Suitable for series other than 240 and 241. n Lubrication holes, a lubrication groove and anti- rotation pin hole can be provided on the outer ring. Lubrication holes and a lubrication groove can be provided on the inner ring, too. [Recommended cages] Copper alloy machined cage, pressed cage [Main applications] Paper manufacturing equipment, speed reducers, railway rolling stock axle journals, rolling mill pinion stands, table rollers, crushers, shaker screens, printing equipment, wood working equipment, speed reducers for various industrial uses, plummer blocks