Sealed Spherical Roller Bearings
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Sealed Spherical Roller Bearings With reliable protection against contamination

Contents Page Design and safety guidelines Dimension tables Application examples Schaeffler Technologies

Sealed spherical roller bearings Spherical roller bearings are double row, self-retaining units comprising solid outer rings with a concave raceway, solid inner rings and barrel rollers with cages. The inner rings have cylindrical or tapered bores. The symmetrical barrel rollers orient themselves freely on the concave outer ring raceway. As a result, shaft flexing and misalignment of the bearing seats are compensated. Sealed spherical roller bearings are characterised by: ■ very high basic dynamic and static load ratings ■ lower frictional torque compared to the competition ■...

Spherical roller bearings of series 222, 223, 230, 231, 232 The sealed spherical roller bearings are fitted, depending on the series, with different sealing concepts. Features of the sealing concept of sealed spherical roller bearing series 222, 223, 230, 231, 232 are as follows: ■ bearings with an oversize width are identified by the prefix WS (WS = Wide Size). As standard, this applies to the series 222 and 223. Example: WS22215-E1-2RSR. The remaining sealed spherical roller bearings of the series 222, 223, 230, 231 and 232 are allocated an F- number and have the main dimensions of the...

Sealed spherical roller bearings Spherical roller bearings of series 240 and 241 Features of the sealing concept of sealed spherical roller bearing series 240 and 241 (with the exception of F-803042) are as follows: ■ main dimensions identical to those of the open bearing, allowing simple interchange ■ basic load ratings identical to those of an open bearing ■ X-life design ■ sealing washers are interchangeable ■ internal bearing design with sheet steel cage and loose central rib ■ greasing with a lubricant KP2R–30 in accordance with DIN 51502 recommended by FAG for a temperature range of...

Example Closed outer ring Circumferential groove 24028-E1-2VSR and three lubrication holes, relubrication facility Figure 2 Sealing concept of series 240 and 241, closed outer ring Schaeffler Technologies Figure 3 Sealing concept of series 240 and 241

Sealed spherical roller bearings Product range The product range and sealing concept covers a bore diameter of 120 mm to 220 mm. Sealing concept The sealing concept is available for: ■ series 240 with a bore diameter of 120 mm to 200 mm ■ series 241 with a bore diameter of 110 mm to 220 mm. Potential savings In continuous slab casting plants, sealed spherical roller bearings are fitted as locating bearings and as non-locating bearings, Figure 4. Figure 4 Fitting example ᕃ Locating bearing ᕄ Non-locating bearing Schaeffler Technologies

The following comparison from the continuous casting sector shows the savings that are possible by the use of sealed spherical roller bearings instead of open bearings. The grease costs for relubrication of an open bearing and a sealed bearing (seal lubrication of the housing) were taken into consideration along with the specific disposal and separation of the grease from the cooling circuit. Due to the lower maintenance outlay and the generally longer life of the sealed spherical roller bearing, the higher purchase price compared to the open bearing is recouped after only a short time. An...

Sealed spherical roller bearings Design and safety guidelines Equivalent dynamic bearing load Load ratio and equivalent dynamic load The equivalent dynamic bearing load P is valid for bearings that are subjected to radial and axial dynamic loads. It gives the same rating life as the combined bearing load occurring in practice. For bearings under dynamic loading, the following applies: Load ratio Equivalent dynamic bearing load P = Fr + Y1 · Fa P = 0,67 · Fr + Y2 · Fa Fa N Axial dynamic bearing load Fr N Radial dynamic bearing load P N Equivalent dynamic bearing load for combined load e, Y1,...

Rolling bearing reconditioning During the maintenance of machinery and plant, many rolling bearings are taken out of service and replaced by new ones as a precaution. In some cases, this safety-conscious approach blocks any appreciation of the potential cost savings. The fact is: reconditioned bearings generally give the same performance as new ones. The reconditioning of rolling bearings and rolling bearing units is one of the core competences of the service arm of Schaeffler Group Industrial and is offered at several certified locations worldwide. Our services for rolling bearings of all...

Sealed spherical roller bearings Cylindrical bore Dimension table · Dimensions in mm Mass Designation Open X-life The dimensions only apply to sealed spherical roller bearings. Wider than the open standard bearing. Schaeffler Technologies

Mounting dimensions Calculation factors Basic load ratings Fatigue limit load Schaeffler Technologies

Sealed spherical roller bearings Cylindrical bore Dimension table (continued) · Dimensions in mm Mass Designation Open X-life The dimensions only apply to sealed spherical roller bearings. Wider than the open standard bearing. Schaeffler Technologies

Mounting dimensions Basic load ratings Calculation factors Fatigue limit load stat. Schaeffler Technologies

Continuous casting plant In continuous casting plant, the cast strand is supported by rolls. In order to restrict deflection, the rolls are supported at several points along their length by rolling bearings. These bearings are subjected to high loads, low speeds, spray water and high temperatures. Spherical roller bearings of sealed design are used to support the rolls. Figure 1 Continuous casting plant The demands on the design are: ■ high static load carrying capacity ■ maximum resistance to the ingress of foreign matter. Schaeffler Technologies

Sealed spherical roller bearings E1 offer a high standard of reliability, cost-efficiency and technical performance capacity in the metal-producing and metal-processing industry. Due to the particularly compact bearing seals in series 240 and 241, the internal construction used can be the same as in the open type. The advantages of the field tested X-life design are now also accessible for sealed spherical roller bearings. The external dimensions of course remain identical to those of the unsealed variant. The extremely reliable sealing arrangement using a high temperature elastomer (FKM)...