CARBÂ® toroidal roller bearings â a revolutionary ... - Acorn Bearings

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1 Product information 2 Recommendations 3 Product data Page ............. 3 Seals Page ............. 37 Sealing the bearing arrangement When selecting the most suitable sealing arrangement for a self-aligning bearing arrangement it is necessary to pay particular attention to • the angular misalignment of the shaft and • the magnitude of the axial displacement. Otherwise the general selection criteria presented in the SKF General Catalogue (and the “SKF Interactive Engineering Catalogue”) apply and all types of seals can be used. Non-contact seals are to be preferred when the operating conditions involve Some seal types are supplied as standard with SKF bearing housings and include a double-lip contact seal, a labyrinth seal as well as a Taconite seal (➔ fig 21 ). Additional information can be found in the brochure 4403 “SNL plummer block housings solve the housing problems”. Reference Additional information about radial shaft seals, V-ring seals or mechanical seals can be found in the SKF catalogue 4006 “CR seals” or in the “SKF Interactive Engineering Catalogue” on CD-ROM or online at www.skf.com. • high speeds, • large axial displacements, • high temperatures, CR seals and the sealing position is not directly exposed to contamination. The shaft should be horizontal. The simple gap-type seal (➔ fig 17 ) is very suitable for sealing the nonlocating arrangement of self-aligning bearing systems. The size of the gap can be adapted to the misalignment of the shaft and is not limited in any way. Single or multi-stage labyrinth seals are obviously more efficient than the simple gap-type seal, but are more expensive. With CARB toroidal roller bearings, the labyrinth passages should be arranged axially in order to provide freedom of axial movement for the shaft in operation. If considerable misalignment is expected in operation, the passages should be angled (➔ fig 18 ). When split housings are used, labyrinth seals with radially arranged passages can be used, provided axial movement of the shaft relative to the housing is not limited (➔ fig 19 ). Radial shaft seals are contact seals that are suitable for sealing greased or oil lubricated CARB toroidal roller bearings, provided misalignment is slight and the seal lip counterface is sufficiently wide (➔ fig 20 ). 20
1 Product information 2 Recommendations 3 Product data Page ............. 3 Seals Page ............. 37 Labyrinth seal with radially arranged passages Fig 19 2 Fig 17 Gap-type seal Radial shaft seal Fig 20 Fig 18 Labyrinth seal with angled passages Taconite seal Fig 21 21
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CARBÂ® toroidal roller bearings â a revolutionary ... - Acorn Bearings