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The SKF 61818-2RS1 sealed thin-section deep groove ball bearing supports large-diameter rotating shafts where the available bearing space is limited. Its 618 series construction has a substantially smaller cross-section than conventional 60, 62 or 63 series bearings with the same bore, making it useful for lightweight housings and compact mechanical designs. The single row ball arrangement accommodates radial loads and moderate axial forces in either direction, subject to its rated capacity. SKF catalogue data gives a basic dynamic load rating of 19.5kN and a sealed limiting speed of 3,200rpm. These specifications help engineers evaluate bearing life and rotational suitability, particularly where higher-capacity, wider bearings cannot be accommodated.
The 2RS1 rubber contact seals help retain factory grease and restrict dust and moisture from reaching the raceways, making the bearing suitable for enclosed equipment with limited relubrication access. Unlike an open or non-contact sealed version, this arrangement introduces additional seal friction, so continuous speed and heat generation require consideration. Normal radial internal clearance must be assessed against shaft interference fits, housing tolerances and temperature differences. With only 12.5mm of radial section, the bearing rings also require uniform support and carefully controlled mounting forces to avoid distortion. Select this version where compact dimensions, contact sealing and verified load suitability are more important than maximum carrying capacity.
Typical Applications:
Large-bore rotary positioning mechanisms
Space-restricted industrial shaft assemblies
Precision indexing and automation equipment
Lightly loaded rotary handling systems
Specialised machinery with narrow bearing housings
