Product Structure

The SG20 RS bearing belongs to the metric miniature deep groove ball bearing series. Its model code is interpreted as: "SG" may indicate a specific series or brand prefix; "RS" indicates that the bearing is equipped with a contact rubber seal (usually NBR Nitrile) on one side. The bearing features a standard deep groove raceway design, comprising an outer ring, an inner ring, a set of steel balls, and a cage (typically stamped steel or engineering plastic). The RS seal is in close contact with the inner ring, effectively preventing grease leakage and the ingress of external contaminants.

Key Performance Features of SG20 RS

The main features of the SG20 RS bearing lie in its compact design and effective single-side sealing. The rubber seal (RS) provides excellent protection against dust and grease leakage, extending the bearing's service life in slightly contaminated environments. It has a simple structure, relatively low friction torque, operates smoothly and quietly, and can withstand moderate radial loads and bidirectional axial loads. The pre-filled grease allows for ready-to-use operation with low maintenance requirements. Its miniature size makes it ideal for space-constrained applications.

Main Application Scenarios

The SG20 RS bearing is commonly used in miniature transmission applications requiring protection against dust, fibers, or slight moisture ingress. Examples include: support shafts in small gearboxes, fan motor rotors, small conveyor belt rollers, pulleys in fitness equipment, guide wheels in automation devices, transmission parts in power tools, wheel axles in toys, and high-speed rotating spindles in instruments. Its sealing protects the internal lubrication, ensuring durable and stable operation in these scenarios.

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