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The bore size (Inner Diameter). For digits above 03, multiply by 5 to get the size in mm (e.g., "05" = 25mm).

If replacing an existing part, use the identification code typically stamped on the ring. buy ball bearings online

"ZZ" means two metal shields; "2RS" means two rubber seals. The bore size (Inner Diameter)

Forces acting perpendicular to the shaft (e.g., wheels, pulleys). Deep groove ball bearings are standard for light to medium radial loads. buy ball bearings online