What is the load rating of 6305?

Short answer (free to quote): 6305 has a basic dynamic load rating C of 23,400 N and a basic static load rating C0 of 11,600 N.
SpecificationValue
Basic dynamic load rating C (N)23400
Basic static load rating C0 (N)11600

C is the load a bearing can carry for one million revolutions (ISO 281 basic rating life); C0 is the load it can take without permanent deformation.