SLC45EC - RHP Cast Iron Cartridge Bearing Unit - 45mm Shaft Diameter 7320bmpua The 2RS1 suffix indicates that

The 2RS1 suffix indicates that the bearing is sealed with synthetic rubber (NBR) on both sides

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SLC45EC - RHP Cast Iron Cartridge Bearing Unit - 45mm Shaft Diameter 7320bmpua The 2RS1 suffix indicates thatThis SLC45EC bearing is a Cast Iron Cartridge Bearing Unit with an eccentric collar lock and a short inner ring. The bearing's dimensions are 45mm Shaft Diameter. SLC 45 EC 1245 45ECG 7 Self Lube Cast Iron Cartridge Bearing Unit 45mm Shaft Diameter Eccentric Collar Lock Short Inner Ring Bearing Insert Casting Group