Rexroth R909831178 SHAFT SEAL

Key Specifications

• Manufacturer: Bosch Rexroth
• Part Number (MPN): R909831178
• Model Designation: WDR BAFSL1SF 50X 72X 7/5-FKM
• Seal Design Type: BAFSL1SF (High-pressure radial lip profile with metal cage)
• Material Composition: FKM / Viton
• Physical Dimensions: Inside Diameter (ID) = 50 mm | Outside Diameter (OD) = 72 mm | Height/Width = 7 mm / 5.5 mm

Product Overview

The Bosch Rexroth Shaft Seal is a genuine OEM high-pressure radial lip seal engineered specifically for heavy-duty hydraulic pumps and motors. Featuring a premium BAFSL1SF design with an open-front metal insert, this shaft seal ensures stable housing retention and handles elevated working pressures. Molded from high-performance FKM (Viton) fluoroelastomer, it provides superior resistance to hydraulic oils, high rotational speeds, and elevated temperatures. Replacing a worn seal stops front-shaft oil weeping, prevents system pressure drops, and blocks external contaminants from invading the pump’s internal bearings.