The Double Duty Seal

Rota-Seal is an all rubber, self-adjusting, shaft mounted radial lip seal. Its design keeps lubricants within bearing areas while excluding contaminants, ensuring safe and efficient operation.

Design and Construction

Rota-Seal incorporates a tough but flexible hinged lip which seals axially against a radial (perpendicular) face. Compression molded of FLUIDOL custom elastomers, Rota-Seal is highly resilient, fluid resistant and exhibits low wear characteristics.

Rota-Seal requires no special machining for a tight fit around the shaft and cannot fret or groove expensive shafts like conventional spring loaded oil seals.

Simple Installation

Rota-Seal can be stretched over shaft obstructions and pressed firmly against the radial face. After the shaft is set in operation, Rota-Seal self-adjusts after the first several rotations. Once adjusted, Rota-seal will not "back-off" its position and automatically vents excess grease during re-greasing operations.


When designing Rota-Seal as an excluder and isolator for bearings or oil seals, the outer race or stamped metal case of oil seal may be suitably employed as the dynamic surface. If, due to space or other considerations, this cannot be done, a machined surface of 125 µ in. RMS max is recommended. Please contact us when considering applications with shaft speeds in excess of 1800 FPM (RPM x Shaft Dia. x .262).