Ingersoll Rand 39311519 Shaft Oil Seal

The Ingersoll Rand 39311519 shaft oil seal is a precision-engineered sealing component designed for rotary screw air compressor air ends. It utilizes a dual-lip PTFE (polytetrafluoroethylene) construction to maintain effective sealing between the rotor shaft and compressor housing under continuous high-speed rotation and elevated temperature conditions. This seal accommodates a shaft diameter of 107.95 mm (4.250 inches) with an outside diameter of 133.5 mm and a cross-section width of 9.5 mm. The PTFE lip material provides low friction coefficients, chemical resistance to synthetic compressor lubricants, and thermal stability across the operating envelope of industrial screw compressors. The part serves as a direct replacement for Ingersoll Rand OEM part number 39311519 and is installed during scheduled air end overhauls or when shaft seal leakage is detected. Proper installation requires clean mounting surfaces, correct lubrication of sealing lips, and adherence to specified torque values for retainer fasteners to prevent premature failure.