Application & Design

The SKF 3188-S is a tapered roller bearing engineered for automotive drivetrain service, commonly used in differential pinion positions, including classic MG applications such as the MGB (circa 1963–1968). Manufactured to exacting tolerances, it installs with the proper fit required to maintain gear mesh and preload, supporting consistent contact patterns and long bearing life. Tapered geometry allows the bearing to carry combined radial and axial loads typical of pinion locations. The compact envelope (2.9 in × 2.9 in × 1.5 in) and low mass (0.84 lb / 0.39 kg) simplify handling and installation in tight housings. Supplied as new aftermarket inventory, the 3188-S helps service operations restore original performance in legacy drivetrains.

Construction & Performance

Built from heat-treated high carbon steel, the 3188-S provides high load capacity and wear resistance in demanding duty cycles. SKF’s logarithmic roller raceway profiles and ultra-smooth surface finishes promote stable load distribution, reduced friction, and quiet operation at driveline speeds. Precision manufacturing supports consistent preload and endplay settings, helping minimize heat generation and extend lubricant life. For maintenance planning and sourcing flexibility, the 3188-S cross-references with common industry numbers including Timken 3188S and NTN 4T-3188S. Whether maintaining a classic MG differential or servicing comparable automotive pinion locations, this bearing delivers SKF’s quality-focused manufacturing to support reliable, repeatable rebuild outcomes.