Mono Ball Bearing - 3/4 ID x 1.4375 OD PTFE

The QA1 Mono Ball Bearing - 3/4 ID x 1.4375 OD PTFE is a precision spherical bearing engineered for high-performance suspension and drivetrain applications where controlled articulation and durability matter most. Built for enthusiasts and fabricators who demand reliability in custom chassis builds, drag racing setups, and street performance vehicles, this bearing serves as a critical pivot point in control arm assemblies, rod ends, and suspension links. Its compact 0.750-inch bore diameter and robust outer diameter accommodate tight installation spaces while maintaining load capacity for demanding driving conditions.

This bearing features a steel construction with PTFE (polytetrafluoroethylene) lining, a material choice that reduces friction, minimizes binding, and provides corrosion resistance superior to traditional rubber or bronze bushings. The mono ball design—a single spherical element captured in a steel race—allows smooth omnidirectional movement while maintaining structural integrity under lateral loads and vibration. The PTFE liner eliminates the need for constant greasing, making maintenance intervals longer and reducing contamination risk in sealed suspension systems. At just 0.2 lbs and measuring 2.85 x 1.2 x 3.15 inches, it fits seamlessly into weight-sensitive builds without sacrificing strength or performance characteristics.

Street rod builders, road course competitors, and off-road fabricators rely on QA1 bearings for repeatable suspension geometry and predictable handling response. The 3/4-inch ID accommodates standard rod end studs and bolt configurations common in aftermarket control arms and panhard bars, making it a direct replacement or upgrade option for both restoration projects and modern performance platforms. Installation requires standard mechanical skills and basic tools; ensure proper alignment during mounting to maximize bearing life and eliminate noise or play. Compatible with most tube chassis, independent suspension designs, and custom fabrication work where precision articulation elevates driving dynamics and suspension reliability.