Bird Cage Splined Insert

The Bird Cage Splined Insert is a precision bearing component engineered for heavy-duty drivetrain and differential applications where splined engagement and load distribution are critical. This aluminum insert assembly is designed for technicians, automotive builders, and high-performance enthusiasts who demand reliable torque transfer and extended service life. The birdcage design—a proven architecture in limited-slip differentials and specialty gearboxes—provides superior lateral stability and wear resistance compared to traditional solid inserts.

Manufactured from aluminum and finished in durable black anodizing, the Bird Cage Splined Insert features a 1.75-inch inner diameter with 27 splines for secure, repeatable engagement. The dual bearing design accommodates a 1.968-inch bearing ID, distributing radial loads evenly across both bearing surfaces to minimize deflection and extend component longevity. The splined geometry ensures positive engagement without slippage, critical for maintaining gear ratio consistency under acceleration and load cycling. Black anodizing provides corrosion resistance and protection against oxidation, essential in high-moisture or salt-exposure environments.

This insert is ideal for rebuild and restoration projects in limited-slip differentials, performance transmissions, and specialty automotive assemblies where OEM or equivalent components are required. Installation requires proper alignment with matching spline hubs and bearing surfaces; technicians should verify bore and spline dimensions against original equipment specifications before fitment. The compact 3.05 x 1.8 x 4-inch profile and 0.14-pound weight make handling and installation straightforward, reducing downtime during drivetrain service or upgrade work.