Rexnord 3HSB1-3 Hub is a Standard Bore (HSB) steel hub designed for Rexnord elastomeric coupling assemblies. It accepts a 1.375-inch shaft bore and features a 5/16" x 5/32" keyway for secure torque transmission, plus a single stainless steel set screw to lock the shaft in place. The hub is sized for hub index 3 and provides an outside barrel diameter of 1.99 inches, enabling robust alignment within compatible Rexnord couplings. This model is identified by the Rexnord code 7300265, helping ensure correct compatibility with existing drivetrain components in industrial power transmission systems.
