X4F aluminum layshaft is strategically CNC-machined to attenuate rotating weight without compromising energy or integrity. The accuracy layshaft minimizes runout, eliminating drivetrain vibration and creating an optimistic stability. The layshaft includes two exchangeable bearings to further reduce drivetrain vibration. The composite gear pulley key sturdily towards the layshaft, and the completed construction is installed on the motor mountââ¬â¢s steel layshaft axle. Machined from premium Swiss 7075 T6 aluminum and black colored anodized. Fits X4F