WPF 040 L1 -5-P2-S2 gearbox, the output shaft diameter is 8mm. It is used for 40mm AC servo motor, input diameter is 8mm.Gearbox DrawingGearbox Output TypeGearbox Performance ParametersProduct: WPF 040 L1 -5-P2-S2 gearbox for 40mm Servo motorOutput shaft diameter: 8mmInput diameter: 8mmApplication: For 40mm AC servo motor