Gear 20 degree 16 tooth 15.5mm bore with keyway in

gear (circular_pitch=374.00,
    gear_thickness = 8.33,
    rim_thickness = 7,
    hub_thickness = 8,
    circles=0,
    pressure_angle=20,
    number_of_teeth=16,
    bore_diameter=15.5,
    keyway=false,
    keytooth=true);