Name: Hydraulic gear pumpModel: CBN/CBTMaterial: aluminum alloyKey type: round key, spline key, flat key optionalHydraulic gear pump:A gear pump uses the meshing of gears to pump fluid by displacement.They are one of the most common types of pumps for hydraulic fluid power applications.Gear pumps are positive displacement (or fixed displacement), meaning they pump a constant amount of fluid for each revolution.