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An Intro to Gear Pumps


The heart of your hydraulic system

By Mathew League                                                    The heart of any hydraulic system is the hydraulic pump. The pump is responsible for moving the fluid through your hydraulic system, and building the pressure required to perform the work required. There are several types of hydraulic pumps, but the simplest and least expensive is the gear pump. A gear pump operates by having two gears that mesh together, one of which is connected to the inlet shaft. The fluid is drawn into the inlet and pulled around the outside of the two gears between the gear teeth and the body of the pump. Once the fluid has reached the outlet side of the pump, the fluid is forced out the outlet port from the force created by the teeth of the gears meshing back together.
When sizing a gear pump for your application, several factors must be considered including, but not limited to:
• Output flow required at a given driven RPM or pump displacement per revolution
• Shaft size and coupling method (Keyed, Splined, etc.)
• Inlet and Outlet location and sizing capable of handling the needed flow
• Single rotation or dual rotation
• Pump mounting size and type


 At Austin Hose, we have a wide variety of hydraulic pumps as well as the ability to repair most anything hydraulic. Our Power Services division has some of the most experienced and well-trained mechanics in the industry. Reach out to us via website, social media or through an email for a quote or any questions you may have.