AA10VG18HD31/10R-NSC66F025S-S

The AA10VG18HD31/10R-NSC66F025S-S variable piston pump belongs to the A10VG Variable Piston Pumps series and is manufactured by Bosch Rexroth. It is designed to supply hydraulic actuators with adjustable flow for mobile or industrial automation circuits. The main displacement of 18 cm³ per revolution sets the base volume delivered for each shaft turn, enabling proportional flow control when the swashplate angle changes. An integrated boost pump adds 5.5 cm³ of displacement to maintain charge pressure in the closed circuit and prevent cavitation at low inlet conditions. The nominal pressure rating of 300 bar indicates the continuous operating limit, while a peak pressure of 350 bar accommodates short-term load spikes without damaging the rotating group. At maximum displacement and speed the unit provides up to 72 L/min, giving adequate capacity for medium-size hydraulic functions. Continuous running is allowed to 4000 rpm, and an intermittent ceiling of 5200 rpm supports quick response during transient duty. Installation aligns with an SAE J744 101-2 (B) mounting flange, ensuring interchangeability with standard prime movers.

Dynamic performance is defined by a maximum angular acceleration of 6800 rad/s², so the pump can follow rapid drive commands without overshoot in closed-loop controls. A torque demand of 86 Nm at 300 bar quantifies the load placed on the prime mover under rated working pressure. The permissible input torque of 192 Nm establishes the mechanical limit for the shaft, and a through-drive torque capacity of 112 Nm allows an additional pump or accessory to be piggy-backed without overstressing the spline. The rotating group carries a moment of inertia of 0.00093 kg·m², keeping start-up energy low and aiding quick speed changes. Power draw reaches 36 kW at 300 bar, which helps system designers size the engine or electric motor accurately. A case filling capacity of 0.45 L provides enough oil to lubricate and cool internal bearings while also acting as a reservoir for thermal expansion. Together these values describe the loading, energy, and lubrication requirements the pump imposes on a hydraulic circuit.