Bosch Rexroth | AA11VLO145LG1H111L-NSD62K07
AA11VLO145LG1H1/11L-NSD62K07
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The AA11VLO145LG1H1/11L-NSD62K07 variable pump is built by Bosch Rexroth for the A11V Variable Pumps series. It supplies hydraulic actuators in automated systems where variable flow is required. The unit displaces 145.0 cm³ per revolution, and at its nominal speed of 2500 rpm this yields a flow of 363 l/min. At the same operating point and with a pressure differential of 350 bar, it provides 211 kW of hydraulic power. The nominal pressure rating is 350 bar, while the casing tolerates up to 400 bar for brief peaks. When set to maximum displacement, it produces 808 Nm of torque, so drive sizing must account for that load. A bare unit without a through-drive weighs 73 kg, which supports installation on medium-frame power packs.
The internal case volume is 2.9 L, providing oil storage for bearing lubrication and heat transfer. With an external charge pump, the inlet pressure can vary between 0.6 and 2 bar absolute, preventing cavitation at high speed. The rotating group sustains angular acceleration up to 9000 rad/s², and the hydraulic circuit may experience pressure ramps as steep as 16000 bar/s. Rotational dynamics are influenced by a moment of inertia of 0.036 kg·m², so rapid starts require adequate motor reserve. A stroke limiter actuates at a 25 bar differential to restrict swashplate travel under light load. Control electronics need only 0.9 l/min in the Lg1 pilot line to adjust displacement continuously.
Technical Specifications
Case Volume (per Pump)
2.9 L
Flow At Nominal Speed (per Pump)
363 l/min
Geometric Displacement (per Pump)
145.0 cm3/rev
Inlet Pressure Max (with Charge Pump)
2 bar(abs)
Inlet Pressure Min (with Charge Pump)
0.6 bar(abs)
Lg1 Control Flow Requirement
0.9 l/min
Max Angular Acceleration (per Pump)
9000 rad/s²
Max Rate Of Pressure Change
16000 bar/s
Maximum Pressure
400 bar
Moment Of Inertia (jtw, Per Pump)
0.036 kg·m²
Nominal Pressure
350 bar
Nominal Speed (per Pump)
2500 rpm
Power At Nominal Speed, Δp=350 Bar (per Pump)
211 kW
Stroke Limiter Δp (h1)
25 bar
Torque At Vgmax, Δp=350 Bar (per Pump)
808 Nm
Weight (per Pump, No Through-drive)
73 kg
1620 Old Apex Road
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