Bosch Rexroth | AA2FM3261W-VSD540
AA2FM32/61W-VSD540
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The AA2FM32/61W-VSD540 fixed motor is manufactured by Bosch Rexroth for the A2FM Fixed Motors series and serves hydraulic automation systems that require constant displacement drives. It is compatible with mineral oil HLP according to DIN 51524, ensuring fluid conformity in standard power units. Geometric displacement is 32 cm³ per revolution, determining the volume moved each shaft turn, while the inlet flow at nominal conditions reaches 202 l/min so upstream pumps must match that demand. The unit operates with bidirectional rotation to enable reversible actuator movement without valve changes. During cold starts it accepts fluid viscosities up to 1600 mm²/s, protecting internal surfaces when oil is thick. A minimum uniform speed of 50 rpm secures consistent lubrication before higher speeds are applied, and the assembly tolerates a maximum pressure of 450 bar for short overload events in high-force circuits.
The motor is rated for a nominal pressure of 400 bar during continuous duty, and at that pressure it produces 204 Nm of torque for predictable output in travel or winch drives. Nominal speed is 6300 rpm, allowing use with compact gear stages, while a moment of inertia of 0.0012 kg·m² lowers energy needed for speed changes. Maximum angular acceleration reaches 6500 rad/s² to support rapid cycling in dynamic machinery, and rotary stiffness of 3.12 kNm/rad keeps shaft deflection minimal for accurate positioning. Port T temperatures can rise to 103 °C, so cooling circuits must handle this level of heat. FKM seals are installed to withstand the stated temperature and to resist the specified mineral oil, helping maintain service life under demanding conditions.
Technical Specifications
Cold Start Viscosity Max
1600 mm²/s
Direction Of Rotation
Bidirectional
Geometric Displacement
32 cm³/rev
Hydraulic Fluid
Mineral Oil HLP (DIN 51524)
Inlet Flow At Nnom
202 l/min
Max Angular Acceleration
6500 rad/s²
Max Temperature (port T, Fkm)
103 °C
Maximum Pressure
450 bar
Minimum Uniform Speed
50 rpm
Moment Of Inertia
0.0012 kg·m²
Nominal Pressure
400 bar
Nominal Speed
6300 rpm
Rotary Stiffness
3.12 kNm/rad
Seal Material
FKM
Torque At Pnom
204 Nm
1620 Old Apex Road
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