Bosch Rexroth | AZ-M-F-12-011-URR12ML-SO018
AZ-M-F-12-011-URR12ML SO018
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The AZ-M-F-12-011-URR12ML SO018 belongs to the AZMF External Gear Motors series produced by Bosch Rexroth for hydraulic automation systems that call for compact, fixed-displacement power sources. Its displacement of 11.0 cm³ per revolution defines the volumetric flow each shaft rotation supplies to downstream actuators. Continuous operation is allowed between 500 min⁻¹ and 3500 min⁻¹, a speed range that supports low-speed control as well as high-speed circuits. Universal rotation direction lets the same unit function on clockwise or counter-clockwise drives without modification. The shaft seal is formed with NBR material, providing resilience against standard petroleum-based hydraulic oils. Fluid temperatures up to +80 °C can be tolerated, enabling use with reservoirs exposed to warm return flow. An axial drain port in the rear cover routes case leakage directly to tank, while the M12 × 1.5 thread on that port simplifies the choice of fittings.
The motor withstands ambient conditions from −30 °C to +80 °C, so it can be installed in mobile or outdoor machinery that encounters seasonal temperature swings. A contamination class of 19/16 (b20 = 75) specifies the cleanliness level the system filter must maintain to avoid premature wear. Permitted fluid viscosity spans from 12 mm²/s to 800 mm²/s, but optimum efficiency lies in the recommended 20 mm²/s to 100 mm²/s band. For cold starts, the design accepts fluid as thick as 2000 mm²/s for brief periods, protecting the gear set until oil warms. These viscosity limits guide oil selection and heater sizing. With these environmental, cleanliness, and viscosity parameters respected, the unit delivers consistent flow and pressure without cavitation or excessive internal leakage.
Technical Specifications
Ambient Temperature Max
+80 C (NBR)
Ambient Temperature Min
-30 C (NBR)
Contamination Class (iso 4406)
19/16 (b20=75)
Displacement
11.0 cm3/rev
Drain Port Thread
M12x1.5
Fluid Temperature Max
+80 C (NBR)
Max Rotation Speed
3500 min-1
Min Rotation Speed
500 min-1
Rear Cover Feature
Drain Port Axial
Rotation Direction
Universal
Seal Material
NBR
Viscosity Permitted Max
800 mm2/s
Viscosity Permitted Min
12 mm2/s
Viscosity Recommended Max
100 mm2/s
Viscosity Recommended Min
20 mm2/s
Viscosity Starting Max
2000 mm2/s
1620 Old Apex Road
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