Bosch Rexroth | SRMCR5D380L50Z32A0M1L01
SRMCR5D380L50Z32A0M1L01
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The SRMCR5D380L50Z32A0M1L01 radial piston motor is produced by Bosch Rexroth as part of the MCR Radial Piston Motors series and converts hydraulic energy into rotary motion for mobile or stationary drives. The motor delivers a displacement of 380 cm³ per revolution, which defines the volume of fluid required for each shaft turn. A specific torque of 6 Nm per bar allows torque to increase linearly with pressure for predictable control. The unit tolerates a maximum differential pressure of 450 bar to handle high load cycles. Under this pressure, peak torque reaches 2722 Nm, enabling direct drive of wheels or drums without additional gearing. A 50 mm parallel-keyed drive shaft transmits the load to external couplings while supporting standardized hub connections. Continuous operation is limited to 475 rpm to balance hydraulic efficiency and bearing life, and the assembly weighs 39 kg, which influences mounting considerations on the machine frame.
The hydraulic interface relies on 1 1/16-12 UNF ports for inlet and outlet lines to accommodate common SAE fittings, while a 3/4-16 UNF port is provided for the case drain to return leakage oil at low pressure. Working ports can withstand up to 470 bar, and case drain pressure must stay below 10 bar to protect the seal system. Approved operating fluids are HLP or HLVP grades specified in DIN 51524, ensuring adequate lubrication and film strength. System cleanliness should reach ISO 4406 class 20/18/15 to minimize abrasive wear on the radial piston set. Fluid temperature may rise to 85 °C during continuous duty and can fall to −20 °C at startup, so materials and clearances accommodate thermal expansion and contraction without leakage.
Technical Specifications
Case Drain Port Size
3/4-16 UNF
Displacement
380 cm3/rev
Drive Shaft Diameter
50 mm
Drive Shaft Type
Parallel Keyed
Fluid Cleanliness
ISO 4406 Class 20/18/15
Hydraulic Fluid
HLP/HLVP (DIN 51524)
Inlet/outlet Port Size
1 1/16-12 UNF
Maximum Case Drain Pressure
10 bar
Maximum Differential Pressure
450 bar
Maximum Fluid Temperature
85 °C
Maximum Port Pressure (a/b)
470 bar
Maximum Speed (1l)
475 rpm
Maximum Torque
2722 Nm
Minimum Fluid Temperature
-20 °C
Specific Torque
6 Nm/bar
Weight
39 kg
1620 Old Apex Road
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