Bosch Rexroth | SRMCR3D400L40Z32B2M1L12
SRMCR3D400L40Z32B2M1L12
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The SRMCR3D400L40Z32B2M1L12 motor is manufactured by Bosch Rexroth within the MCR Radial Piston Motors series and converts hydraulic energy into rotary motion for mobile and industrial automation tasks. Its displacement is 400 cm³ per revolution, so each shaft turn displaces that volume of fluid and establishes speed at a given flow rate. A specific torque of 6 Nm per bar shows how output torque rises proportionally with system pressure. Continuous operation is allowed up to a differential pressure of 400 bar, while the service ports can withstand 420 bar to handle short pressure peaks. The motor delivers up to 1500 Nm of torque for high load applications, and a speed limit of 270 rpm prevents excessive centrifugal forces on the pistons. A shaft diameter of 40 mm fits standard couplings, and the 21 kg mass simplifies handling during installation.
The integrated parking brake supplies 2200 Nm of holding torque to lock the shaft when the circuit is idle. Brake control oil passes through a 9/16-18 SAE port, and releasing the brake needs 23 cm³ of oil while pressure must stay below 40 bar to protect components. Main flow enters and exits via 7/8-14 UNF a and b ports that follow SAE J514, and leakage returns through a 9/16-18 UNF case-drain port to limit housing pressure. The case-drain path must remain under 10 bar to safeguard internal parts, and NBR seals provide compatibility with common hydraulic oils and moderate temperatures.
Technical Specifications
A/b Port Thread
7/8-14 UNF (SAE J514)
Brake Holding Torque
2200 Nm
Brake Port Thread
9/16-18 SAE (SAE J515)
Brake Release Oil Volume
23 cm3
Case Drain Port Thread
9/16-18 UNF (SAE J514)
Displacement
400 cm3/rev
Max Brake Port Pressure
40 bar
Max Case Drain Pressure
10 bar
Max Differential Pressure
400 bar
Max Port Pressure (a/b)
420 bar
Max Speed (1l)
270 rpm
Max Torque
1500 Nm
Seal Material
NBR
Shaft Diameter
40 mm
Specific Torque
6 Nm/bar
Weight (1l)
21 kg
1620 Old Apex Road
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