Bosch Rexroth | SRMCR5D820L50L5032A0M1L01
SRMCR5D820L50L5032A0M1L01
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The SRMCR5D820L50L5032A0M1L01 is a radial piston motor built by Bosch Rexroth as part of the MCR Radial Piston Motors series. It converts hydraulic energy to rotational motion in automated drives for swing, winch, or travel functions. The motor has a displacement of 820 cm³ per revolution, allowing each shaft turn to move a sizable fluid volume for high torque at low speed. A maximum speed of 220 rpm suits slow, controlled movement typical in mobile machinery. Hydraulic connection is provided through an inlet/outlet port threaded 1 1/16-12 UNF under SAE J514, while a separate filler port with a 3/4-16 UNF thread simplifies oil filling and venting. The design uses HLP or HLVP fluids specified in DIN 51524, and operation requires oil cleanliness no worse than ISO 4406 class 20/18/15 to limit wear on the piston set. NBR seals contain the working fluid and tolerate common mineral hydraulic oils.
System limits center on pressure and torque capability. The motor accepts a continuous pressure of 420 bar at ports A and B, and the differential between these ports may reach 400 bar to drive the pistons without structural overstress. With this loading the shaft can deliver up to 3000 Nm of torque, and the specific torque is 13 Nm per bar so control algorithms can predict output from measured pressure. Smooth rotation begins at 0.5 rpm, which benefits positioning tasks that need crawl speeds. Case drainage is routed through a 3/4-16 UNF port, and the return oil line must stay below 10 bar to avoid seal damage. Together these ratings define safe performance boundaries for closed-loop or open-loop hydraulic circuits that rely on this motor.
Technical Specifications
Case Drain Port Size
3/4-16 UNF (SAE J514)
Displacement
820 cm³/rev
Filler Port Size
3/4-16 UNF (SAE J514)
Fluid Cleanliness
ISO 4406 Class 20/18/15
Hydraulic Fluid Type
HLP/HLVP (DIN 51524)
Inlet/outlet Port Size
1 1/16-12 UNF (SAE J514)
Max Case Drain Pressure
10 bar
Max Pressure At Port A/b
420 bar
Maximum Differential Pressure
400 bar
Maximum Speed (1l)
220 rpm
Maximum Torque
3000 Nm
Minimum Speed For Smooth Running
0.5 rpm
Seals
NBR (Nitrile)
Specific Torque
13 Nm/bar
1620 Old Apex Road
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