Technical Data (For operation outside of these parameters, please consult Bosch Rexroth)
Description Radial-piston type, low-speed, high-torque motor
Frame size MCR 5...
Type of mounting Flange mounting; face mounting
Pipe connections 1 ) 2 ) Threaded per SAE J514
Shaft loading see page 9
Displacement V g cm 3 /rev 380 470 520 565 620 680 750 820
Output torque
Specific torque (at Dp = 250 bar) T Nm/bar 5.62 6.96 7.70 8.36 9.18 10.06 11.10 12.14
Maximum torque 3 ) 4 ) T Nm 2530 3130 3460 3760 3670 4030 4440 4860
Output speed
Min. speed for smooth running n min rpm 5 (standard) <1 (by special order)
Max. speed (1L) 5 ) 6 ) 7 ) n max rpm 475 385 350 320 290 265 240 220
Max. speed (2WL) 5 ) 6 ) n max rpm 570 465 420 385 350 320 290 265
Weight m kg see unit dimensions pages 10-16
Moment of inertia J m kgm 2 see unit dimensions pages 10-16
Hydraulic
Pressure 8 )
Nominal pressure 9 ) p nom bar 250 250 250 250 250 250 250 250
Max. differential pressure 3 ) Dp max bar 450 450 450 450 400 400 400 400
Max. pressure at port „A“ or „B“ 3 ) p max bar 470 470 470 470 420 420 420 420
Max. case drain pressure p case max bar 10 10 10 10 10 10 10 10
Hydraulic fluid 10 ) Mineral oils (HL, HLP) to DIN 51 524
Hydraulic fluid temperature range t min/max °C –20 to +85 11 )
Viscosity range n min/max mm 2 /s 10 to 2000
Fluid cleanliness ISO 4406, Class 20/18/15
Brake
Holding brake (disc brake) B2 B4
Min. holding torque T min Nm 2200 4400
Release pressure (min/max) p rel bar 15/30 15/30
Oil volume to operate brake V rel cm 3 23 46
Dynamic brake (drum brake) see table page 16
1 ) Ensure motor case is filled with oil prior to start-up.
2 ) For installation and maintenance details, please see Service Manual.
3 ) Maximum values should only be applied for a small portion of the duty cycle.
Please consult Rexroth Engineering Department in Glenrothes for motor life calculations based on particular operating cases.
4 ) For motors with housing type D, maximum torque is 3000 Nm, which restricts maximum pressure accordingly.
5 ) Based on nominal no-load Dp of 20 bar in full-displacement mode.
6 ) Warning! During the running in period of the motor (min. 20 hrs) it should not be run unloaded at >100 rpm.
7 ) Single-speed (1L) motors are available by special order with a 20% increase in the stated maximum speed.
8 ) When operating motors in series, please consult Rexroth Engineering Department in Glenrothes.
9 ) Nominal values are guide values for continuous operation.
10 ) For use with environmentally acceptable fluids HEES, HEPG, HETG, Viton seals must be specified.
For further information, please see RE 90 221.
11 ) Extension of the allowable temperature range may be possible, depending on specification.
Please consult Rexroth Engineering Department in Glenrothes for further details.
