BoschRexrothAG, RE 92050-01-X-B2/2019-08-23
8 A4VSO Series 10, 11 and 30 | Axial piston variable pump
Technical data
Technical data
Size NG 40 71 125 180 250 250 H
1)
355 355 H
1)
500 500 H
1)
Displacement
geometric, per revolution
V
g max
cm
3
40 71 125 180 250 250 355 355 500 500
Rotational
speed
maximum
2)
at V
g max
n
nom
rpm 2600 2200 1800 1800 1500 1800 1500 1700 1320 1500
Flow
atn
nom
and V
gmax
q
v max
l/min 104 156 225 324 375 450 533 604 660 750
at n
E
= 1500rpm q
vE max
l/min 60 107 186 270 375 375 533 533 – 750
Power
with n
nom
, V
g max
and Δp = 350 bar
P
kW 61 91 131 189 219 262 311 352 385 437
at
n
E
= 1500rpm,
V
g max
and Δp = 350bar
P
E max
kW 35 62 109 158 219 219 311 311 – 437
Torque
at V
g max
and Δp = 350 bar
T
max
Nm 223 395 696 1002 1391 1391 1976 1976 2783 2783
at V
g max
and Δp = 100 bar
T
Nm 64 113 199 286 398 398 564 564 795 795
Rot
ary
stiffness
Drive shaft
P
c
kNm/rad 80
146 260 328 527 527 800 800 1145 1145
Z
c
kNm/rad 77 146 263 332 543 543 770 770 1136 1136
Moment ofinertia oftherotary group
J
TW
kgm
2
0.0049 0.0121 0.03 0.055 0.0959 0.0959 0.19 0.19 0.3325 0.3325
Maximum angular acceleration
3)
α
rad/s² 17000 11000 8000 6800 4800 4800 3600 3600 2800 2800
Case volume
V
L 2 2.5 5 4 10 10 8 8 14 14
Weight without through drive
(approx.)
m
kg 39 53 88 102 184 184 207 207 320 320
Determining theoperating characteristics
Flow
q
v
=
V
g
• n • η
v
[l/min]
1000
Torque
T
=
V
g
• Δp
[Nm]
20 • π • η
mh
Power
P
=
2 π • T • n
=
q
v
• Δp
[kW]
60000
600 • η
t
Key
V
g
= Displacement per revolution [cm
3
]
Δp
= Differential pressure [bar]
n
= Rotational speed [rpm]
η
v
= Volumetric efficiency
η
mh
= Mechanical-hydraulic efficiency
η
t
=
Total efficiency (η
t
= η
v
• η
mh
)
Notice
▶ Theoretical values, without efficiency and tolerances;
values rounded
▶ Exceeding the maximum or falling below the minimum
permissible values can lead to a loss of function,
areduction in operational service life or total
destruction of the axial piston unit and loss of
explosion protection. We recommend testing the loads
by means of experiment or calculation / simulation and
comparison with the permissible values.
1) High-speed version
2) The values are applicable:
– at an abs. pressure p
abs
= 1bar at the suction port S
‒ for the optimum viscosity range from ν
opt
= 36 to16mm
2
/s
‒ with hydraulic fluid onthe basis ofmineral oils
3) The data are valid for values between the minimum required and
maximum permissible rotational speed. Itapplies for external
stimuli (e.g. diesel engine 2to8times rotary frequency, cardan
shaft twice the rotary frequency). The limit value isonly valid for
asingle pump. The load capacity oftheconnection parts must
beconsidered.