Bosch Rexroth A6VM series 71 User Manual

Bosch Rexroth Corp., RE-A 91610/12.2015
8 A6VM series 71 | Axial piston variable motor
Technical data
Technical data
Size NG 60 85 115 160 170 215
Displacement geometric,
per revolution
V
g max
in
3
3.78 5.20 7.05 9.28 10.48 13.21
cm
3
62.0 85.2 115.6 152.1 171.8 216.5
V
g min
in
3
0 0 0 0 0 0
cm
3
0 0 0 0 0 0
V
g x
in
3
2.26 3.11 4.21 5.55 3.97 5.00
cm
3
37 51 69 91 65 82
Maximum speed
1)
(complying with the maximum
permissible inlet flow)
at V
g max
n
nom
rpm 4450 3900 3550 3250 3100 2900
at V
g
< V
g x
(see diagram) n
max
rpm 7200 6800 6150 5600 4900 4800
at V
g 0
n
max
rpm 8400 8350 7350 6000 5750 5500
Inlet flow
2)
at n
nom
and V
g max
q
v max
gpm 73 88 108 131 141 166
l/min 276 332 410 494 533 628
Torque
3)
at V
g max
and
Δp = 6500psi (450bar)
T
lb-ft 326 448 608 800 903 1139
Nm 444 610 828 1089 1230 1550
Rotary stiffness
V
g max
to V
g
/2 c
min
lb-ft/rad 10695 16521 27511 32084 38279 51334
kNm/rad 14500 22400 37300 43500 51900 69600
V
g
/2 to 0
(interpolated)
c
min
lb-ft/rad 33412 49785 76559 91458 115355 144267
kNm/rad 45300 67500 103800 124000 156400 195600
Moment of inertia for rotary group
J
TW
lb-ft
2
0.1020 0.1709 0.2610 0.4295 0.5055 0.7190
kgm
2
0.0043 0.0072 0.0110 0.0181 0.0213 0.0303
Maximum angular acceleration
α
rad/s² 21000 17500 15500 11000 11000 10000
Case volume
V
gal 0.21 0.26 0.40 0.45 0.61 0.74
l 0.8 1.0 1.5 1.7 2.3 2.8
Weight, approx.
m
lbs 62 79 101 134 137 172
kg 28 36 46 61 62 78
▼ Permissible displacement in relation to speed
NG170
NG85,
115, 150
1.58 1.62
NG60,
215
4)
1.0
0.8
0.63
0.4
0.38
0.2
0
V
g x
V
g x
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.74
Displacement V
g
/ V
g max
Rotational speed n / n
nom
Notes
▶ Theoretical values, without efficiency levels and toler-
ances; values rounded
▶ Operation above the maximum values or below the mini-
mum values may result in a loss of function, a reduced
service life or in the destruction of the axial piston unit.
Other permissible limit values, such as speed variation,
reduced angular acceleration as a function of the fre-
quency and the permissible angular acceleration at start
(lower than the maximum angular acceleration) can be
found in data sheet 90261.
Determining the operating characteristics
Inlet flow
q
v
=
V
g
× n
[gpm]
(
V
g
× n
)
[l/min]
231 × η
v
1000 × η
v
Rotational
speed
n
=
q
v
× 231 × η
v
[rpm]
(
q
v
× 1000 × η
v
)
[rpm]
V
g
V
g
Torque
T
=
V
g
× Δp × η
mh
[lb-ft]
(
V
g
× Δp × η
mh
)
[Nm]
24 × π 20 × π
Power
P
=
2 π × T × n
=
q
v
× Δp × η
t
[HP]
(
2 π × T × n
=
q
v
× Δp × η
t
)
[kW]
33000
1714 60000 600
Key
V
g
= Displacement per revolution [in
3
(cm
3)
]
Δp
= Differential pressure [psi (bar)]
n
= Rotational speed [rpm]
η
v
= Volumetric efficiency
η
mh
= Mechanical-hydraulic efficiency
η
t
=
Total efficiency (η
t
= η
v
• η
mh
)
1) The values are valid:
– For the optimum viscosity range from ν
opt
= 170to75SUS
(36to 16mm
2
/s)
– with hydraulic fluid on the basis of mineral oil
2) Note inlet flow limitation due to counterbalance valve (see page65).
3) Torque without radial force, With radial force see page 9.
4) Values in this range on request

Bosch Rexroth A6VM series 71 Specifications

General

Brand	Bosch
Model	Rexroth A6VM series 71
Category	Engine
Language	English