REXROTH A2FO Series User manual

Industrial
Hydraulics
Electric Drives
and Controls
Linear Motion and
Assembly Technologies Pneumatics
Service
Automation
Mobile
Hydraulics
Features
– Fixed displacement pump A2FO of axial piston, bent axis design
is made suitable for hydrostatic drives in open circuits.
– Suitable for use in mobile or industrial applications.
– Output flow is proportional to drive speed and displacement.
– The drive shaft bearings are designed to give the service life
expected in these areas of operation.
– Careful selection of the displacements offered, permit sizes to
be matched to practically every application.
– Favourable power / weight ratio
– Compact and economical design
– Optimum efficiency
– One piece pistons with piston rings
for open circuits
RE 91 401/09.00
replaces 01.97
Inhalt
Features 1
Ordering Code / Standard Program 2
Technical Data 3...6
Ordering Code - Size 5 7
Unit Dimensions, Size 5 7
Unit Dimensions, Sizes 10, 12, 16 8
Unit Dimensions, Sizes 23, 28, 32 9
Unit Dimensions, Size 45 10
Unit Dimensions, Sizes 56, 63 11
Unit Dimensions, Sizes 80, 90 12
Unit Dimensions, Sizes 107, 125 13
Unit Dimensions, Sizes 160, 180 14
Unit Dimensions, Size 200 15
Unit Dimensions, Size 250 15
Unit Dimensions, Size 355 16
Unit Dimensions, Size 500 16
Unit Dimensions, Size 710 17
Unit Dimensions, Size 1000 17
Preferred Types 18
Installation and Commissioning Guidelines 19
Fixed Displacement Pump A2FO
Sizes 5...1000
Series 6
Nominal pressure up to 400 bar
Peak pressure up to 450 bar

2/20 osch Rexroth AG | Mobile Hydraulics A2FO | RE 91 401/09.00
Ordering Code / Standard Program
(Ordering code size 5 see page 7)
A2F O / 6 –
Sizes 5...200: production Elchingen plant; sizes 250...1000: production Horb plant
= available
–= not available
1) only in connection with drive shaft bearings "L"
2) threads of fixing screws are metric
= preferred program
(preferred types see page 18)
Hydraulic fluid
Mineral oil (no code)
HFB-, HFC-, HFD- sizes 10...200 (no code)
fluids sizes 250...1000 1)E-
Axial piston unit
Bent axis design, fixed displacement A2F
Drive shaft bearings 10...200 250..500 710..1000
Mechanical bearings (no code) –
Long-Life bearings –L
Mode of operation
Pump, open circuit O
Size
Displacement Vg(cm3)
5 10 12 16 23 28 32 45 56 63 80 90 107 125 160 180 200 250 355 500 710 1000
Series
6
Index
sizes 10...180 1
size 200 3
sizes 250...1000 0
Direction of rotation
Viewed on shaft end clockwise R
anti-clockwise L
Seals 10...200 250...1000
NBR (nitril-caoutchouc) –P
NBR (nitril-caoutchouc), shaft seal in FKM (fluor-caoutchouc) –N
FKM (fluor-caoutchouc) V
Shaft end 10 12 16 23 28 32 45 56 63 80 90 107 125 160 180 200 250 355 500 710 1000
Splined shaft ––––– A
DIN 5480 – – – – – –– Z
Parallel shaft with –––––– B
key, DIN 6885 – – – – – –– P
Mounting flange 10 12 16 23 28 32 45 56 63 80 90 107 125 160 180 200 250 355 500 710 1000
ISO 4-hole –––– B
ISO 8-hole ––––––––––––––––– H
Service line connections 2)
A(B) SAE, at side ––– ––––05
S SAE, at rear
A(B) threads at side
––––––––––––––––––06
S threads, at rear
A(B) SAE, at rear ––––––––––––––––– 11
S SAE, at rear

RE 91 401/09.00 | A2FO Mobile Hydraulics | osch Rexroth AG 3/20
t
min
= -40°Ct
max
= +115°C
5
10
40
60
20
100
200
400
600
1000
1600
2500 0°20°40°60°80°100°-40°-20°
ν
opt.
16
36
5
1600
-40°-25°-10°10°30°50°90°115°70°
0°
VG 22
VG 32
VG 46
VG 68
VG 100
Notes on the selection of the hydraulic fluid
In order to select the correct fluid, it is necessary to know the operating
temperature in the tank (open circuit) in relation to the ambient
temperature.
The hydraulic fluid should be selected so that within the operating
temperature range, the operating viscosity lies within the optimum
range (νopt) (see shaded section of the selection diagram). We
recommend that the highest possible viscosity range should be chosen
in each case.
Example: At an ambient temperature of X°C the operating
temperature is 60°C.Within the operating viscosity range (νopt; shaded
area), this corresponds to viscosity ranges VG 46 or VG 68. VG 68
should be selected.
Important: The leakage oil (case drain oil) temperature is influenced
by pressure and pump speed and is always higher than the tank
temperature. However, at no point in the circuit may the temperature
exceed 115°C for sizes 5…200 or 90°C for sizes 250…1000.
If it is not possible to comply with the above conditions because of
extreme operating parameters or high ambient temperatures please
consult us.
Filtration
The finer the filtration the better the achieved cleanliness level of the
pressure fluid and the longer the life of the axial piston unit.
To ensure the functioning of the axial piston unit a minimum
cleanliness level of
9 to NAS 1638
18/15 to ISO/DIS 4406 is necessary.
At very high temperatures of the hydraulic fluid (90°C to max. 115°C,
not permissible for sizes 250…1000!) at least cleanliness level
8 to NAS 1638
17/14 to ISO/DIS 4406 is necessary.
If above mentioned grades cannot be maintained please consult
supplier.
Direction of flow
clockwise rotation anti-clockwise rotation
Sto BSto A
Symbol
Connections
A, B Service line ports
S Suction port
T Drain port
U Port for bearing flushing
(sizes 250...1000)
Fluid
To review the application of A2FO pumps with the selected hydraulic
fluid, detailed fluid compatibility and application data can be found
in data sheets RE 90220 (mineral oil), RE 90221 (environmentally
acceptable hydraulic fluids) and RE 90223 (fire resistant fluids, HF).
The fixed pump A2FO is not suitable for operation with HFA. When
using HFB-, HFC-, HFD- or environmentally acceptable hydraulic fluids
possible limitations for the technical data have to be taken into
consideration. If necessary please consult our technical department
(please indicate type of the hydraulic fluid used for your application
on the order sheet).
Operating viscosity range
In order to optain optimum efficiency and service life, we recommend
that the operating viscosity (at operating temperature) be selected
from within the range:
νopt = operating viscosity 16...36 mm2/s
referred to the tank temperature (open circuit).
Viscosity limits
The limiting values for viscosity are as follows:
Sizes 5...200
νmin =5mm
2/s,
short term at a max. permissible temperature of tmax = 115°C
νmax = 1600 mm2/s,
short term on cold start (tmin = -40°C)
Sizes 250...1000
νmin = 10 mm2/s,
short term at a max. permissible leakage oil temp. of t
max
= 90°
νmax = 1000 mm2/s,
short term on cold start (tmin = -25°C)
Please note that the max. fluid temperature is also not exceeded in
certain areas (for instance bearing area).
At temperatures of -25°C up to -40°C special measures may be
required for certain installation positions. Please contact us for
further information.
Selection diagram
Technical Data
T US
B (A)
temperature t (°C)
fluid temperature range
viscosity ν(mm2/s)

4/20 osch Rexroth AG | Mobile Hydraulics A2FO | RE 91 401/09.00
Case drain pressure
Shaft seal ring FKM (fluor-caoutchouc)
The lower the speed and the case drain pressure the higher the life
expectation of the shaft seal ring. The values shown in the diagram
are permissible loads of the seal ring and shall not be exceeded.
With constant case pressure in the range of the max. permissible
case pressure a reduction of the life expectancy of the seal ring will
result.
For a short period (t < 5 min.) for the sizes 5…200 pressure loads up
to 5 bar independent from rotational speeds are permissible.
Sizes 10...200
Shaft seal ring NBR (nitril-caoutchouc) sizes 5...200
For seal rings of NBR 33% reduced values for the max. permissible
housing pressure pabs.max. are to be considered compared with seals
of FKM.
Special operation conditions may require limitations of these values.
Note:
- maximum permissible pump speeds are given in the table on page 5
- max. perm. casing pressure pabs. max ___ 10 bar (sizes 5...200)
___ 4 bar (sizes 250...1000)
- the pressure in the housing must be the same as or greater than
the external pressure on the shaft seal
Working pressure range inlet
Minimum pressure at port S
pabs. min _______________________________________________________________ 0,8 bar
Working pressure range outlet
Maximum pressure at port A or B
(Pressure data to DIN 24312)
Size 5 Shaft end B Shaft end C
Nominal pressure pN210 bar 315 bar
Peak pressure pmax 250 bar 350 bar
Sizes 10...200 1) Shaft end A, Z 2) Shaft end B, P
Nominal pressure pN400 bar 350 bar
Peak pressure pmax 450 bar 400 bar
1) Attention: shaft end Z and P with drives of radial force loads at
the drive shaft (pinion V-belt drives) necessitate reduction of the
nominal pressure to pN = 315 bar.
2) shaft end Z for size 56: pN= 350 bar, pmax = 400 bar
Sizes 250...1000
Nominal pressure pN350 bar
Peak pressure pmax 400 bar
With pulsating loads above 315 bar we recommend using the model
with splined shaft, standard versionA (sizes 10…200) or with splined
shaft Z (sizes 250…1000).
Long-Life bearings (L) (sizes 250...1000)
(for high life expectancy and use of HF-fluids)
The outer dimensions of the axial piston pumps are identical to
standard design (without long life bearings). The change from
standard design to long life bearing system is possible.We recommend
to apply bearing flushing at port U.
Temperature range of the shaft seal ring
The FKM shaft seal is admissible for a temperature range from
-25°C to +115°C. For applications below -25°C a NBR shaft seal is
necessary (admissible temperature range -40°C to +90°C) (special
design for sizes 250...1000).
Bearing flushing
For sizes 250...1000 bearing and housing flushing is possible through
port U.
Flushing flow (recommendation)
Size 250 355 500 710 1000
qflush (L/min) 10 16 20 25 25
Technical Data
Sizes 250...1000
speed n (rpm)
perm. pressure pabs. max. (bar)
7000 80005000 600040002000 30000 1000
1
2
3
4
5
6
7
8
9
10
sizes 10, 12, 16
sizes 23, 28, 32
size 45
sizes 56, 63
sizes 80, 90
sizes 107, 125
sizes 160, 180
size 200
perm. pressure pabs. max. (bar)
speed n (rpm)
3
2,5
2
1,5
1
0 1000750 2000
3,5
500250 1500 17501250
4
size 250
size 355
sizes 500
size 1000
sizes 710

RE 91 401/09.00 | A2FO Mobile Hydraulics | osch Rexroth AG 5/20
2,0
1,8
1,6
1,4
1,2
1,0
0,8
0
1
2
3
4
speed n/nmax
Note:
- max. perm. speed nmax perm. (speed limit)
- min. perm. pressure at port S
- admissible values for the drive shaft seal
Maximum permissible speed with increased inlet pressure
pabs at suction port S
inlet pressure p
abs
in bar
Table of values (theoretical values, without considering ηmh and ηv; values rounded)
Size 5 10 12 16 23 28 32 45 56 63 80
Displacement Vg cm34,93 10,3 12,0 16,0 22,9 28,1 32 45,6 56,1 63 80,4
Max. speed 1) nmax rpm 5600 3150 3150 3150 2500 2500 2500 2240 2000 2000 1800
Max. perm. speed with increased
nmax perm. rpm 8000 6000 6000 6000 4750 4750 4750 4250 3750 3750 3350
input pressure pabs
Max. perm. output flow, at nmax
2)
qV max L/min 27 32 37 49 56 68 78 99 109 122 140
Max. power ∆p = 350 bar Pmax kW 14,5 3)19222933414760657484
at qv max ∆p = 400 bar
Pmax kW –22 25 34 38 47 53 68 75 84 96
Torque constants TK Nm/bar 0,076 0,164 0,19 0,25 0,36 0,445 0,509 0,725 0,89 1,0 1,27
Perm. torque ∆p = 350 bar T Nm 24,7 3) 57 67 88 126 156 178 254 312 350 445
∆p = 400 bar T Nm –65 76 100 144 178 204 290 356 400 508
Case volume L 0,17 0,17 0,17 0,20 0,20 0,20 0,33 0,45 0,45 0,55
Moment of inertia
J kgm2 0,00008 0,0004 0,0004 0,0004 0,0012 0,0012 0,0012 0,0024 0,0042 0,0042 0,0072
about drive axis
Weight (approx.) m kg 2,5 5,4 5,4 5,4 9,5 9,5 9,5 13,5 18 18 23
Size 90 107 1 25 160 180 200 250 355 500 710 1000
Displacement Vg cm390 106,7 125 160,4 180 200 250 355 500 710 1000
Max. speed 1) nmax rpm 1800 1600 1600 1450 1450 1550 1500 1320 1200 1200 950
Max. perm. speed with increased
nmax perm. rpm 3350 3000 3000 2650 2650 2750 1800 1600 1500 1500 1200
input pressure pabs
Max. perm. output flow, at nmax
2)
qV max L/min 158 167 196 228 255 304 364 455 582 826 922
Max. power ∆p = 350 bar Pmax kW 95 100 117 135 152 181 219 273 350 497 554
at qv max ∆p = 400 bar
Pmax kW 108 114 133 155 174 207 –––––
Torque constants TK Nm/bar 1,43 1,70 1,99 2,55 2,86 3,18 3,99 5,65 7,96 11,3 15,9
Perm. torque ∆p = 350 bar T Nm 501 595 697 889 1001 1114 1393 1978 2785 3955 5570
∆p = 400 bar T Nm 572 680 796 1016 1144 1272 –––––
Case volume L 0,55 0,8 0,8 1,1 1,1 2,5 3,5 7,8
Moment of inertia
J kgm20,0072 0,0116 0,0116 0,0220 0,0220 0,0378 0,061 0,102 0,178 0,55 0,55
about drive axis
Weight (approx.) m kg 23 32 32 45 45 66 73 110 155 322 336
1) The values shown are valid for an absolute pressure (pabs) of 1 bar at the suction inlet S and when operated on mineral oil.
By increase of the input pressure (pabs > 1 bar) the rotational speeds can be increased to the max. admissible speeds (speed limits) (see diagram).
2) 3 % volumetric loss included 3)
∆ p = 315 bar
Calculation of size
Vg•n •ηv
Flow qV= in L/min
1000
Vg•∆p 1,59 •Vg•∆p
Torque T = = in Nm
20 π•ηmh 100 •ηmh
2 π•T •nT•nq
V•∆p
Power P = = = in kW
60 000 9549 600 •ηt
Vg= geometric displacement per rev. in cm3
T = torque in Nm
∆p = pressure differential in bar
n = speed in rpm
ηv= volumetric efficiency
ηmh= mech. -hyd. efficiency
ηt= overall efficiency
sizes 5...200
sizes 250...1000
Technical Data

6/20 osch Rexroth AG | Mobile Hydraulics A2FO | RE 91 401/09.00
Code explanation
a = distance of Fqfrom shaft shoulder
Fq max = max. perm. radial force at distance a
(at intermittent operation)
±Fax max = max. perm. axial force when stationary
or when axial piston unit is running at zero pressure
±Fax perm./bar= perm. axial force/bar working pressure
The direction of the max. perm. axial force must be noted by
sizes 5...200:
- Fax = increases bearing life
+ Fax = reduces bearing life
(avoid if possible)
Output drive
Permissible axial and radial loads on drive shaft
The values given are maximum values and do not apply to continuous operation
Size 5 10 12 16 23 28 32 45 56 63 80
a mm 12 16 16 16 16 16 16 18 18 18 20
Fq max N 710 2350 2750 3700 4300 5400 6100 8150 9200 10300 11500
±Fax max N 180 320 320 320 500 500 500 630 800 800 1000
±Fax perm./bar N/bar 1,5 3,0 3,0 3,0 5,2 5,2 5,2 7,0 8,7 8,7 10,6
Size 90 107 125 160 180 200 250 355 500 710 1000
a mm 20 20 20 25 25 25 41 52,5 52,5 67,5 67,5
Fq max N 12900 13600 15900 18400 20600 22900 12001) 15001) 19001) 30001) 26001)
±Fax max N +Fax max 1000 1250 1250 1600 1600 1600 4000 5000 6250 10000 10000
- Fax max 1000 1250 1250 1600 1600 1600 1200 1500 1900 3000 2600
±Fax perm./bar N/bar 10,6 12,9 12,9 16,7 16,7 16,7 2)2)2)2)2)
1) Axial piston unit in stationary or in bypass operation, please contact us when appearing higher forces!
2) Please contact us!
Technical Data
Optimal force direction of Fq(valid for sizes 10...180)
By means of appropriate force directions of Fqthe bearing load caused
by inside rotary group forces can be reduced. An optimal life
expectation of the bearing can be reached.
F
q
a
-
+
F
ax
A B A B
ϕ
o
p
t
=
4
5
°
ϕ
o
p
t
=
4
5
°
ϕ
o
p
t
=
7
0
°
ϕ
o
p
t
=
7
0
°
clockwise rotation
pressure at port B
clockwise rotation
pressure at port B
anti-clockwise rotation
pressure at port A

RE 91 401/09.00 | A2FO Mobile Hydraulics | osch Rexroth AG 7/20
Unit Dimensions, Size 5
Detail Y
pN= 315 bar
pN= 210 bar
Shaft ends Connections
B, (A) Service line ports M18x1,5
S Suction port M22x1,5
T Drain port M10x1, both sides
A2F 5 6.0 7
Additional instructions in text form
Seals
The fixed pump A2F 5 is equipped with NBR-
(nitril-caoutchouc) seals in standard design.
In case of need FKM- (fluor-caoutchouc) seals
please indicate when ordering in clear text:
"with FKM-seals"
Axial piston unit
Bent axis design, fixed displacement A2F
Size
Displacement Vg(cm3)5
Direction of rotation
Viewed on shaft end clockwise R
anti-clockwise L
Series
6.0
Shaft end
Parallel shaft with key DIN 6885 B
Tapered shaft with spigot and spring washer DIN 6888 C
Service line connections
Threads at side, metric 7
= preferred program
(preferred types see page 18)
taper 1:10
Ordering Code / Standard Program - Size 5
BParallel shaft with
key A4x4x20
DIN 6885
CTapered shaft with spigot
and spring washer 3x5
DIN 6888
51 80
4
74,5
58,5
17,5
8
TT
TS
B (A)
ø60
48,5
62
h8
25°
70
R 6
70
6,4
75
±0,1
Y
Before finalising your design, please request a certified drawing.
Note:
For anti-clockwise rotation port
plate is rotated through 180º

8/20 osch Rexroth AG | Mobile Hydraulics A2FO | RE 91 401/09.00
Unit Dimensions, Sizes 10, 12, 16
Before finalising your design, please request a certified drawing.
64,5
12
20
6
5
108
T2
ø80 h6
5
53,5
T1
41,5
40°
95
45°
45°
R 10
95
9
100
55,5
93,5
147
130,5
23,5
R
48,5
167,5
69
18,2
B (A)
42,5 16
85
S
Note:
For anti-clockwise rotation port
plate is rotated through 180º
pN= 400 bar pN= 400 bar pN= 350 bar pN= 350 bar
Connections
B(A) Service line ports M22x1,5
S Suction port M33x2
T1,T2Drain port (1 port plugged) M12x1,5
R Air bleed (plugged) M8x1
Shaft ends
Sizes 10, 12, 16
ASplined shaft, DIN 5480
W 25x1,25x30x18x9g
Sizes 10, 12
ZSplined shaft, DIN 5480
W 20x1,25x30x14x9g
Sizes 10, 12, 16
BParallel shaft with key,
AS 8x7x32, DIN 6885
Sizes 10, 12
PParallel shaft with key,
AS 6x6x32, DIN 6885

RE 91 401/09.00 | A2FO Mobile Hydraulics | osch Rexroth AG 9/20
Unit Dimensions, Sizes 23, 28, 32
Before finalising your design, please request a certified drawing.
120
70
40,5
13
18,2
60,7
18
25
8
19
141
T2
19
ø100 h6
T1
40°
55,5
118
45°
45°
R 12
118
11
125
48,5
169
144
9
R
61,5
193
91
23,2
60 14
106
19
47,6
22,2
B (A)
S
Note:
For anti-clockwise rotation port
plate is rotated through 180º
pN= 400 bar pN= 400 bar pN= 350 bar pN= 350 bar
Connections
B(A) Service line ports SAE 1/2"
420 bar (6000 psi) high pressure series
S Suction port SAE 3/4"
350 bar (5000 psi) standard series
T1,T2Drain port (1 port plugged) M16x1,5
R Air bleed (plugged) M10x1
Shaft ends
Sizes 23, 28, 32
ASplined shaft, DIN 5480
W 30x2x30x14x9g
Sizes 23, 28
ZSplined shaft, DIN 5480
W 25x1,25x30x18x9g
Sizes 23, 28, 32
BParallel shaft with key,
AS 8x7x40, DIN 6885
Sizes 23, 28
PParallel shaft with key,
AS 8x7x40, DIN 6885
M8; 15 deep
M10; 17 deep

10/20 osch Rexroth AG | Mobile Hydraulics A2FO | RE 91 401/09.00
Unit Dimensions, Size 45
Before finalising your design, please request a certified drawing.
Note:
For anti-clockwise rotation port
plate is rotated through 180º
Connections
B(A) Service line ports SAE 3/4"
420 bar (6000 psi) high pressure series
S Suction port SAE 1"
350 bar (5000 psi) standard series
T1,T2Drain port (1 port plugged) M18x1,5
R Air bleed (plugged) M12x1,5
Shaft ends
50,8
19
23,8
60,3
20
32
12
18
T
2
ø125
h6
T1
40 °
158
18
63
52
150
45°
45°
R 16
150
13,5
160
181
132
155
80
11
R
78
206
102
30
B (A)
63,5 20
118
25
52,4
26,2
S
ASplined shaft, DIN 5480
W 32x2x30x14x9g
ZSplined shaft, DIN 5480
W 30x2x30x14x9g
PParallel shaft with key,
AS 8x7x50, DIN 6885
pN= 400 bar pN= 400 bar pN= 350 bar
M10; 17 deep
M10; 17 deep