Bosch Rexroth A7VO 63 Series - Page 8

Bosch Rexroth AG, RE 92202/02.2015
8 A7VO Series 63 | Axial piston variable pump
Technical data
Permissible radial and axial forces of the drive shaft
Size NG 28 55 80 107 160
Drive shaft Ø mm 25 30 35 40 45
Maximum radial force
1)
at distance a (from shaft
collar)
a
F
q
F
q max
N 6436 7581 10266
13758
18278
a mm 14.0 17.5 20.0 22.5 25.0
Maximum torque at F
q max
T
q max
Nm 179 281 444 681 1019
Maximum differential pressure at V
g max
and
F
qmax
Δp
q max
bar 400 322 349 400 400
Maximum axial force at
standstill or pressure-
free operation
–
+
F
ax
+F
axmax
N 0 0 0 0 0
−F
axmax
N 315 500 710 900 11250
Permissible axial force per bar operating pressure
+F
axperm
/bar
N/bar 4.6 7.5 9.6 11.3 15.1
Effect of radialforce F
q
on the service life of bearings
By selecting a suitable direction of radial force F
q
, the load
on the bearings, caused by the internal rotary group forces
can be reduced, thus optimizing the service life of the
bearings. Recommended position of mating gear is depen-
dent on direction of rotation. Example:
Note
▶ The permissible axial force in direction −F
ax
is to be
avoided, because thereby the bearing life is reduced.
▶ Special requirements apply in the case of belt drives.
Please contact us.
▼ Gear drive
φ
o
p
t
=
4
5
°
φ
o
p
t
=
4
5
°
21
1 “Clockwise” rotation, pressure at port B
2 “Counter-clockwise” rotation, pressure at port A
1) With intermittent operation