REXROTH A4VG - Tightening Torque Specifications

RE 92004-01-S031/08.2015 | A4VG Series 40 Bosch Rexroth AG 37/40
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10.3 Tightening torques
The following tightening torques apply:
• Fittings:
Observe the manufacturer's instructions regarding the tightening torques of the
fittings used.
• Internal threads of the axial piston unit:
The maximum permissible tightening torques M
Gmax
are the maximum values of
the internal threads and must not be exceeded. Please refer to Table 5 for the
values.
• Threaded plugs:
For the locking screws supplied with the axial piston unit, the required tightening
torques of threaded plugs M
V
apply. Please refer to Table 5 for the values.
• Fixing screws:
For fixing screws according to DIN 13/ISO 68, we recommend checking the
tightening torque in individual cases as per VDI 2230. Please refer to Table 6
for the values.
• SEAL-LOCK sealing nuts:
The tightening torques necessary for SEAL-LOCK sealing nuts M
A
apply.
Please refer to Table 7 for the values.
Table 5: Tightening torques of the female threads and threaded plugs
Ports
Maximum permissible
tightening torque of the
female threads M
G max
Required tightening torque
of the threaded plugs M
V
WAF hexagon socket for
the threaded plugs
Standard Thread size
DIN 3852
1)
M10 x 1
30 Nm 15 Nm
2)
5 mm
M12 x 1.5
50 Nm 25 Nm
2)
6 mm
M14 x 1.5
80 Nm 35 Nm 6 mm
M16 x 1.5
100 Nm 50 Nm 8 mm
M18 x 1.5
140 Nm 60 Nm 8 mm
M22 x 1.5
210 Nm 80 Nm 10 mm
M27 x 2
330 Nm 135 Nm 12 mm
M33 x 2
540 Nm 225 Nm 17 mm
M42 x 2
720 Nm 360 Nm 22 mm
M48 x 2
900 Nm 400 Nm 24 mm
ISO 11926 5/16-24 UNF-2B 10 Nm 7 Nm 1/8 in
3/8-24 UNF-2B 20 Nm 10 Nm 5/32 in
7/16-20 UNF-2B 40 Nm 18 Nm 3/16 in
9/16-18 UNF-2B 80 Nm 35 Nm 1/4 in
3/4-16 UNF-2B 160 Nm 70 Nm 5/16 in
7/8-14 UNF-2B 240 Nm 110 Nm 3/8 in
1 1/16-12 UN-2B 360 Nm 170 Nm 9/16 in
1 5/16-12 UN-2B 540 Nm 270 Nm 5/8 in
1 5/8-12 UN-2B 960 Nm 320 Nm 3/4 in
1 7/8-12 UN-2B 1200 Nm 390 Nm 3/4 in
1)
The tightening torques of the MV threaded plugs apply for screws in the “dry” and received on delivery
and in the “lightly oiled” state for installation.
2)
In the “lightly oiled state”, MA is reduced to 10 Nm for M10x1 and to 17 Nm for M12x1.5