SIEMENS
FLENDER Standard Couplings
Coupling Preselection and Options
Selection of the coupling series
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Siemens MD 10.1 · 2015
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Selection and ordering data
The coupling series is frequently determined by the driven ma-
chine and the design of the drive train. Common selection crite-
ria are listed below and assigned to coupling properties, which
are used to select the coupling series. Additionally, the price of
the coupling and availability are important criteria for determin-
ing the coupling series to be used.
The FLUDEX series
operates positively and transmits the
torque with the aid of a flowing oil or water filling. FLUDEX cou-
plings are used to reduce starting and/or overload torques. Dur-
ing starting, the motor may, for example, run up within a very
short time; because of the FLUDEX coupling, the drive train with
the driven machine may accelerate after a delay and without in-
creased torque load.
The FLUDEX coupling cannot compensate for shaft misalign-
ment and is therefore designed in combination with a displace-
ment coupling, a cardan shaft or a belt drive. The displacement
coupling may be selected in accordance with the criteria de-
scribed below.
Selection criterion
ZAPEX
ARPEX
N-EUPEX
N-EUPEX
DS
RUPEX
N-BIPEX
ELPEX-B
ELPEX-S
ELPEX
Torque range
Rated coupling torque
T
KN
in Nm
850 ...
7200000
92 ...
1450000
19 ...
62000
19 ...
21200
200 ...
1300000
12 ...
4650
24 ...
14500
330 ...
63000
1600 ...
90000
Speed range
Peripheral speed
v
max
= DA
⋅
n
max
/19100
60
100
36
36
60
45
35
66
60
Torque load
uniform
non uniform
rough
–
–
very rough
–
–
–
–
Installation and alignment
Rigid installation,
well aligned
Rigid installation,
roughly aligned
–
–
–
–
–
Flexible installation
–
–
–
–
–
Torsional stiffness
Torsionally rigid
–
–
–
–
–
–
–
Torsionally flexible
–
–
–
–
Highly flexible
–
–
–
–
–
–
Torque transmission
Free of torsional backlash
–
–
–
–
–
Low torsional backlash
–
–
–
–
–
Overload withstand
capability
–
–
Assembly
Plug-in assembly
–
–
–
with Taper clamping bushes
–
–
–
–
–
Maintenance
Wear parts easily
dismountable
–
Maintenance-free
–
–
–
–
–
–
–
Low-maintenance - interval
1 year
–
Environment
ATEX Approval
–
–
Operating temperature
range
-20 ...
+80 °C
-40 ...
+280 °C
-50 ...
+100 °C
-30 ...
+80 °C
-50 ...
+100 °C
-50 ...
+100 °C
-50 ...
+70 °C
-40 ...
+120 °C
-40 ...
+80 °C
Chemically aggressive
Coupling material
Cast iron
–
–
Steel
–
–
–
Stainless steel
–
–
–
–
–
–
Add-on parts / types
Adapter
–
Brake disk
–
–
Brake drum
–
–
Axial backlash limiter
–
–
–
–
Shiftgear
–
–
–
–
Flange type
–
–
Flange to SAE J620d
–
–
Standard
On request
–
Not possible
© Siemens AG 2015