SIEMENS
FLENDER Standard Couplings
Flexible Couplings — N-BIPEX Series
General
9/4
Siemens MD 10.1 · 2015
9
■
Technical specifications
Cam rings
Cam rings of polyurethane 92 ShoreA (standard)
Cam rings of polyurethane 95 ShoreA (ordering option
-Z
and order code
K01
)
Cam rings of polyurethane 64 ShoreD (ordering option
-Z
and order code
K04
)
Torsional stiffness and damping
The values stated in the above table apply to a capacity utiliza-
tion of 50 %, an excitation amplitude of 10 %
T
KN
with frequency
10 Hz and an ambient temperature of 20 °C. The dynamic tor-
sional stiffness (
C
Tdyn
) is load-dependent and increases in pro-
portion to capacity utilization. The following table shows the cor-
rection factors for different nominal load.
C
Tdyn
=
C
Tdyn 50 %
⋅
FKC
Furthermore, torsional stiffness and damping depend on the am-
bient temperature, the frequency and the amplitude of the tor-
sional vibration excitation. More precise torsional stiffness and
damping parameters on request.
With flexible couplings the manufacturing process of the rubber
elements and their aging primarily influence the stiffness value
C
Tdyn
. For this reason calculation must be made with a tolerance
for the dynamic stiffness of
±
20 %. The specified damping coef-
ficient
Ψ
is a minimum value with the result that the damping per-
formance of the coupling corresponds at least to the specified
value.
Size
Rated torque
Maximum
torque
Fatigue torque
Maximum
speed
Damping coef-
ficient
Ψ
Torsional stiffness
at 50 % capacity
utilization
Permitted shaft misalignment at
1)
V
≤
45 m/s
<
10 Hz
n = 1500 rpm
T
KN
T
Kmax
T
KW
n
max
C
Tdyn 50 %
Δ
K
a
Δ
K
r
Δ
K
w
Nm
Nm
Nm
rpm
Nm/rad
mm
mm
degrees
19
12
36
2
19500
1.4
530
0.30
0.17
0.5
24
45
135
7
14500
1.4
1790
0.40
0.23
0.5
28
95
285
14
12500
1.4
3060
0.50
0.25
0.5
38
190
570
29
10000
1.4
6500
0.60
0.29
0.5
42
265
795
40
8500
1.4
8200
0.70
0.34
0.5
48
330
990
50
7500
1.4
10000
0.80
0.38
0.5
55
460
1380
70
6500
1.4
14500
0.90
0.40
0.5
65
670
2010
100
6000
1.4
25600
1.00
0.45
0.5
75
1400
4200
210
5000
1.4
37400
1.20
0.52
0.5
90
2500
7500
375
4000
1.4
62700
1.40
0.60
0.5
Size
Rated torque
Maximum
torque
Fatigue torque
Maximum
speed
Damping coef-
ficient
Ψ
Torsional stiffness
at 50 % capacity
utilization
Permitted shaft misalignment at
1)
V
≤
45 m/s
<
10 Hz
n = 1500 rpm
T
KN
T
Kmax
T
KW
n
max
C
Tdyn 50 %
Δ
K
a
Δ
K
r
Δ
K
w
Nm
Nm
Nm
rpm
Nm/rad
mm
mm
degrees
19
18
54
3
19500
1.4
1130
0.27
0.15
0.4
24
65
195
10
14500
1.4
4240
0.36
0.21
0.4
28
160
480
25
12500
1.4
8050
0.45
0.23
0.4
38
325
975
50
10000
1.4
14100
0.54
0.26
0.4
42
450
1350
70
8500
1.4
16200
0.63
0.31
0.4
48
550
1650
85
7500
1.4
23300
0.72
0.34
0.4
55
700
2100
105
6500
1.4
28500
0.81
0.36
0.4
65
1000
3000
150
6000
1.4
35000
0.90
0.41
0.4
75
2000
6000
300
5000
1.4
66300
1.08
0.47
0.4
90
3700
11100
555
4000
1.4
105000
1.26
0.54
0.4
Size
Rated torque
Maximum
torque
Fatigue torque
Maximum
speed
Damping coef-
ficient
Ψ
Torsional stiffness
at 50 % capacity
utilization
Permitted shaft misalignment at
1)
V
≤
45 m/s
<
10 Hz
n = 1500 rpm
T
KN
T
Kmax
T
KW
n
max
C
Tdyn 50 %
Δ
K
a
Δ
K
r
Δ
K
w
Nm
Nm
Nm
rpm
Nm/rad
mm
mm
degrees
19
25
75
5
19500
1.4
2010
0.24
0.14
0.3
24
90
270
15
14500
1.4
7680
0.32
0.18
0.3
28
200
600
30
12500
1.4
12200
0.40
0.20
0.3
38
405
1215
60
10000
1.4
25100
0.48
0.23
0.3
42
560
1680
84
8500
1.4
32000
0.56
0.27
0.3
48
700
2100
105
7500
1.4
41200
0.64
0.30
0.3
55
925
2775
140
6500
1.4
52600
0.72
0.32
0.3
65
1200
3600
180
6000
1.4
86700
0.80
0.36
0.3
75
2600
7800
390
5000
1.4
143000
0.96
0.42
0.3
90
4650
13950
700
4000
1.4
234000
1.12
0.48
0.3
Capacity utilization
T
N
/
T
KN
20 %
40 %
50 %
60 %
70 %
80 %
100 %
Correction factor FKC
92/95 ShoreA and
64 ShoreD
0.56
0.85
1.00
1.17
1.35
1.53
1.92
1)
The maximum speed must be observed. Please refer to the Operating
Instructions for further information on permitted shaft misalignment.
© Siemens AG 2015