SIEMENS
FLENDER Standard Couplings
Torsionally Rigid All-Steel Couplings — ARPEX ARC-8/-10 Series
6/29
Siemens MD 10.1 · 2015
General information
6
■
Technical data
Power ratings
The permitted shaft misalignments
Δ
K
a
,
Δ
K
r
and
Δ
K
w
are maxi-
mum values and must not occur at the same time
(see following
table).
The specified, permitted shaft misalignment
Δ
K
r
for types
NEN/NHN and MFEFM/MFHFM applies to a shaft distance of
S = 1000 mm (ARC-8) or S = 1500 mm (ARC-10).
The permitted shaft misalignment
Δ
K
r
for types NEN and NHN is
calculated as follows:
Δ
K
r
= (S – S1)
⋅
tan(
Δ
K
w
).
The permitted shaft misalignment
Δ
K
r
for types MFEFM and
MFHFM is calculated as follows:
Δ
K
r
= (S – S1 – 2
⋅
BF)
⋅
tan(
Δ
K
w
).
The values for torsional stiffness apply to the complete coupling.
In the case of types NHN and MFHFM to a coupling with shaft
distance S = 1000 mm (ARC-8) or S = 1500 mm (ARC-10). The
torsional stiffness of the plate packs applies to the rated cou-
pling torque
T
KN
. To determine the torsional stiffness for a spe-
cific operating point, e.g. for calculating torsional vibration, the
manufacturer must be consulted.
T
Kmax
permitted only five times per hour.
Permitted shaft misalignments
Size
Rated
torque
Maxi-
mum
torque
Over-
load
torque
Fatigue
torque
Maxi-
mum
speed
Maximum permitted shaft misalignment
Torsional stiffness
±
Δ
K
a
±
Δ
K
w
±
Δ
K
r
C
T
T
KN
T
Kmax
T
KOL
T
KW
n
Kmax
NEN
NHN
BUB
MFEFM
MFHFM
NEN
for
NHN
BUB
MFEFM
for
MFHFM
S =
1000 mm
S =
1000 mm
S
min.
S =
1000 mm
S
min.
S =
1000 mm
kNm
kNm
kNm
kNm
rpm
mm
mm
mm
mm
MNm/rad
MNm/rad
MNm/rad
MNm/rad
MNm/rad
225-8
8.5
17
25.5
4.25
8500
1.94
0.4°
6.87
0.96
6.53
3.1
0.9368
3.0
3.1
0.9748
255-8
12.7
25.4
38.1
6.35
7500
2.32
6.86
1.10
6.51
3.8
1.2778
3.7
3.8
1.3295
270-8
16.5
33
49.5
8.25
7000
2.40
6.88
1.10
6.52
5.4
1.7339
5.1
5.4
1.8072
295-8
23
46
69
11.5
6500
2.62
6.86
1.17
6.44
7.1
2.6134
6.7
7.1
2.7358
325-8
33
66
99
16.5
6000
2.60
6.84
1.38
6.34
9.6
3.9537
9.4
9.6
4.1715
355-8
45
90
135
22.5
5500
2.88
6.83
1.42
6.28
12.8
5.6093
12.5
12.8
5.9339
385-8
56
112
168
28
5000
3.12
6.81
1.63
6.22
17.8
7.8517
17.0
17.8
8.3555
420-8
70
140
210
35
4500
3.46
6.79
1.78
6.14
22.9
10.8175
21.9
22.9
11.5763
455-8
88
176
264
44
4200
4.02
6.78
1.89
6.11
30.0
14.2794
28.2
30.0
15.2998
505-8
120
240
360
60
3800
4.28
6.77
2.41
6.04
40.2
20.9046
36.4
40.2
22.4421
545-8
165
330
495
82.5
3500
4.48
6.75
2.67
5.98
50.4
28.7428
45.0
50.4
30.7848
595-8
210
420
630
105
3200
4.86
6.73
2.88
5.89
67.8
39.5343
59.5
67.8
42.5997
630-8
260
520
780
130
3000
4.98
0.3°
4.93
2.10
4.14
61.8
42.6162
61.2
61.8
46.3697
700-8
340
680
1020
170
2700
5.78
4.91
2.38
4.06
84.9
60.2135
83.1
84.9
65.8083
S =
1500 mm
S =
1500 mm
S =
1500 mm
S =
1500 mm
630-10
340
680
1020
170
3000
3.04
0.2°
5.03
1.40
4.50
94.6
46.9832
94.4
94.6
50.5520
700-10
430
860
1290
215
2700
3.60
5.02
1.58
4.45
135
72.3106
132
135
77.9729
760-10
550
1100
1650
275
2500
3.70
4.98
1.60
4.30
173
91.7589
180
173
101.228
860-10
770
1540
2310
385
2200
4.82
4.95
1.86
4.21
244
145.230
245
244
160.422
950-10
1050
2100
3150
525
2000
5.40
4.91
1.92
4.09
325
204.443
338
325
227.957
1035-10
1450
2900
4350
725
1850
5.78
4.88
1.95
3.97
426
292.140
455
426
326.930
Size
Permitted angular misalignment
±
Δ
K
w
0.0°
0.1°
0.2°
0.3°
0.4°
Permitted axial misalignment
±
Δ
K
a
in mm
225-8
1.94
1.46
0.97
0.48
0.00
255-8
2.32
1.74
1.16
0.58
0.00
270-8
2.40
1.80
1.20
0.60
0.00
295-8
2.62
1.96
1.31
0.66
0.00
325-8
2.60
1.95
1.30
0.65
0.00
355-8
2.88
2.16
1.44
0.72
0.00
385-8
3.12
2.34
1.56
0.78
0.00
420-8
3.46
2.59
1.73
0.86
0.00
455-8
4.02
3.01
2.01
1.00
0.00
505-8
4.28
3.21
2.14
1.07
0.00
545-8
4.48
3.36
2.24
1.12
0.00
595-8
4.86
3.65
2.43
1.22
0.00
630-8
4.98
3.32
1.66
0.00
700-8
5.78
3.85
1.93
0.00
630-10
3.04
1.52
0.00
700-10
3.60
1.80
0.00
760-10
3.70
1.85
0.00
860-10
4.82
2.41
0.00
950-10
5.40
2.70
0.00
1035-10
5.78
2.89
0.00
© Siemens AG 2015