SIEMENS
FLENDER Standard Couplings
Torsionally Rigid All-Steel Couplings — ARPEX ARW-4/-6 Series
6/47
Siemens MD 10.1 · 2015
General information
6
Variants of the ARPEX coupling, ARW-4/-6 series
Further application-specific coupling types are available in
selection module
X.CAT NG
at
www./couplings
.
Dimension sheets and further information are available on request.
The coupling parts of the ARPEX ARW-4/-6 series with the
exception of H spacers are machined on all sides. These are
delivered with unmachined, primed spacer tube.
■
Technical data
Power ratings, type NHN
The radial misalignment
Δ
K
r
applies to a type NHN coupling with
a shaft distance S = 1000 mm. The radial misalignment
Δ
K
r
for
other shaft distances S is calculated as follows:
Δ
K
r
= (S – S1)
⋅
tan(
Δ
K
w
)
The permitted shaft misalignments
Δ
K
a
,
Δ
K
r
and
Δ
K
w
are maximum
values and must not occur at the same time
(see following table).
The torsional stiffness values apply to the entire coupling with
shaft distance S = 1000 mm. The torsional stiffness of the plate
packs applies to the rated coupling torque
T
KN
. To determine the
torsional stiffness for a specific operating point, e.g. for calculat-
ing torsional vibration, the manufacturer must be consulted.
T
Kmax
permitted only five times per hour.
Permitted shaft misalignments
Because of design specifications, the maximum possible axial
shaft misalignment with plate packs pulled apart (
tension +
) is
greater than with plate packs pressed together (
compression –
).
Types
NHN
Variant with unmachined intermediate spacer, with
variable spacer length
Size
Rated
torque
Maximum
torque
Overload
torque
Fatigue
torque
Maximum
speed
Maximum permitted shaft misalignment
Torsional
stiffness
T
KN
T
Kmax
T
KOL
T
KW
n
Kmax
+
Δ
K
a
–
Δ
K
a
±
Δ
K
w
±
Δ
K
r
C
Tdyn
Tension
Compression
for
S = 1000 mm
for
S = 1000 mm
Nm
Nm
Nm
Nm
rpm
mm
mm
mm
MNm/rad
101-4
92
140
230
37
10400
2.4
2.0
3.0°
51.8
0.006
133-4
225
340
560
90
7850
3.3
2.2
51.7
0.012
167-4
450
680
1130
180
6250
4.2
2.2
51.6
0.028
196-4
800
1200
2000
320
5350
5.1
2.2
51.6
0.068
230-4
1250
1880
3200
500
4550
5.7
2.2
51.6
0.108
260-4
2000
3000
5000
800
4000
6.6
2.2
51.5
0.174
292-4
2700
4100
6800
1080
3550
7.5
2.8
51.4
0.275
324-4
3850
5800
9700
1540
3200
8.4
2.8
51.4
0.451
355-4
5250
7900
13200
2100
2950
9.0
2.8
51.4
0.622
389-4
6650
10000
16700
2660
2700
10.0
2.8
51.4
0.657
439-4
9850
15000
25000
3940
2350
11.1
3.0
51.3
1.08
499-4
13300
20000
34000
5320
2100
12.4
4.8
50.8
1.32
547-4
19000
29000
48000
7600
1900
13.4
4.8
50.7
2.03
600-4
25150
38000
63000
10060
1750
14.6
4.8
50.6
2.73
647-4
32500
49000
82000
13000
1600
16.0
4.8
50.6
3.93
695-6
41000
62000
103000
16400
1500
17.0
4.8
50.7
10.1
756-6
52000
78000
130000
20800
1350
18.0
4.8
50.6
14.0
817-6
65000
98000
163000
26000
1250
20.0
4.8
50.5
16.9
880-6
80000
120000
200000
32000
1150
22.0
4.8
50.5
21.2
Size
Permitted angular misalignment
Δ
K
w
(tension +)
Permitted angular misalignment
Δ
K
w
(compression –)
3.0°
1.5°
0.0°
3.0°
1.5°
0.0°
Permitted axial misalignment
Δ
K
a
in mm
Permitted axial misalignment
Δ
K
a
in mm
101-4
0.8
1.6
2.4
0.8
1.6
2
133-4
1.1
2.2
3.3
1.1
2.2
2.2
167-4
1.4
2.8
4.2
1.4
2.2
2.2
196-4
1.7
3.4
5.1
1.7
2.2
2.2
230-4
1.9
3.8
5.7
1.9
2.2
2.2
260-4
2.2
4.4
6.6
2.2
2.2
2.2
292-4
2.5
5.0
7.5
2.5
2.8
2.8
324-4
2.8
5.6
8.4
2.8
2.8
2.8
355-4
3.0
6.0
9.0
2.8
2.8
2.8
389-4
3.3
6.7
10.0
2.8
2.8
2.8
439-4
3.7
7.4
11.1
3.0
3.0
3.0
499-4
4.1
8.3
12.4
4.1
4.8
4.8
547-4
4.5
8.9
13.4
4.4
4.8
4.8
600-4
4.9
9.7
14.6
4.8
4.8
4.8
647-4
5.3
10.7
16.0
4.8
4.8
4.8
695-6
5.6
11.4
17.0
4.8
4.8
4.8
756-6
6
12.1
18.0
4.8
4.8
4.8
817-6
6.7
13.4
20.0
4.8
4.8
4.8
880-6
7.3
14.8
22.0
4.8
4.8
4.8
© Siemens AG 2015