23
TRANSMISSION CAPACITY / DIMENSIONS
NEF CLAMP
NEF Clamp Method: Spacer Type Couplings
The NEF Clamp Method enables friction coupling to a shaft, with one bolt tightened in each hub.
Compared to the Power-Lock Method (see p. 26) that also employs friction coupling, these couplings can reduce axial dimension, saving installation space.
The Spacer Type can absorb all types of misalignment, while the Single Type coupling can handle all misalignments except parallel misalignment.
Spacer Type
Unit:
mm
Model No.
Allowable Torque
N
･
m{k
g
f
･
m}
Max. Rotation
Speed
r/min
Standard Stock Bore Diameter
Max. Bore
Dia.
Torsional Stiffness
N
･
m/rad {k
g
f
･
m/rad}
Axial Spring Constant
N/mm {k
g
f/mm}
A
B
NEF02W
19.6{ 2}
20000
!0
,
!2
,
!5
,
!8
,
19
,
20
,
22
,
24
,
25
25
1.00
×
10
4
{0.10
×
10
4
}
34.3 { 3.5}
63.0
20
NEF04W
39.2{ 4}
20000
!2
,
!4
,
!5
,
!6
,
!7
,
19
,
20
,
22
,
24
,
25
26
1.18
×
10
4
{0.12
×
10
4
}
20.6 { 2.1}
86.8
25.4
NEF10W
98 {10}
20000
!5
,
!8
,
@0
,
@2
,
¤4
,
¤5
,
¤8
,
‹0
,
‹5
35
3.92
×
10
4
{0.4
×
10
4
}
29.4 { 3 }
89.8
25.4
NEF18W
176 {18}
18000
!9
,
@2
,
@5
,
¤88
,
‹0
,
‹2
,
‹5
35
7.84
×
10
4
{0.8
×
10
4
}
63.7 { 6.5}
104.4
28.7
NEF25W
245 {25}
15000
@5
,
#0
,
‹2
,
‹5
,
‹8
,
›0
,
›2
42
12.7
×
10
4
{1.3
×
10
4
}
78.4 { 8 }
120
33.5
NEF45W
441 {45}
13000
#0
,
#8
,
$0
,
$2
,
45
,
50
,
55
55
21.6
×
10
4
{2.2
×
10
4
}
109
{11.1}
144.2
41.1
Notes 1. The maximum rotation speed depends on the transmission capacity of the coupling.
No balance adjustment has been conducted.
2. The circled standard stock bore diameters are for the standard hubs, the diameters in squares are for the square hub, and unmarked diameters are for the extended-diameter hubs.
3. The weight, moment of inertia and GD
2
are the values at maximum bore diameter for the round hub. Values in parentheses for the NEF02/04/45 apply to the extended-diameter hub. Values in
parentheses for the NEF10/18/25 apply to the square hub.
4. The allowable axial displacement is based on the assumption that the angular misalignment is
“
0
”
.
5. To prevent the clamp bolt from loosening, the square hub type uses a U-nut, while other types use a NYLOCK bolt.
Model No.
E
H
H
L
J
K
U
T
Weight
k
g
Moment of Inertia
k
g
・
cm
2
GD
2
{k
g
f
・
cm
2
}
Allowable Misalignment
NEF02W
4.9
32
45
23
57
−
11
0.45
(
0.46
)
1.68
(
1.90
)
6.72
(
7.61
)
0.3
±
1.6
NEF04W
6.1
34
50
36
67.5
−
15.5
1.28
(
1.29
)
5.2
(
5.7
)
20.9
(
22.7
)
0.5
±
1.6
NEF10W
6.6
46
−
39
81
66
16
1.52
(
1.35
)
11.7
(
11.0
)
46.7
(
44.0
)
0.55
±
2.0
NEF18W
8.3
51
−
47
93
68
23
2.45
(
2.24
)
24.8
(
23.6
)
99.1
(
94.3
)
0.6
±
2.4
NEF25W
11.2
61
−
53
104
78.3
19
3.3
(
3.0
)
40.8
(
38.5
)
163
(
154
)
0.7
±
2.8
NEF45W
11.7
71
92
62
126
−
23
6.9
(
7.0
)
95.8
(
104
)
383
(
416
)
0.8
±
3.2
Parallel
Misalignment
Axial
Displacement
H
S
Angular
Misalignment
de
g
−
2
−
2
47
2
49
2
60
2
−
2
Spacer Type
NEF02W standard hub
NEF02W extended-diameter hub
NEF04/45W extended-diameter hub
NEF04/10/18/25/45W standard hub
NEF10/18/25W square hub
Summary of Contents for ECHT-FLEX NEF130W
Page 1: ...EMER FLEX COUPLING...
Page 9: ...8 EMER FLEX Example of Mounting Example of Mounting...
Page 36: ...35 35 NEW PRODUCTS...
