Wire rope isolators are comprised of steel cable threaded through metal retaining bars for effective shock and vibration isolation. - High deflection - High isolation level - High damping - Reduction of noise - Excellent resistance to environmental agents - Maintenance free

1. WIRE ROPE SPRINGS
AND ISOLATORS
Eidos Engineering
A new technology
for noise and
vibration control

2. Table of contents
The company ..............................................................................................................................................................2
An advanced methodology.........................................................................................................................................3
Wire rope springs applications ...................................................................................................................................4
Wire rope springs overview........................................................................................................................................5
Description .............................................................................................................................................................5
Main characteristics ...............................................................................................................................................5
Materials and finishes ................................................................................................................................................6
Options .......................................................................................................................................................................6
Mounting ............................................................................................................................................................6
Loops...................................................................................................................................................................6
Performance ...............................................................................................................................................................6
Stiffness ..............................................................................................................................................................6
Damping..............................................................................................................................................................8
Mounting Orientation ................................................................................................................................................8
Technical data EWR-4 .................................................................................................................................................9
Technical data EWR-8 ...............................................................................................................................................10
Technical data EWR-10 .............................................................................................................................................10
Technical data EWR-15 .............................................................................................................................................11
Technical data EWR-20 .............................................................................................................................................13
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3. The company
Eidos Engineering is leader in
dynamics of machinery, mechanical
vibrations and acoustics.
This the reason because Eidos
Engineering offers a range of wire
rope springs and isolators, each
designed to reduce the harmful
effects of shock and vibration.
Furthermore, Eidos Engineering is
one of the leading companies in
design and production of Tuned Mass Dampers (vibration absorbers) for industrial and
structural applications.
Eidos Engineering is a leading
manufacturer of highly engineered
components
and
customized
technical solutions.
Building on its heritage of innovation,
Eidos Engineering partners with its
customers to deliver innovative
solutions to the key industries that
underpin our modern way of life.
Eidos Engineering is ready to answer your questions, feel free to contact us at:
Phone: +39 0434 507547
Fax: +39 0434 507546
Email: info@eidosengineering.com
Online: www.eidosengineering.com
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4. An advanced methodology
The correct approach to a new technical problem is the perfect combination of actions
and time. It’s the winning strategy.
Throughout the knowledge of theory and practice, and following an experienced workflow, Eidos Engineering finds out the right way to satisfy customer’s needs.
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5. Wire rope springs applications
• Pump, generator and compressor isolation
• Shipping cases and containers
• Chemical processing plants
• Chimneys, scrubbers and vessels
• Power plant piping suspension
• Over-the-road transport
• Navigation equipment
• Transportable shelters
• Electronic cabinets
• Seismic isolation
• Tool machines and automation
• Tuned Mass Dampers
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6. Wire rope springs overview
Description
Standard wire rope springs are comprised of steel cable threaded through metal
retaining bars that are mounted for effective shock and vibration isolation. Thanks to
their construction, Eidos Engineering wire rope springs are environmentally stable, highperformance shock and vibration isolators that are unaffected by temperature
extremes, oils and abrasives.
Main characteristics
• High deflection compared with overall dimensions
• Natural frequencies lower than 10Hz with high isolation level
• Reduction of structure-born noise
• High damping
• Magnification at resonance lower than 3
• Excellent resistance to environmental agents
• Maintenance free
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7. Materials and finishes
• Wire rope
o stainless steel
o galvanized
• Mount bars
o aluminum
o alloy steel, galvanized
o stainless steel
• Hardware
o alloy steel, zinc plated
o stainless steel
• Thread
o stainless self-clinching insert
o stainless steel helical inserts
For special solutions consult Eidos Engineering.
Options
Mounting
Eidos Engineering offers a full range of mounting combinations of thru-hole,
countersunk, and threaded bars. All configurations are in Metric styles.
Consult Eidos Engineering for special mounting configuration.
Loops
Eidos Engineering’s wire rope springs can be purchased with the full number of loops, or
as few as 2-Loops.
The number of loops is indicated in the isolator part number. Performance is provided
for full loop isolators.
Performance for reduced loop isolators can be obtained by a simple ratio.
Performance
Stiffness
Wire rope springs exhibit non-linear stiffness behavior. Small deflections, usually
associated with vibration isolation, will have a different spring rate than larger shock
deflections. Eidos Engineering publishes typical vibration stiffness values within the
catalog. These values can be used to predict system performance.
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8. The stiffness values listed in the catalog are for full-loop versions. For reduced loop
versions, ratio the stiffness by dividing the number of desired loops by the number of
full loops.
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9. Damping
Typically 10-25%, depending on size and input level. For specific damping
considerations, please consult Eidos Engineering.
Mounting Orientation
The diagrams below illustrate typical mounting orientations.
Compression
8
45° Compression / Roll
Fixed Roll

10. Technical data EWR-4
B
W
H
Size
Wire
diameter
[mm]
Loops
Height "H" Width "W" Unit weight
[mm]
[mm]
[g]
Max static
load
[N]
Max
deflection
[mm]
Vertical
stiffnes
[N/mm]
Roll
stiffness
[N/mm]
EWR-4-35-10
4
10
44.2
41.8
123
315
12.7
286
88
EWR-4-40-10
4
10
48.8
47.2
140
249
14.9
179
59
EWR-4-45-10
4
10
53.4
52.6
158
203
17.3
125
42
EWR-4-50-10
4
10
58.0
58.0
175
169
19.7
91
30
Size 35
Size 40
Size 45
Size 50
Size 35
Size 40
Size 45
Size 50
Note: Do not extrapolate plotted curves.
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11. Technical data EWR-8
B
W
H
Size
Wire
diameter
[mm]
[mm]
Loops
[mm]
[g]
Max static
load
[N]
74.0
673
1325
20.9
Height "H" Width "W" Unit weight
Max
deflection
[mm]
Vertical
stiffnes
[N/mm]
Roll
stiffness
[N/mm]
677
225
EWR-8-60-8
8
8
78.0
EWR-8-70-8
8
8
87.0
85.0
785
1010
25.3
427
142
EWR-8-80-8
8
8
96.0
96.0
897
801
29.9
286
95
EWR-8-90-8
8
8
105.0
107.0
1009
649
34.6
201
67
EWR-8-100-8
8
8
114.0
118.0
1121
542
39.4
146
49
Size 60
Size 70
Size 80
Size 90
Size 100
Size 60
Size 70
Size 80
Size 90
Size 100
10
Note: Do not extrapolate plotted curves.

12. Technical data EWR-10
B
W
H
Size
Wire
diameter
[mm]
Loops
[mm]
[kg]
Max static
load
[N]
Height "H" Width "W" Unit weight
[mm]
Max
deflection
[mm]
Vertical
stiffnes
[N/mm]
Roll
stiffness
[N/mm]
EWR-10-80-8
10
8
102.0
98.0
1.4
1850
28.3
698
232
EWR-10-95-8
10
8
115.5
114.5
1.7
1371
35.1
417
139
EWR-10-110-8
10
8
129.0
131.0
1.9
1060
42.0
268
89
EWR-10-120-8
10
8
138.0
142.0
2.1
910
46.8
207
69
EWR-10-130-8
10
8
147.0
153.0
2.3
789
51.7
163
54
Size 80
Size 95
Size 110
Size 120
Size 130
Size 80
Size 95
Size 110
Size 120
Size 130
Note: Do not extrapolate plotted curves.
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13. Technical data EWR-15
B
W
H
Size
Wire
diameter
[mm]
Loops
Max static
load
[N]
Height "H" Width "W" Unit weight
[mm]
[mm]
[kg]
Max
deflection
[mm]
Vertical
stiffnes
[N/mm]
Roll
stiffness
[N/mm]
EWR-15-95-8
15
8
130.5
119.5
3.7
6307
31.8
2110
701
EWR-15-120-8
15
8
153.0
147.0
4.7
4170
42.5
1050
348
EWR-15-135-8
15
8
166.5
163.5
5.3
3390
49.2
735
244
EWR-15-150-8
15
8
180.0
180.0
5.9
2822
56.0
536
178
EWR-15-170-8
15
8
198.0
202.0
6.7
2260
65.5
368
122
Size 95
Size 120
Size 135
Size 150
Size 170
Size 95
Size 120
Size 135
Size 150
Size 170
12
Note: Do not extrapolate plotted curves.

14. Technical data EWR-20
B
W
H
Size
Wire
diameter
[mm]
Loops
[kg]
Max static
load
[N]
Max
deflection
[mm]
Vertical
stiffnes
[N/mm]
Roll
stiffness
[N/mm]
Height "H" Width "W" Unit weight
[mm]
[mm]
EWR-20-130-8
20
8
177.0
163.0
9.1
10715
43.8
2600
865
EWR-20-160-8
20
8
204.0
196.0
11.2
7426
56.7
1400
464
EWR-20-190-8
20
8
231.0
229.0
13.3
5485
70.1
830
280
EWR-20-220-8
20
8
258.0
262.0
15.4
4240
84.1
537
178
Size 130
Size 160
Size 190
Size 220
Size 130
Size 160
Size 190
Size 220
Note: Do not extrapolate plotted curves.
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15. Eidos Engineering S.r.l.
headquarters: via Roveredo 20/b 33170 Pordenone, Italy
tel.: +39 0434 507547
fax: +39 0434 507546
e-mail: info@eidosengineering.com
web: www.eidosengineering.com
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