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Wire Rope Isolators

Wire Rope Isolators

High Performance Vibration Isolation Products

Look to ITT Enidine Inc. for high performance Wire Rope Isolators and Compact Wire Rope Isolators. The wire rope isolators have stainless steel cable and aluminum retaining bars, which provides excellent vibration isolation. The isolators are corrosion resistant, which makes them environmentally stable and high-performance in a variety of applications. The isolators are completely unaffected by oil, chemicals, abrasives, ozone, and temperature extremes. 

The compact wire rope isolator is smaller than a traditional wire rope and can absorb shock and vibration in small spaces. Single point mounting offers flexibility for integration into existing products. 
Wire Rope Isolators
With versatile mounting options, crimping patterns, and size variation, helical isolator products can help your systems meet all requirements for industrial, defense, and commercial uses. ITT Enidine Inc. has a commitment to quality and all products meet the industry standards of DEF-STND 0755, MIL-STD-810, BV43-44, MIL-STD-167, STANAG-042, MIL-S-901, and MIL-E-5400. 

Both compact wire rope isolators and wire rope isolators can be used on galley components where motors and fans produce vibrations onto surrounding structures. They can also be used to control vibration and thermal expansion.

Datasheets

Specifications

  • Shock and vibration isolation up to 100,000 pounds
  • 45 degree compression/roll
  • Fixed roll
  • Stainless steel materials
  • Fixed shear

FAQ

Are elastomeric parts or Wire Rope Isolators (WRI) better for severe shock applications?

WRI are naturally well suited for shock isolaton. Elastomeric parts can be specifically designed for severe shock and perform very well.

Are elastomeric parts or Wire Rope Isolators (WRI) better suited to very specific multi axis stiffness requirements?

Elastomers are more flexible in creating custom isolator performance in multi axis systems. The WRI can also be wound differently to customize stiffness.

at is damping?

Describes the dissipation of energy with time or displacement. There are many common types of damping; viscous damping (orifice in a hydraulic shock absorber), hysteretic damping (occurs in an elastomeric isolator), and coulomb damping (as in a wire rope isolator).

Do the three digit Wire Rope Isolator (WRI) model index numbers have any meaning?

The difference between a 200, 400, 600, and 800 index number has relative meaning within a series. The larger the number the taller the isolator but the lower the isolator stiffness.

Do the Wire Rope Isolators (WRI) provide the same stiffness in tension and compression?

No, the tension stiffness is significantly greater than the compression stiffness. Also, ITT Enidine Inc. Incorporated does not recommend that the WRI be used in tension.

Does ITT Enidine Inc. Incorporated manufacture Wire Rope Isolators (WRI) for corrosive environments?

Yes, The ITT Enidine Inc. Incorporated standard WRI product is made from stainless steel and aluminum. The standard product can be used successfully in most normal indoor environments. Where greater protection is required, such as exposure to salt water or corrosive chemicals, stainless steel should be considered.

Does the Wire Rope Isolator dash number at the end of the model number have meaning?

In general it represents the number of loops in the isolator.

How can noise be reduced?

In order to be able to reduce disturbing noise levels, it is very important to identify two key elements. The first element is the source of the noise. The second is the frequency of the noise. Typically a vibration mount designed in accordance with vibration.

How do Wire Rope Isolators (WRI) compare to elastomers regarding use over a broad temperature range?

The WRI can be used over a greater temperature range with less change in performance. Proper elastomer selection will make elastomers useful for most applications.

How much damping can be expected from a Wire Rope Isolator (WRI)?

WRI have between 5% and 20% damping. The amount of damping is related to wire diameter and stroke. The larger the wire diameter, the more damped (and stiffer) the isolator. Damping can be less with small amplitude vibration.

What are degrees of freedom?

This represents the six directions of movement that a vibration isolation device such as an elastomer or wire rope isolator is capable of traveling.

What does the WR series number represent on standard Wire Rope Isolator (WRI)?

The number following WR represents the wire diameter in 32nd of an inch. The WR5 series isolators use 5/32” diameter wire.

What is coulomb damping?

The system is said to have coulomb or dry friction damping if the damping force in a vibratory system is constant and independent of position or velocity of the system.

What is critical damping?

Critical damping is the smallest amount of damping required to return a system to its equilibrium position without oscillation.

What is damping factor?

A dimensionless ratio, which defines the amount of damping in a system. Commonly defined as C/Cr.

What is excitation frequency?

Defined as the number of oscillations per unit time that an external force or displacement is applied to a system, can also be referred to as 'forcing frequency'. Typically measured in Hz (cycles per second).

What is fragility?

Describes the amount of shock or vibration that a particular piece of equipment can withstand. Isolation systems are often designed to limiit the transmission of forces to the fragility level of the isolated equipment.

What is G?

G is the value of acceleration produced by the force of gravity.

What is isolation efficiency?

Isolation efficiency is the percent of vibration force or motion that is not transmitted through the vibration mount.

What is loss factor?

Loss factor is the measure of the damping value in an elastomer.

What is natural frequency?

Is the frequency at which oscillating system will vibrate if displaced from its equilibrium position and allowed to vibrate freely. Often described as Fn and measured in Hz(cycles per second).

What is noise?

Noise is vibration of air. Vibrations of the air typically have a frequency and an intensity (loudness) level. Noise is what you hear with your ear.

What is resonance?

When the frequency of excitation is equal to the natural frequency of a system, resonance occurs. When this happens there is amplification of the vibration input to the system and this can only be limited by the damping in the isolation system.

What type of mounting option should I select on a Wire Rope Isolator (WRI)?

Application dependent, but in general, for shock applications use mounting options "B," "D," or "E".

Which is better suited for high frequency vibration, an elastomer or Wire Rope Isolator (WRI)?

Elastomers are typically better for high frequency vibration (>500 Hz). Both are well suited for mid frequency isolation (20 to 100 Hz).

Wire Rope Isolators

Wire Rope Isolators

High Performance Vibration Isolation Products

Look to ITT Enidine Inc. for high performance Wire Rope Isolators and Compact Wire Rope Isolators. The wire rope isolators have stainless steel cable and aluminum retaining bars, which provides excellent vibration isolation. The isolators are corrosion resistant, which makes them environmentally stable and high-performance in a variety of applications. The isolators are completely unaffected by oil, chemicals, abrasives, ozone, and temperature extremes. 

The compact wire rope isolator is smaller than a traditional wire rope and can absorb shock and vibration in small spaces. Single point mounting offers flexibility for integration into existing products. 
Wire Rope Isolators
With versatile mounting options, crimping patterns, and size variation, helical isolator products can help your systems meet all requirements for industrial, defense, and commercial uses. ITT Enidine Inc. has a commitment to quality and all products meet the industry standards of DEF-STND 0755, MIL-STD-810, BV43-44, MIL-STD-167, STANAG-042, MIL-S-901, and MIL-E-5400. 

Both compact wire rope isolators and wire rope isolators can be used on galley components where motors and fans produce vibrations onto surrounding structures. They can also be used to control vibration and thermal expansion.

Datasheets
Specifications
  • Shock and vibration isolation up to 100,000 pounds
  • 45 degree compression/roll
  • Fixed roll
  • Stainless steel materials
  • Fixed shear

Are elastomeric parts or Wire Rope Isolators (WRI) better for severe shock applications?

WRI are naturally well suited for shock isolaton. Elastomeric parts can be specifically designed for severe shock and perform very well.

Are elastomeric parts or Wire Rope Isolators (WRI) better suited to very specific multi axis stiffness requirements?

Elastomers are more flexible in creating custom isolator performance in multi axis systems. The WRI can also be wound differently to customize stiffness.

at is damping?

Describes the dissipation of energy with time or displacement. There are many common types of damping; viscous damping (orifice in a hydraulic shock absorber), hysteretic damping (occurs in an elastomeric isolator), and coulomb damping (as in a wire rope isolator).

Do the three digit Wire Rope Isolator (WRI) model index numbers have any meaning?

The difference between a 200, 400, 600, and 800 index number has relative meaning within a series. The larger the number the taller the isolator but the lower the isolator stiffness.

Do the Wire Rope Isolators (WRI) provide the same stiffness in tension and compression?

No, the tension stiffness is significantly greater than the compression stiffness. Also, ITT Enidine Inc. Incorporated does not recommend that the WRI be used in tension.

Does ITT Enidine Inc. Incorporated manufacture Wire Rope Isolators (WRI) for corrosive environments?

Yes, The ITT Enidine Inc. Incorporated standard WRI product is made from stainless steel and aluminum. The standard product can be used successfully in most normal indoor environments. Where greater protection is required, such as exposure to salt water or corrosive chemicals, stainless steel should be considered.

Does the Wire Rope Isolator dash number at the end of the model number have meaning?

In general it represents the number of loops in the isolator.

How can noise be reduced?

In order to be able to reduce disturbing noise levels, it is very important to identify two key elements. The first element is the source of the noise. The second is the frequency of the noise. Typically a vibration mount designed in accordance with vibration.

How do Wire Rope Isolators (WRI) compare to elastomers regarding use over a broad temperature range?

The WRI can be used over a greater temperature range with less change in performance. Proper elastomer selection will make elastomers useful for most applications.

How much damping can be expected from a Wire Rope Isolator (WRI)?

WRI have between 5% and 20% damping. The amount of damping is related to wire diameter and stroke. The larger the wire diameter, the more damped (and stiffer) the isolator. Damping can be less with small amplitude vibration.

What are degrees of freedom?

This represents the six directions of movement that a vibration isolation device such as an elastomer or wire rope isolator is capable of traveling.

What does the WR series number represent on standard Wire Rope Isolator (WRI)?

The number following WR represents the wire diameter in 32nd of an inch. The WR5 series isolators use 5/32” diameter wire.

What is coulomb damping?

The system is said to have coulomb or dry friction damping if the damping force in a vibratory system is constant and independent of position or velocity of the system.

What is critical damping?

Critical damping is the smallest amount of damping required to return a system to its equilibrium position without oscillation.

What is damping factor?

A dimensionless ratio, which defines the amount of damping in a system. Commonly defined as C/Cr.

What is excitation frequency?

Defined as the number of oscillations per unit time that an external force or displacement is applied to a system, can also be referred to as 'forcing frequency'. Typically measured in Hz (cycles per second).

What is fragility?

Describes the amount of shock or vibration that a particular piece of equipment can withstand. Isolation systems are often designed to limiit the transmission of forces to the fragility level of the isolated equipment.

What is G?

G is the value of acceleration produced by the force of gravity.

What is isolation efficiency?

Isolation efficiency is the percent of vibration force or motion that is not transmitted through the vibration mount.

What is loss factor?

Loss factor is the measure of the damping value in an elastomer.

What is natural frequency?

Is the frequency at which oscillating system will vibrate if displaced from its equilibrium position and allowed to vibrate freely. Often described as Fn and measured in Hz(cycles per second).

What is noise?

Noise is vibration of air. Vibrations of the air typically have a frequency and an intensity (loudness) level. Noise is what you hear with your ear.

What is resonance?

When the frequency of excitation is equal to the natural frequency of a system, resonance occurs. When this happens there is amplification of the vibration input to the system and this can only be limited by the damping in the isolation system.

What type of mounting option should I select on a Wire Rope Isolator (WRI)?

Application dependent, but in general, for shock applications use mounting options "B," "D," or "E".

Which is better suited for high frequency vibration, an elastomer or Wire Rope Isolator (WRI)?

Elastomers are typically better for high frequency vibration (>500 Hz). Both are well suited for mid frequency isolation (20 to 100 Hz).