A Practical Guide To Anti-Vibration Mounts For Industrial Use

All types of modern machinery produce some level of vibration during operation. While this is a natural by-product of moving components, excessive vibration can quickly become a serious problem for industries that rely heavily on their mechanical equipment. If left unmanaged, vibration can reduce operational efficiency, shorten the lifespan of machinery, and even compromise workplace safety. There is also the risk of structural damage. Persistent vibration can weaken surrounding components, loosen fixtures, and increase the likelihood of breakdowns. This often leads to more frequent repairs and premature equipment replacement.

To address these issues, many industries rely on anti-vibration mounts to protect both machinery and the structures supporting them. These mounts act as vibration dampers, preventing unwanted oscillations from spreading through equipment or building structures. Most are manufactured from rubber or combinations of rubber and metal, as these materials offer excellent energy absorption and noise reduction properties.

However, recognising the need for vibration isolation is only the first step. The real challenge lies in selecting the right anti-vibration mount for your specific equipment and operating conditions. The ideal mount must match your machinery’s weight, vibration characteristics, and environment to deliver optimal performance.

This guide explores the key factors to consider when choosing anti-vibration mounts and how to ensure they provide reliable long-term protection for your equipment.

 

Why proper anti-vibration mount selection matters for industrial machinery

Anti-vibration mounts act as a buffer between machinery and the surfaces supporting it, such as floors, frames, or foundations. They absorb mechanical energy produced by moving components and convert a portion of that energy into heat, reducing vibration amplitude and preventing its transfer to surrounding structures.

By isolating vibration at its source, these mounts help keep machinery stable and quieter during operation. This contributes to smoother performance and a more controlled working environment.

Although vibration may appear harmless at first, continuous oscillation can lead to several long-term mechanical problems. Over time, vibration can:

• Loosen bolts and fasteners
• Misalign rotating shafts
• Accelerate wear on bearings and moving parts
• Damage sensitive electrical components

In industrial production lines, even small misalignments can affect product quality or cause inconsistent output. Over extended periods, these issues accumulate and result in costly downtime and higher maintenance expenses. Selecting the correct anti-vibration mount helps prevent these problems by isolating vibration effectively before it spreads throughout the machine or facility.

 

Key aspects to consider when choosing anti-vibration mounts

1. Equipment specifications

Before selecting a mount, it is essential to understand the physical characteristics of your machinery. Start by determining the total weight of the equipment, including the base frame, motors, and any attached components. Once the overall weight is known, divide it by the number of mounts that will support the machine. This provides an estimate of the load that each mount must handle. For example, if a machine weighs 800 kg and is supported by four mounts, each mount would carry approximately 200 kg under ideal conditions.

However, load distribution is rarely perfectly balanced. The centre of gravity must also be considered, as some mounts may carry a greater share of the load depending on the machine’s layout. Uneven distribution can place excessive stress on certain mounts, leading to premature failure.

To ensure reliable support:

• Verify that each mount’s rated load capacity exceeds the applied load
• Adjust mount placement to account for uneven weight distribution
• Install machinery on a clean, flat, and level surface

Another important factor is the difference between static and dynamic loads. Static loads refer to the weight placed on the mount when the machine is stationary. On the other hand, dynamic loads occur during operation and include forces generated by movement, impacts, or oscillations.

Some machines, such as crushers or heavy stamping equipment, generate strong shocks during operation. In these cases, mounts must have sufficient damping capability to absorb sudden impacts without becoming compressed beyond their design limits. Understanding both static and dynamic forces ensures the mount performs effectively under real operating conditions.

2. Vibration characteristics

Equally important is understanding how the equipment vibrates during operation. Machines generate vibrations at specific frequencies and amplitudes, which vary depending on operating speed and mechanical design.

• Amplitude describes the distance a machine moves during vibration.
• Frequency refers to how quickly these oscillations occur.

When vibration amplitude is high, a stiffer mount may be required to limit excessive movement and prevent instability or rocking. Increasing the spacing between mounts can also improve stability and reduce tilting. Proper mount selection requires matching the stiffness and damping characteristics of the mount to the vibration behaviour of the machine.

Another important concept is vibration isolation efficiency, which measures how effectively a mount reduces transmitted vibration. This performance is influenced by several factors, including disturbing frequency, static deflection, and isolation ratio or efficiency percentage. In general, effective vibration isolation occurs when the machine’s excitation frequency is significantly higher than the mount’s natural frequency. A frequency ratio above approximately 1.4 typically indicates efficient vibration isolation.

Manufacturers often provide load-deflection curves to assist with mount selection. These charts show how much a mount compresses under load and help engineers avoid excessive deformation or overly stiff configurations that could reduce isolation performance.

3. Operating environment

The environment in which machinery operates also plays a significant role in determining the most suitable anti-vibration mount. Machines installed in different locations, such as rooftops, factory floors, marine environments, or outdoor installations, face varying environmental conditions. These factors can influence the durability and performance of vibration mounts.

Outdoor environments may expose mounts to:

• Rain and humidity
• Ultraviolet radiation
• Dust and debris

Indoor environments can present different challenges, including:

• Oil or grease exposure
• Chemical contact
• High humidity levels

Temperature is another critical consideration. Many vibration mounts rely on elastomer materials that can change properties when exposed to extreme temperatures. High heat may soften certain materials, while very low temperatures can make them stiff or brittle.

To maintain reliable performance, choose mounts designed for the specific environmental conditions in which the equipment will operate. Materials resistant to moisture, temperature changes, and chemical exposure will significantly extend the mount’s service life.

 

What are the different types of vibration mounts?

Anti-vibration mounts come in a variety of designs, each suited for different machinery types and operating conditions. Understanding the most common options helps ensure the correct mount is selected for the job.

1. Vibration isolators

Vibration isolators are designed to reduce the transfer of vibration from a machine to surrounding structures. They can also minimise external vibrations that travel from the foundation into the machine itself.

These mounts are commonly used in heating and ventilation systems, fans, generators, and equipment within food or pharmaceutical manufacturing environments.

2. Rubber vibration mounts

Rubber vibration mounts are among the most widely used vibration isolation solutions. They provide vibration and shock protection in multiple directions while also offering resistance to oil and grease.

Because of their versatility, rubber mounts are commonly used in engines, generators, and machinery across the automotive and marine industries.

3. Wire rope mounts

Wire rope mounts are constructed entirely from stainless steel cables wound between metal retaining bars. This design makes them extremely durable and corrosion-resistant.

They can isolate shock and vibration from multiple directions and perform well in harsh environments such as offshore installations, defence equipment, and heavy-duty industrial machinery.

4. Conical mounts

Also known as rubber cone mounts, conical mounts provide strong support under both compression and shear loads. With the addition of proper washers, they can handle high loads while maintaining fail-safe characteristics.

These mounts are often used in mobile applications such as commercial vehicles, marine engines, and construction equipment.

5. Sandwich mounts

Sandwich mounts are made with dense rubber layers secured between metal plates. They absorb vibration through either compression or shear, depending on the design.

This type of mount is commonly used for pumps, compressors, and engines where moderate flexibility and compact installation are required.

6. Rubber-metal bonded mounts

These mounts combine elastomer materials with metal components to balance flexibility and structural strength. They are available in a variety of shapes, including cylindrical mounts, conical mounts, and levelling feet.

They are frequently used in CNC machines, industrial presses, and electronic control panels, where stable support and noise reduction are essential.

7. Pneumatic isolators

Pneumatic isolators, also known as air mounts, use compressed air chambers to achieve extremely high levels of vibration isolation.

They are typically used for sensitive equipment that requires minimal vibration transfer, such as laboratory instruments, precision measurement systems, and testing equipment.

 

Mount characteristics and what to look out for

1. Mount material

The material used in a vibration mount has a major influence on its performance and durability. Different materials offer different levels of vibration damping, temperature resistance, and chemical stability.

Common materials include:

• Rubber – Excellent vibration damping with moderate resistance to heat and oils.
• Silicone – Suitable for high-temperature environments and specialised equipment.
• EPDM – Offers strong resistance to weather, ozone, and extreme temperatures.
• Neoprene – Provides good mechanical strength and oil resistance.
• Polyurethane – Known for excellent wear resistance and durability in industrial machinery.

Choosing the correct material ensures that the mount performs reliably under the specific operating conditions of your equipment.

2. Durometer rating

The durometer rating measures the hardness of elastomer materials. This property significantly affects how effectively a mount isolates vibration.

Typical durometer ranges include:

• 20–25 – Soft materials offering excellent vibration isolation.
• 40–60 – Medium hardness providing a balance between load capacity and damping.
• 80+ – Hard materials capable of supporting heavier loads but with reduced vibration absorption.

Soft mounts provide superior vibration isolation but may not support heavy loads. Harder mounts offer greater structural strength but may transmit more vibration. Selecting the appropriate hardness ensures the mount supports the machine while still providing effective isolation.

3. Hysteresis

Hysteresis refers to a material’s ability to absorb and dissipate energy during repeated deformation. In vibration mounts, this property plays an important role in reducing the amount of vibration transmitted through the system. As the mount compresses and relaxes during operation, internal molecular movement within the material converts part of the vibration energy into heat. This process reduces the amplitude of vibration reaching the surrounding structure.

Materials with strong hysteresis properties can effectively dampen vibration, particularly when operating near the system’s natural frequency. Selecting mounts with good hysteresis characteristics helps maintain equipment stability and prolongs service life.

 

Conclusion

Industrial machinery inevitably generates vibration, but allowing these vibrations to spread unchecked can lead to mechanical wear, structural damage, and costly downtime. Anti-vibration mounts play a crucial role in preventing these issues by isolating vibration at its source.

Looking to reduce vibration and protect your equipment from unnecessary wear? Pharmchem Engineering provides high-quality anti-vibration mounts designed to enhance stability, minimise noise, and extend the lifespan of industrial machinery. Contact our team today to explore our range of vibration isolation solutions and find the right mount for your operational needs.