Which crane buffer do you need? A comparison between rubber and cellular.

Cranes are indispensable links in many industrial environments. But what happens when such a heavy machine reaches its endpoint? That’s when the crane buffer comes into play, a relatively small component with a big job: preventing damage and ensuring safety. With our many years of experience in industrial components, we know exactly how important these kinds of details are.

However, not every crane buffer is the same. Depending on the application, the weight of the crane, and the environment in which it operates, it is crucial to select the right type of buffer. Two commonly used types are the rubber crane buffer and the cellular buffer. At first glance, they may look similar, since both absorb energy at the point of stop. Yet there are clear differences in operation, durability, and suitability.

In this blog, we compare the advantages and disadvantages of both buffers and explain when rubber is the better option, and when a cellular buffer offers added value.

Rubber buffer (black)

The rubber buffer is a widely used crane buffer designed to absorb energy when a crane reaches its endpoint. These buffers are typically black in color and made of solid, durable rubber. They are engineered to absorb shocks, impacts, and vibrations, preventing damage to machinery and structures. Rubber buffers are popular due to their simplicity, reliability, and versatility in various industrial applications.

Advantages of a rubber buffer

Excellent damping: Rubber naturally has strong damping properties, helping to absorb shocks and vibrations when a crane reaches its endpoint or comes to a sudden stop.
Cost-effective: Rubber is often a budget-friendly choice, as it is relatively inexpensive to produce and requires minimal maintenance over its lifespan.
Weather resistance: Rubber withstands most weather conditions such as rain, moisture, and UV radiation, making it suitable for both indoor and outdoor industrial use.                                                                                                                            Flexibility: Rubber is highly flexible and can adapt to different forces without breaking, making it suitable for applications with varying and unpredictable loads.                                                                                                                                        Noise reduction: Rubber has natural sound-dampening properties, helping to reduce noise levels.

Disadvantages of a rubber buffer

Aging: Over time, rubber can deteriorate, especially when exposed to UV radiation and ozone, leading to cracks and stiffness.

Limited compression: Compared to other materials, rubber is less suitable for extremely high compressive forces and may deform faster under prolonged loads.

Susceptible to hydrolysis: Although rubber is moisture-resistant, it may be less resistant to hydrolysis, particularly in tropical or humid environments.

Cellular buffers (white)

The cellular buffer is an advanced crane buffer specifically designed for applications requiring higher energy absorption. These buffers are typically white in color and consist of a steel core combined with an elastomer or microcellular polyurethane material. The material is composed of small closed air cells that compress in a controlled manner under load, effectively absorbing energy.

Advantages of a cellular buffer

Superior damping and compression: Cellular buffers not only provide excellent damping but are also highly compressible, making them ideal for handling high loads in confined spaces.

Weather and moisture resistance: Cellular materials are resistant to moisture and hydrolysis aging, making them highly suitable for outdoor use. For tropical or very humid environments, special compounds can be manufactured.

Long lifespan: Thanks to their resistance to hydrolysis and aging, cellular buffers retain their properties longer than rubber under comparable conditions.

Space-saving: Due to their high compressibility, cellular buffers are well suited for applications with limited installation space.

Disadvantages of a cellular buffer

Higher cost: Cellular buffers are generally more expensive than rubber due to advanced materials and production techniques.

Lower sound absorption: While cellular buffers provide excellent damping, they may be less effective in reducing noise compared to rubber.

Which buffer suits your application?                                                                         

When to choose a rubber buffer

Rubber is ideal when cost efficiency and noise reduction are priorities in normal operating conditions. Rubber buffers are reliable in standard industrial environments and offer flexibility in use. They are a good option when lower costs are important and extreme loads or environmental conditions are not a concern. Keep in mind, however, that rubber may age over time and is less suitable for applications requiring very high compression or continuous heavy loads.

When to choose a (Diepo)Cell buffer

(Diepo)Cell is the right choice for applications requiring higher compression and better moisture resistance, especially in confined spaces. For tropical climates, a special compound can be provided. For larger sizes, additional safety options such as fall protection may be available. Cellular buffers are less cost-efficient compared to rubber, but they offer superior performance in demanding conditions.

Ultimately, the best choice depends on the specific application and environment. Both materials have their own strengths.

Need advice? Contact us

Whatever industry you’re in, Vijselaar is your partner in professional cable management. With years of experience and a wide range of components, we are happy to help you find a tailor-made solution. Contact us for free, no-obligation advice!