Can rubber casters be used in high-temperature environments?

Whether rubber casters can be used in high-temperature environments depends crucially on the heat resistance of the rubber material. Different rubber types have significantly different heat resistance capabilities, so it's difficult to generalize. This depends on the specific material and operating temperature range:

 

1. Ordinary rubber (natural rubber, styrene-butadiene rubber): Not suitable for high-temperature environments
Natural rubber and styrene-butadiene rubber are the most common basic rubber materials. Their upper limit for heat resistance is very low, typically only able to withstand temperatures between -20°C and 80°C.

 

When the ambient temperature exceeds 80°C, the material softens rapidly, losing elasticity, and even causing adhesion and deformation, resulting in a sharp decrease in the caster's load capacity and increased rolling resistance.

 

Extended exposure to temperatures above 80°C (such as near ovens or boilers) accelerates rubber aging, hardening, and cracking, resulting in a rapid loss of functionality and even the risk of the wheel falling off.

 

These casters are only suitable for use indoors at room temperature (such as office carts and household trolleys) and are completely unsuitable for high-temperature environments.

 

2. Heat-Resistant Rubber (Nitrile-Butadiene Rubber, Ethylene Propylene Diene Rubber): Suitable for medium-low and high-temperature environments.
Some specialty rubbers can withstand even higher temperatures and are suitable for applications with moderately high temperature requirements:

 

Nitrile-Butadiene Rubber: Offers excellent oil resistance and a maximum temperature resistance of approximately 120°C (can withstand 150°C for short periods). Suitable for applications requiring oil resistance and temperatures below 120°C (such as oil-stained carts in machining workshops and moderate-temperature environments near machine tools).

 

Ethylene Propylene Diene Diene Rubber (EPDM): Offers excellent weather and ozone resistance, a maximum temperature resistance of approximately 150°C (can withstand 180°C for short periods), and resists aging at high temperatures. Suitable for outdoor applications with high temperatures or indoor applications with sustained moderate temperatures (such as carts outside the drying area of ​​a food processing plant).

 

However, please note: This type of rubber cannot withstand extremely high temperatures. Exceeding this temperature limit can lead to elastic failure and structural deformation.

 

3. High-temperature-resistant special rubber (silicone rubber, fluororubber): Suitable for use in high and even ultra-high temperature environments.
For use in extreme high-temperature environments exceeding 150°C (such as around ovens, high-temperature assembly lines, and high-temperature chemical reaction areas), choose casters made of silicone rubber or fluororubber:

 

Silicone rubber: The typical temperature resistance range is -60°C to 250°C, with some high-specification products capable of withstanding temperatures up to 300°C for short periods. They maintain excellent elasticity at high temperatures, are resistant to aging, and release no harmful substances. They are suitable for high-temperature applications in the food and medical industries (such as baking tray carts in bakery shops and transporting high-temperature equipment in sterilization rooms).

 

Fluororubber (FKM): Offers even greater heat resistance, with a typical upper temperature range of 200°C to 260°C. They can withstand temperatures exceeding 300°C for short periods. They are also resistant to chemical corrosion (acids, alkalis, and organic solvents), making them suitable for complex industrial environments subject to extreme heat and corrosion (such as carts around high-temperature chemical reactors and transporting high-temperature materials in metallurgical workshops).

 

Conclusion: Choose the right rubber material based on the temperature.
If the ambient temperature is ≤80°C (normal/medium temperature): Ordinary rubber, nitrile rubber, and EPDM casters can all be used, with oil and weather resistance being the primary consideration.

 

If the ambient temperature is 80°C to 150°C (medium/high temperature): Choose nitrile rubber (oil-resistant) or EPDM casters.

 

If the ambient temperature is >150°C (high/extremely high temperature): Choose silicone rubber or fluororubber casters only, and verify the specific upper temperature rating on the product label to avoid false labeling.

 

In addition, in high-temperature environments, pay attention to the caster's bearing material (preferably high-temperature bearing steel to prevent ordinary bearings from seizing at high temperatures) and wheel core material (choose high-temperature-resistant plastic or metal to prevent softening of the wheel core and resulting in wheel detachment) to ensure the overall structure is suitable for high-temperature operating conditions.