Potential environmental problems
The environment in which a castor will be used affects the choice you make.
Temperature
This table shows the temperature ranges for different tread materials.
| Continuous use | Momentary use | Minimum | |
| Polyamide | + 80 °C | + 130 °C | – 40 °C |
| Polyurethane | + 80 °C | + 100 °C | – 30 °C |
| Aluminium | + 280 °C | + 300 °C | – 40 °C |
| Heat-resistant rubber | + 250 °C | – | – 40 °C |
| Rubber | + 50 °C | + 70 °C | – 30 °C |
| Thermoelastic rubber | + 130 °C | + 150 °C | – 40 °C |
| Sealings of the swivel bearings | + 80 °C | + 100 °C | – 30 °C |
| Polypropylene | + 50 °C | + 70 °C | – 10 °C |
Note: Different materials for centres and treads are used in castors. Their thermal resistance is the same as the lowest temperature of the wheel tread.
Minimum temperatures are not applicable in the case of shock loads. At sub-zero temperatures, wheels do not withstand shock loads.
If a castor will be used even occasionally at temperatures below – 25ºC, the use of special lubricants is recommended – please ask us for advice.
Chemicals
If you would like information on the treads’ resistance to chemicals, please get in touch.