How to choose the right oil-resistant caster?

Selecting the right oil-resistant caster requires focusing on "scenario suitability." This involves carefully screening the four dimensions of load capacity, oil characteristics, environmental conditions, and detailed design. The specific steps are as follows:

First, determine the core load requirements and calculate the load capacity of a single wheel (total weight divided by the number of casters, allowing a 20%-30% safety margin). For heavy-duty applications (such as industrial equipment), nylon (PA) or high-strength polyurethane (PU) are preferred. For light-duty applications (such as tool carts), nitrile rubber (NBR) is recommended to avoid wheel deformation due to insufficient load capacity.

Second, match the material based on the oil type: For contact with mineral oils (motor oil, lubricating oil), choose PU or nylon for their strong swelling resistance. For contact with vegetable oils (edible oil), choose food-grade PU or NBR to prevent the release of harmful substances. For contact with strong solvents (gasoline), choose NBR or PTFE-coated casters; ordinary PU tends to soften and fail. Then, adjust your selection based on environmental conditions: For high temperatures (>80°C), eliminate standard PU and choose nylon or PTFE. For low temperatures (<-10°C), avoid nylon and choose cold-resistant PU or NBR. For flat surfaces, use hard materials (nylon, hard PU), and for uneven surfaces, use elastic materials (soft PU, NBR). For locations with heavy oil and dust, choose casters with sealed bearings (dust cap + seal) to prevent sticking.

Finally, pay attention to design details: Choose galvanized steel or stainless steel for the bracket to prevent oil corrosion and rust. For fixed positions, choose casters with dual brakes (wheel brake + directional brake), which are more stable than single brakes. Choose wheel treads with bubble-free and rounded edges to reduce noise and floor wear.

Following the "calculate load → identify oil type → examine the environment → review details" process, you can accurately select oil-resistant, durable, and safe casters, avoiding frequent replacement.