Food, pharmaceutical and cleanroom facilities have strict hygiene requirements. The wrong caster wheels can leave marks, shed dust or degrade when exposed to disinfectants. This article summarises the criteria for choosing wheels that meet the standards and work in practice.
Key Criteria to Check
- Non-marking: choose light-coloured or non-transferring PU instead of black rubber, which leaves marks
- Resistant to water and cleaning chemicals: with frequent floor washing, wheels must not rust and bearings should be sealed against water
- Easy to clean: a smooth tread surface that does not trap debris, reducing germ build-up
- Real load capacity: raw materials and liquid drums are heavy and need a cast-iron core to carry the load
Why cast-iron-core PU fits: it leaves no marks on epoxy floors, resists oil and chemicals well, has a smooth, easy-to-clean surface, and the steel core carries heavy loads — meeting both hygiene and strength requirements
Compared with Other Tread Materials
| Tread material | Cleanliness | Chemical resistance |
|---|---|---|
| PU with cast-iron core | Non-marking | Good |
| Black rubber | Leaves marks | Degrades easily |
| Solid stainless steel | Clean | Good but noisy/hard |
Summary
For work that demands clean floors and frequent washing, cast-iron-core PU wheels offer the best balance of cleanliness, durability and load capacity.