Stainless casters for food & washdown environments.
Washdown duty is a system specification — grade, finish, bearings, seals and chemistry together. This guide assembles the questions a food plant should put to any caster supplier, including us.
Default to 304 stainless for routine food and beverage washdown; move to 316 where chlorides are sustained (brine, seawater, aggressive chlorinated regimes). Specify the grade per component — fork, plate, axle, brake hardware, fasteners — because one carbon-steel part inside a 'stainless' caster restarts the rust clock. Then specify bearing sealing for wet duty and name your cleaning chemicals in the RFQ; compound and grade decisions both depend on them.
Why plated casters die in washdown plants
Zinc plating is a sacrificial coating measured in microns. Caustic foam cleaners, chlorinated sanitisers, hot water and steam consume it on a schedule, and once the steel beneath is exposed the fork rusts in an environment where rust is a hygiene nonconformance, not a cosmetic one. Stainless construction removes the coating from the system: damage is a scratch, not a breach. That is the entire economic argument — the stainless caster's service interval in a washdown plant is measured against two or three generations of plated casters.
304 vs 316, without the sales fog
- 304 — the food industry's default equipment grade; resists routine washdown chemistry, food acids and oxidising cleaners. Most plants, most of the time.
- 316 — adds molybdenum for chloride resistance: brine, seawater, and sustained high-chloride regimes. Costs more, and earns it only where chlorides are real.
- The comparison trap — a 304 caster quoted against a 316 competitor (or the reverse) without grades named is not a comparison. Our stainless line leads with 304 and quotes 316 as its own specification when the environment calls for it.
The hygiene specification checklist
- Grade per component — fork, top plate, axle, brake mechanism and hardware, each named.
- Surface finish — smooth finishes soil less and sanitise faster; state the finish, don't admire it in photos.
- Bearing sealing — wet-duty arrangements stated; an open bearing is a water and soil trap.
- Crevices and hollows — ask how the fork design handles soil accumulation and drainage against your sanitation standard.
- Chemistry by name — your actual cleaners and sanitisers, with concentrations and temperatures, in the RFQ. 'Food grade' is not a chemistry answer.
- Wheel material — PU tread is the washdown standard pairing; confirm compound compatibility with your regime alongside the fork decision.
Where heat joins washdown
Bakeries and cook-chill plants run casters that are washed and heated in the same shift. Fork grade and wheel material separate there: the stainless decision governs the fork, the phenolic line governs the wheel, and the bearing arrangement must satisfy both. If that is your plant, say so in one RFQ — the combined specification is routine once both halves are on the table.
Related guides
Specification first. Price second.
Every guide on this site ends at the same place: a locked specification and a sample that proves it.