High temperature casters, rated by test — not by brochure.

Most caster materials surrender to heat in sequence. Rubber degrades, polyurethane softens and eventually delaminates, standard bearing grease thins and escapes. Phenolic resin wheels are the traditional answer: a thermoset material that holds its properties at temperatures that ruin elastomers, rolls on hot floors without picking up damage, and shrugs off the steam and washdown that accompany bakery and food heat processes.

Why this page publishes no temperature number

You will notice this page does not state a maximum temperature. That is deliberate, and it is the most honest thing on it. High temperature claims in this industry are routinely copied from material datasheets to product pages without the assembled caster — wheel, bearing, grease, fork — ever being tested as a unit. CASTOVELLA's discipline: the rating for this line is set by baking the production sample at temperature, under load, for a sustained period, and inspecting the result. Until that test is run for a given configuration, the quotation describes the construction and the test protocol — and the verified rating follows the sample. If a competitor's number looks better, ask them for the test report on the assembled caster.

The rest of the heat specification

• Bearings and grease. High-temperature bearing arrangements and grease specified for the duty — the grease is usually the first component to fail, so it is specified, not assumed.
• Exposure pattern. Continuous heat, cycling in and out of ovens, and radiant-only exposure are different duties. Bakery racks cycle; curing lines sit. Tell us the pattern.
• Load at temperature. Capacity is derated by heat in every material system; the quotation states capacity against the tested temperature condition, not the room-temperature number.
• Floor and debris. Hot environments carry flour dust, curing compounds and washdown; wheel and bearing sealing are specified against your actual floor.

The lead configuration is the 4 inch high temperature phenolic caster for rack and trolley duty. Food-plant buyers running both heat and washdown should also read the stainless and washdown guide — fork material and wheel material are separate decisions.

The specification we lock before quoting

A quotation is only comparable when the specification underneath it is fixed. For this line — as for every CASTOVELLA line — the written quotation locks these six variables, and the production sample is checked against them before bulk production is approved:

• Wheel diameter and width — width is both a performance variable and the US tariff classification variable; it is measured on the sample, not copied from a catalogue.
• Tread material and hardness — stated as a Shore hardness range, so the bulk shipment can be checked against the approved sample.
• Bearing type — plain, roller or precision ball bearing, named on the quotation; bearing swaps are the most common silent downgrade in this industry.
• Fork and top plate thickness — measured in millimetres and stated, because fork flex is where cheap heavy duty casters fail first.
• Load capacity and test method — capacity per caster with the test convention named (EN 12532 / ANSI ICWM), never a bare number.
• Finish and hardware — zinc plating, stainless grade or coating stated per component, not per marketing photo.