Heavy-duty high-temperature plate casters with the 4″ x 4-1/2″ mount — bigger plate than the bakery oven rack (3-1/8″ x 4-1/8″) spec, designed for heavier industrial applications running at sustained elevated temperatures. 28 styles spanning 4″ through 8″ wheels at 300-1,250+ lb per caster. Two material classes: phenolic (TP-series, dry heat to 475°F continuous, 525°F intermittent) and glass-filled nylon (NP-series, moist heat with autoclave compatibility, 475°F continuous, 530°F intermittent). Used for paint booth carts, large production ovens, foundry-adjacent transport, and powder coating cure equipment.
| Wheel Size | Phenolic (TP / dry heat) | Glass-Filled Nylon (NP / moist heat) | Application |
|---|---|---|---|
| 4″ x 1-1/2″ | 300 lb @ 475°F | 300 lb @ 475°F | Small paint booth, cure carts |
| 4″ x 2″ | 800 lb @ 475°F | 700 lb @ 475°F | Medium paint booth, oven-adjacent transport |
| 5″ x 2″ | 1,000 lb @ 475°F | 900 lb @ 475°F | Standard HD paint booth, powder coat cure |
| 6″ x 2″ | 1,200 lb @ 475°F | 1,100 lb @ 475°F | Heavy production ovens, foundry-adjacent |
| 8″ x 2″ | 1,250 lb @ 475°F | 1,250 lb @ 475°F | Heaviest HD high-temp applications |
Powder coating cure ovens, dry-cycle bakery production, paint booth bake-down, dry foundry-adjacent transport. Phenolic absorbs moisture if exposed to steam or wash cycles — the wheel swells and dimensions shift, throwing wheel-to-floor clearance off.
Smokehouse rack carts, wet-cycle bakery proofers, autoclaves, sterilizer carts that cycle through steam. The 30% glass-fiber reinforcement gives the nylon dimensional stability through wet-dry transitions. Same temperature rating as phenolic.
Step over to specialty high-temp materials (epoxy resin, ceramic composite) — see High Temperature Casters for the broader catalog above 575°F.
Oven rack casters (Baxter/Hobart/BKI commercial bakery oven spec) use the smaller 3-1/8″ x 4-1/8″ top plate — designed for the specific oven rack frame those manufacturers ship. The 4″ x 4-1/2″ plate on THIS page is the medium-heavy industrial standard mount — matches paint booth carts, larger production ovens, powder coating equipment, and custom shop-built heat-rated rolling stock. For commercial bakery rack ovens specifically, see Bakery Oven Rack Casters.
At 475°F continuous: full rated capacity. At 525°F intermittent (under 30 minutes per cycle): derate capacity 25-30% — a 1,000 lb rated wheel handles 700-750 lb in the 475-525°F range. Above 525°F: phenolic and glass-filled nylon both soften and start to permanently deform. For sustained operation above 525°F, step up to epoxy resin (TPR-series, 475°F continuous / 550°F intermittent) or specialty high-temp casters.
Glass-filled nylon (NP-series) carries NSF food-grade certifications for the wheel material — usable on food production rack carts, smokehouse equipment, and bakery cycle carts. Phenolic is NOT NSF-certified for food contact, but is acceptable for non-food-contact heat applications like paint booth carts and powder coating. NSF documentation available for NP-series part numbers at info@casterhq.com.
Yes — phenolic is a hard composite (90D durometer) that can crack or chip when the wheel hits hard impact: dropping a cart corner off a 1″+ curb, crossing rough warehouse floor seams at speed, or impact with weld spatter on a foundry-adjacent floor. Phenolic is the spec for smooth indoor concrete or tile under sustained heat. For rough-floor high-temp applications, glass-filled nylon handles impact better (slight tread give absorbs the shock).
Photograph the existing caster with a tape measure visible for scale, note any part numbers stamped on the yoke or wheel, and email info@casterhq.com. We’ll match to the equivalent CasterHQ HD plate caster part. Common cross-references: Hamilton High-Heat, Albion HT, Caster Concepts heat-rated, Faultless TP/NP series, and the OEM specs on Powder-X paint booth equipment, Reliable Caster heat-rated, and similar HD high-temp manufacturer parts.
Stock high-temp plate casters ship same day from Mansfield, TX before 3 pm Central. Heavier 6″ and 8″ phenolic variants ship UPS Ground individually or LTL freight on fleet quantities. For oven and paint booth equipment cross-reference, expect one business day engineer response.
