Custom High Temperature Casters
Standard caster wheels fail in sustained heat — not gradually, but catastrophically. Polyurethane treads soften and deform above 100°C. Commercial rubber compounds develop compression set, lose their bond to the hub, and eventually shear off entirely under load. If your operation involves industrial ovens, autoclaves, or composite curing systems, replacing wheels that fail mid-cycle is a recurring maintenance problem that high temp caster wheels built from the right material can eliminate.
Fenlora Groups manufactures custom silicone (VMQ) treaded wheels for sustained operating temperatures up to 230°C. Each wheel is built to order — material compound, hub configuration, durometer, and dimensions specified to your application — and ships DDP to the US from our factory in China.
Why Standard Wheels Fail in High-Heat Environments
The failure mode is almost always the same. Under continuous thermal load, the base polymer in standard polyurethane or commercial rubber wheels undergoes compression set — the material loses its ability to recover after deformation. Once that threshold is crossed, the tread softens, migrates, and separates from the hub. In autoclave or oven environments, this typically shows up as flat spotting under static load, then progressive tread separation.
Phenolic resin wheels can survive the heat, but they introduce a different problem: they are completely rigid. On epoxy-coated oven floors, rigid wheels gouge the surface. On carts carrying uncured composites or calibrated instruments, they transfer every vibration and floor shock directly to the payload.
Silicone resolves both failure modes. The material maintains structural integrity and load-bearing capacity well past 200°C, while its inherent elasticity continues to absorb vibration and protect floor coatings throughout the thermal cycle.
How Fenlora Builds High Temperature Caster Wheels
The starting point is compound selection. We use high-temperature VMQ silicone formulated for low compression set at elevated temperature — the property that determines whether a wheel recovers its shape after sitting under load in a hot oven. The compound is mixed and compression molded directly onto the hub, with press temperatures and cycle times controlled to achieve a reliable mechanical and chemical bond between tread and substrate.
After demolding, every batch goes through a mandatory post-cure cycle in our industrial ovens. This secondary heat treatment drives off residual volatiles from the curing agents — a step that matters most for vacuum environments and autoclaves where outgassing can contaminate the process or the product. It also stabilizes the compound’s long-term thermal properties.
Tooling is designed to control parting line placement and flash thickness. Both affect rolling smoothness. A poorly placed parting line creates a raised seam that introduces vibration on every wheel rotation. We design this out at the tooling stage rather than managing it in post-processing.
Technical Specifications
The values below represent our standard high-temperature silicone compound. Custom durometer, hub material, and dimensional specifications are available.
| Property | Value | Test Standard |
|---|---|---|
| Continuous Operating Temperature | Up to 230 Celsius | ASTM D1329 |
| Compression Set (22 hrs at 175 C) | Less than 15% | ASTM D395 Method B |
| Durometer (Hardness) | 70 to 85 Shore A | ASTM D2240 |
| Tensile Strength | 1200 psi | ASTM D412 |
| Recommended Application Conditions | Industrial baking, aerospace composite curing, medical autoclaves | N/A |
Note: Compression set and tensile figures reflect our standard VMQ compound. Confirm against your part-specific data sheet before use in safety-critical specifications.
Silicone vs. Polyurethane vs. Phenolic: Choosing the Right Tread
Silicone vs. Standard Polyurethane
Polyurethane is the default tread material for good reason — it handles abrasion well and carries heavy loads at room temperature. But its thermal ceiling is around 80–90°C for continuous use, and it degrades quickly above that. In an industrial oven or autoclave, polyurethane treads flat-spot under static load within a small number of cycles, then delaminate from the hub. Silicone operates continuously where polyurethane cannot.
Silicone vs. Phenolic Resin
Phenolic wheels handle extreme heat reliably and have been used in oven applications for decades. The trade-off is that they are fully rigid, loud on hard floors, and transfer vibration directly to the load. On epoxy oven floor coatings, phenolic wheels cause surface damage over time. For carts carrying uncured aerospace composites or sensitive instruments, that vibration transfer is a process risk. Silicone retains its damping properties at high temperature, protecting both the floor and the payload.
What to Include When You Request a Quote
To turn around an accurate quote quickly, it helps to have the following:
- Operating temperature — peak and continuous
- Load per wheel — static and dynamic if different
- Wheel dimensions — outer diameter, tread width, hub bore
- Hub material — steel, aluminum, or high-temp composite
- Application — oven rack, autoclave cart, curing frame, other
- Annual volume estimate — helps us recommend tooling approach
If you are replacing an existing wheel that has been failing, sending a sample or drawing accelerates the process considerably.
Lead Times and MOQs
We start at 100 units and offer rapid prototype tooling for fit checks and thermal cycle validation before full production. All orders ship DDP to the US — we handle customs clearance and import duties, so the price you receive is the landed cost.
Send your specifications via contact form to start a conversation with our engineering team.
Request a Quote and Prototype Tooling
Fenlora Groups supports your project from development to mass production, with low minimum order quantities starting at 100 units. We offer rapid prototype tooling to validate fit and function before committing to production molds. Contact us today to request a quote.