Match caster design to the real job. The best choice balances heat, load, floor type, and cleaning methods. Strong autoclavable wheels and well-built rigs maintain performance during tough sterilization cycles.
Maximum Temperature Capacity
Temperature rating shows the highest heat a caster can handle. In an autoclave, wheels see both heat and steam under pressure. Some plastics soften when hot, and some greases thin out. Review the full temperature range on the spec sheet before buying.
Exceeding the rating shortens life and cuts load capacity. That can lead to wheel failure or rough movement. For safety, confirm ratings with the manufacturer and follow your facility standards. A quick check now prevents costly downtime later.
Load-Bearing Capacity
Load-bearing capacity is the weight the wheel can safely support. It depends on wheel material, bearing type, and rig strength. Larger diameters often carry more weight and roll easier over joints or grates. Heat can weaken some materials, so choose a wheel that keeps its capacity at operating temperature.
To size your set:
- Add the total equipment weight plus payload.
- Divide by the number of casters that carry the load.
- Add a safety margin for uneven floors or dynamic forces.
For example, a 600 lb cart on four casters often uses three for support at any moment. Size capacity based on three casters, not four, to stay safe.
Durability and Longevity
Heat and chemicals can wear parts fast. Durable choices, like phenolic wheels or high-grade polyurethane, handle repeated stress. Look for sealed bearings, heat-rated lubricants, and corrosion-resistant rigs. These features extend service life after many autoclave runs.
Since 1977, Caster City has built products for heavy daily use. The right design reduces maintenance and downtime. It also keeps motion smooth when the cart is fully loaded.
Chemical Resistance
High-temperature areas often use harsh cleaners and disinfectants. Chemical resistance protects surfaces and bearings from swelling, cracking, or rust. Stainless steel, selected plastics, and certain rubbers resist many common agents.
Check the cleaners used in your facility. Match materials to those chemicals. A closed wheel hub can help block liquids from entering the bearing cavity. Better sealing improves life and reduces noise over time.