Choosing industrial casters without picking the right tread material will lead to endless troubles down the line. Having supplied casters to all types of factories over the years, I have seen countless failed applications. Some treads wore through in less than three months after purchase; others left deep scratches on floors; a few even cracked completely under special working conditions. Today I will break down all common caster tread materials one by one.

Polyurethane (PU) treads are by far the most widely used option for industrial applications. They offer a broad hardness range from Shore A 65 to Shore D 75, excellent elasticity, great floor protection and relatively low rolling noise. They roll smoothly and deliver medium-to-high load capacity. The only caveat is high-temperature environments: PU performance deteriorates drastically above 80°C and fails almost completely beyond 120°C. Therefore, PU is not the primary choice for workshops with hot working surfaces.

Nylon treads stand out for extreme hardness. They boast heavy load capacity, excellent resistance to oils and chemicals, and low cost, making them prevalent in food processing and chemical plants. Their drawbacks are equally obvious: loud rolling noise and poor floor compatibility. Nylon wheels will leave permanent marks when rolled over epoxy floors. Additionally, nylon absorbs moisture and swells in humid surroundings, compromising dimensional accuracy — this factor must be considered during material selection.

Rubber treads deliver superior elasticity with outstanding shock absorption and noise reduction, alongside reliable floor protection. However, rubber is vulnerable to oils; contact with machine oil or hydraulic fluid causes swelling and softening, sharply reducing load-bearing performance. Rubber treads are only suitable for light and medium loads on clean floors, such as hospitals, hotels and offices. Avoid rubber wheels for heavy-duty or oily working environments.

Cast iron treads are engineered exclusively for extreme heavy loads. They feature ultra-high load capacity, excellent heat resistance and full oil resistance, capable of withstanding nearly all harsh working conditions. Their downsides include heavy weight, laborious pushing, loud noise and severe floor abrasion. They are typically deployed in steel mills and heavy machinery workshops with rugged, durable flooring.

Thermoplastic Rubber (TPR) has grown popular in recent years. It combines rubber-like elasticity with easy plastic processing, costs less than natural rubber, and offers decent wear resistance. It is widely applied on light-duty trolleys and tool carts. That said, TPR cannot withstand high temperatures; use above 60°C is not recommended, and its limited load capacity rules it out for heavy-load scenarios.

Phenolic resin treads remain unfamiliar to many buyers. They excel at high-temperature resistance, tolerating temperatures over 200°C, and provide good electrical insulation, so they are adopted in electronics factories and heat treatment workshops. Their major flaw is high brittleness: impact loads or collisions will easily chip and crack the tread surface.

Selecting the proper tread material is essentially a process of elimination — rule out unsuitable options first. List out your operating conditions: presence of high heat or oil spills, floor material, load weight, and noise limits. The right material will quickly emerge after screening these criteria. Do not expect a single material to fit every scenario; industrial caster selection demands tailored solutions. Manufacturers like Zhuoye Manganese Steel Casters develop segmented tread formulas for distinct working conditions, and their material recommendations can serve as a valuable reference during your selection process.