Does the choice of caster material affect its lifespan in low-temperature environments?

The choice of caster material directly and significantly affects its lifespan in low-temperature environments. The core reason is that different materials vary significantly in their tolerance to low temperatures and the stability of their physical properties. Low temperatures alter key properties such as elasticity, hardness, and crack resistance. Suitable materials can function stably for a long time, while unsuitable materials will quickly fail. The specific mechanisms and differences are as follows:

1. The material's low-temperature tolerance determines the "basic lifespan threshold."
Different core materials (rubber, polyurethane, nylon, etc.) have different upper limits for low-temperature tolerance. Exceeding this threshold causes irreversible material damage, directly shortening the lifespan:

Ordinary rubber (natural rubber, styrene-butadiene rubber): At low temperatures (<-10°C), it quickly hardens and becomes brittle, completely losing its elasticity. The wheel tread is prone to cracking and chipping due to bumps during rolling. Short-term use (1-2 weeks) can lead to wheel damage.

Under load, brittle cracking can even lead to structural failure, resulting in a lifespan of only 1/5 to 1/10 that of a caster at room temperature. Low-temperature-resistant rubber (silicone rubber, modified EPDM): maintains elasticity at temperatures between -40°C and -60°C. Its molecular structure is stable at low temperatures and resists brittleness. Within the acceptable low-temperature range, the wheel tread has no risk of cracking or deformation, and its service life is roughly the same as at room temperature (for example, a silicone rubber caster stored in a -50°C cold storage can last 1-2 years, approaching the lifespan of normal-temperature operation).

Polyurethane: Its low-temperature resistance lies between that of ordinary rubber and low-temperature-resistant rubber (conventional models are resistant to approximately -20°C). At temperatures below -20°C, it hardens, losing elasticity but resisting brittle cracking. Increased rolling resistance leads to accelerated wheel tread wear, resulting in a service life of approximately 1/2 to 1/3 that of normal temperature operation.

Choosing low-temperature-resistant modified polyurethane (resistant to -40°C) can increase the service life to approximately 3/4 of that at room temperature. Rigid materials (nylon, cast iron): While they won't become brittle at low temperatures (nylon's low-temperature resistance is approximately -40°C), their lack of elasticity allows vibrations to be directly transmitted, exacerbating wear on the bearings and wheel core, indirectly shortening the overall lifespan (for example, at -30°C, the bearings of a nylon wheel will wear due to vibration, shortening their lifespan by 1/3 compared to normal temperature).

2. Material performance stability at low temperatures affects actual service life.
Even if the material hasn't reached the brittle fracture threshold, performance degradation at low temperatures can shorten its lifespan through indirect wear.

Ordinary rubber doesn't completely brittle at -10°C to -20°C, but its reduced elasticity leads to ineffective shock absorption. Equipment jolting can subject the caster bracket and bearings to greater impact forces. Long-term use can cause bracket deformation and bearing seizure, ultimately rendering the entire caster useless (rather than damage to the wheel tread alone).

Poor-quality polyurethane shrinks at low temperatures, reducing the fit between the wheel tread and the core. This can cause slippage and deviation during rolling, exacerbating localized wear on the wheel tread (for example, the edge wears 2-3 times faster than the center), and ultimately requiring premature replacement due to uneven wheel tread thickness.

3. Conclusion: Choosing the right material is key to extending caster life in low-temperature environments.
If the ambient temperature is **≥-20°C** (mildly cold, such as indoor locations in northern winter or cold storage buffer zones): Prefer low-temperature-resistant polyurethane or EPDM rubber casters to prevent material embrittlement and extend their lifespan to at least half that of normal temperatures.

If the ambient temperature is **-20°C to -60°C** (moderate to extremely cold, such as deep freezers or freezing outdoor environments): Silicone rubber or modified low-temperature-resistant rubber casters are essential to ensure material stability and a lifespan close to that of normal temperatures.

If inappropriate materials such as ordinary rubber or conventional nylon are used, not only will the lifespan be significantly shortened (typically within 1-3 months), but material cracking and wear may also lead to safety hazards such as equipment tipping and jamming, increasing replacement costs.

In addition, you need to pay attention to the material matching - even if the core material is resistant to low temperatures, if the bearing grease is ordinary (solidifies at low temperatures) and the wheel core is ordinary plastic (brittle and cracked at low temperatures), it will indirectly shorten the lifespan. You need to choose a complete set of casters with "low temperature resistant materials + low temperature adapter accessories".