Are caster brakes affected by low temperatures?

Low temperatures (especially below -10°C) can severely impact the reliability, operability, and braking performance of caster brakes, potentially leading to failure. Key mechanisms include material embrittlement and hardening (such as rubber hardening, plastic embrittlement, and reduced metal toughness), lubricant solidification or failure, moisture freezing, and misalignment caused by thermal expansion and contraction.

Key brake components face significant risks at low temperatures: brake pads (commonly made of rubber or polyurethane) experience reduced friction and are prone to cracking; brake levers and pedals may become brittle, break, or deform; spring rebound force may weaken or even become stuck; bushings may become stuck due to lubricant solidification or contraction; and locking mechanisms are prone to seizure or cracking.

To improve low-temperature adaptability, optimization efforts can be made in three areas:

Material Upgrade: Select low-temperature-resistant materials, such as EPDM rubber or special PU brake pads, reinforced nylon or stainless steel brake levers, and low-temperature spring steel, along with silicone-based grease with a freezing point ≤ -40°C.

Structural Design: Add anti-icing seals and appropriately increase clearances to prevent seizure. In extreme environments, heating plates can be installed to prevent freezing.

Maintenance Standards: Regularly clean ice and replace low-temperature grease. Perform a pre-test before operation, and avoid sudden braking.

Typical applications, such as cold storage (-10°C to -30°C), require attention to sealing and low-temperature-resistant materials. For polar environments (below -30°C), self-lubricating components with heating are recommended. For low-temperature transportation, regular maintenance is recommended to accommodate temperature fluctuations.

In short, low-temperature caster brakes require a multi-faceted approach from selection, design, and maintenance, emphasizing low-temperature-resistant materials, specialized lubrication, and anti-icing features to ensure reliable braking and safe operation.