When selecting casters, how do you balance shock absorption and load-bearing capacity?

When selecting casters, balancing shock absorption and load-bearing capacity requires consideration of application requirements and optimization through material selection, structural design, and parameter matching. The core conflict between these two factors lies in the fact that load-bearing capacity relies on high-hardness materials or structures, while shock absorption requires elastic cushioning, which requires targeted resolution.

First, clarify application priorities: heavy-duty industrial equipment prioritizes load-bearing capacity, precision instruments prioritize shock absorption, and commercial equipment requires a balanced approach. Material selection is fundamental. High-strength polyurethane (PU) is a well-balanced choice, offering a load capacity of 500-1500kg/wheel and moderate elasticity. Cast iron/steel wheels offer extremely high load-bearing capacity (≥1000kg/wheel) but poor shock absorption, requiring the use of shock-absorbing brackets. Rubber and pneumatic wheels offer optimal shock absorption and are suitable for light-load, high-cushioning applications. High-density materials can enhance load-bearing capacity.

Structural design can address performance shortcomings: A composite wheel structure with a "hard core + elastic outer layer" ensures load-carrying performance, while the elastic layer provides cushioning. Dual wheel combinations or wide wheel treads distribute load and reduce vibration. Shock-absorbing brackets utilize springs and rubber washers to absorb vibration, while heavy-duty bearings reduce rotational friction.

Parameters must be scientifically matched: The load capacity of a single wheel is calculated as total weight divided by the number of wheels, with a safety factor of 1.2-1.5. Large-diameter wheels (≥100mm) facilitate navigating obstacles, improving shock absorption and load capacity. Wheel hardness can be adjusted based on requirements: Shore A values of 60-80 prioritize shock absorption, while values above 95 prioritize load capacity.

Finally, optimization is based on surface conditions and frequency of use: Wheel elasticity is preferred for smooth surfaces, while a larger diameter and shock-absorbing brackets are required for rough surfaces. For high-frequency movements, wear-resistant, high-load-bearing materials are selected, while for low-speed applications, a shock-absorbing structure is preferred.