What are the advantages and disadvantages of metal casters?

Metal Casters: Core Characteristics and Applications

Metal casters (with a metal wheel or bracket) are known for their high strength and wear resistance, making them suitable for specific scenarios, but they do have significant limitations.

Key Advantages:

Extremely Strong Load-Bearing and Impact Resistance: Metal (such as cast iron, cast steel, and stainless steel) boasts high structural strength, with a single wheel capable of bearing loads of 500kg to 5000kg, capable of withstanding the movement and impact of heavy equipment (industrial machine tools and construction machinery).

Excellent Wear and Environmental Resistance: High-hardness metal wheels wear slowly on rough surfaces (gravel and concrete), resulting in a long lifespan (5-10 years). They are resistant to high and low temperatures (-50°C to 300°C), oil, acid, and alkali, making them suitable for extreme environments such as outdoor use, cold storage, and the chemical industry.

Stable and Low-Maintenance Structure: The metal bracket features a secure connection, eliminating the risk of debonding or cracking; the metal bearings are lubricated for low maintenance.

Main Disadvantages:

Poor User Experience: The hard metal contact with the ground produces high noise levels (>60 decibels) and can easily damage smooth surfaces (wooden floors, marble), causing scratches or dents.

Heavy Weight and Difficulty Pushing: The high density of metal makes casters heavy (especially large ones), resulting in high pushing resistance.

Cost and Rust Prevention: Cast iron wheels require surface treatment to prevent rust. Stainless steel wheels offer excellent rust resistance but are more expensive (2-3 times more expensive than cast iron wheels). The overall cost is significantly higher than PU/rubber casters.

Lack of Cushioning and Vibration: Due to their lack of elasticity, ground vibrations are directly transmitted to the equipment, potentially damaging delicate components or items.

Applicability and Alternatives:

Suitable Applications: Heavy industrial equipment (material trucks, forklifts), extreme environments (high-temperature/chemical workshops, outdoor environments), and heavy-load transportation on rough surfaces (mines, warehouse racks).

Alternative Recommendations: For quiet environments or those requiring floor protection, such as homes, offices, and hospitals, avoid pure metal casters. Opt for composite casters with a "metal bracket + PU/rubber-coated wheel" to balance load-bearing capacity with quietness and floor protection.

Summary: Metal casters are essential for heavy-duty, extreme, and rough environments. Their advantages include load-bearing capacity, wear resistance, and weather resistance. However, drawbacks such as high noise, floor damage, and heaviness make them completely unsuitable for civilian applications. Choose based on your needs: Metal casters are used for heavy-duty industrial applications, while composite casters are preferred for civilian applications.