How to choose silent casters?

Key Points for Selecting Silent Casters:

Preferred Elastic Materials:

Polyurethane (PU): The best choice, offering excellent elasticity, low noise, wear resistance, and floor protection (ceramic tile/wood flooring). Suitable for office chairs, home furniture, and medical carts.

Ebony Rubber (Shore Hardness 70-80A): Low noise, low-temperature resistance, and moisture resistance, superior to soft rubber (which easily picks up dust and gets stuck). Avoid high-hardness plastics such as polypropylene (PP) and nylon (PA), as well as metal wheels (which are noisy and can damage floors).

Key Structural Design:

Wheel Diameter: 2 inches or larger is preferred. Larger wheels offer smoother rolling and reduce impact noise.

Bearings: A key silent component. Precision ball bearings are preferred (for smooth and low noise, such as office chairs), followed by needle bearings (for greater load-bearing capacity). Avoid designs without bearings.

Wheel Body and Bracket: A one-piece molded wheel body reduces friction noise; the bracket should have an anti-scratch coating or rubber cushioning to mitigate impact noise.

Suitable Use Cases:

Office/Home (Ceramic Tiles/Wooden Floors/Carpets): PU Wheels (2-3 inches) with Double Ball Bearings, Single Wheel Capacity 30-60 kg.

Medical (Smooth Tiles): Hard Rubber/Medical PU Wheels (2.5-3 inches) with Sealed Bearings, Single Wheel Capacity 50-80 kg.

Industrial Light Duty (Cement/Epoxy Floors): Modified TPU Wheels (3-4 inches) with Needle Bearings, Single Wheel Capacity 80-150 kg.

Verification and Pitfall Avoidance:

Test: Drive the vehicle in the field and listen for any harsh noises (rustling, clicking, or grinding). There should only be a smooth, even rolling sound.

Pitfall Avoidance: Be wary of overly soft materials (<60A, prone to deformation and increased noise) and low-quality bearings (quiet initially, but noisy later).

In summary: When choosing a silent caster, the key factors are a resilient material (PU/hard rubber), a precision bearing (ball bearing preferred), and a moderately large wheel diameter (2 inches or larger). This selection should be carefully considered based on the specific usage scenario (surface, load, and frequency). Field testing and careful attention to bearing quality are crucial to avoid "pseudo-silent" designs.