Castor wheel

Choosing the right material is critical for both floor protection and mobility. For hard floors (concrete or tile), select Polyurethane (PU) or Rubber wheels to provide noise reduction and grip. For soft floors (carpeting), Hard Nylon or Polypropylene wheels are preferred as they offer lower rolling resistance. In high-temperature environments like bakeries, Phenolic or Heat-Resistant Nylon is essential to prevent melting.

Never divide the total load by four. To ensure a safety margin, divide the total weight of the equipment plus the maximum load by three (Total Load / 3). This accounts for uneven floors where one wheel may momentarily leave the ground, shifting the entire weight onto the remaining three castors. Ensure the dynamic load rating meets your operational needs, not just the static rating.

Focus on the thickness of the steel plate (typically 5mm to 10mm for heavy-duty) and the swivel head construction. Look for double ball race swivel heads to ensure smooth rotation under heavy loads. For corrosive environments, specify 304 Stainless Steel or Zinc-plated finishes with a salt spray test rating of at least 48-72 hours to prevent premature rusting.

For the European market, ensure products meet EN 12526 to EN 12533 standards, which define testing methods for castor wheels. For North America, look for ICWM (Institute of Caster and Wheel Manufacturers) conformity. If the wheels are used in medical environments, they must comply with ISO 22881 and potentially RoHS/REACH if specific chemical restrictions apply to the plastic components.

Request a Third-Party Inspection Report (such as SGS or TUV) specifically focusing on load-bearing tests and salt spray tests. On Made-in-China.com, prioritize Audited Suppliers who have undergone comprehensive on-site verification. You should also request a video of a 'drop test' and 'rolling durability test' from the manufacturer's lab before balance payment.

The primary risk is moisture damage (oxidation) and packaging failure due to high weight density. Insist on VCI (Volatile Corrosion Inhibitor) bags for sea freight to prevent rust. Ensure the supplier uses reinforced wooden crates or heavy-duty double-corrugated cartons with palletization, as standard boxes often collapse under the concentrated weight of steel castors.

Castor production is highly automated; therefore, MOQs are usually higher (500-1000 units) for custom colors or specific stem sizes. To lower costs, try to standardize your requirements to the supplier's existing molds. For bulk orders, negotiate a tiered pricing structure where a 10-15% discount is applied when moving from LCL (Less than Container Load) to a Full 20ft Container (FCL).

Always use Secured Trading Services provided by platforms like Made-in-China.com to ensure your payment is held in escrow until shipping documents are verified. Avoid transferring funds to private bank accounts; ensure the beneficiary name matches the registered company name on the business license and the proforma invoice.