Industrial Castor Load Capacity: What Buyers Should Calculate

Total Weight Is Only the Starting Point

Add equipment weight and maximum carried load. The result should not automatically be divided by every installed castor because floors and frames may distribute weight unevenly.

Use a Conservative Load-Bearing Count

For a four-castor platform, buyers often begin by considering the possibility that only three castors carry the load on an uneven floor. The working calculation is total loaded weight divided by the realistic load-bearing count, followed by an application safety allowance. The correct allowance depends on speed, impact and duty, so it is not one universal percentage.

Separate Static and Dynamic Conditions

A stationary frame, a manually pushed trolley and a powered or towed unit impose different demands. Starts, stops, turns, ramps and floor joints can create loads that are not visible in a simple static calculation.

Add Application Factors

Speed, impact, obstacles, towing, temperature and continuous operation affect the required capacity. Wheel material, diameter and bearing also influence heat and rolling resistance. Ask the manufacturer to review these conditions.

Check the Equipment Structure

The mounting plate, bolts, frame and welds must support the same forces as the selected castors. A high-capacity castor cannot compensate for a flexible or undersized mounting structure.

Send Data That Can Be Verified

Provide empty weight, maximum payload, castor layout, speed, floor, obstacles, operating hours, environment and quantity. The quotation should identify the selected model codes and rated load used for the recommendation.

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