Brass caster capacity cannot be determined by material or wheel diameter alone. Two casters with a similar appearance may support very different loads because their wheel structure, stem diameter, mounting method and internal axle design differ. Buyers should therefore confirm the rated capacity of the complete caster assembly instead of estimating performance from the brass body.

What Determines Brass Caster Load Capacity?

The stated brass caster load capacity normally refers to the maximum load that one caster can carry under defined test conditions. Actual performance is influenced by several components:

• Wheel diameter and width

• Brass body thickness

• Stem or mounting-plate dimensions

• Axle material and diameter

• Bearing structure

• Wheel tread material

• Furniture frame strength

• Floor condition and movement frequency

Solid brass provides good strength, corrosion resistance and a premium appearance, but the caster is only as reliable as its weakest connection. A strong wheel body cannot compensate for an undersized stem, loose mounting point or weak furniture leg.

Calculating the Required Capacity

The furniture weight and expected contents should be added together before selecting solid Brass Casters. The total should then be divided by the number of casters that are expected to carry the load.

For a four-caster cabinet weighing 80 kg when fully loaded, dividing by four gives 20 kg per caster. However, floors are rarely perfectly level, and one caster may temporarily lose contact. A safer calculation assumes that only three casters are sharing the weight.

Recommended capacity per caster:

Total loaded weight ÷ number of load-bearing casters × safety factor

A reasonable safety factor should account for uneven flooring, impact during movement and possible overloading. The final factor depends on the application and should be agreed upon with the supplier.

Static Load Versus Moving Load

Static capacity describes the load supported while the furniture remains stationary. Dynamic capacity applies while the caster is rolling. Movement creates extra force when the wheel crosses gaps, thresholds or uneven flooring, so dynamic capacity may be lower than the static rating.

Furniture that is moved only during cleaning has different requirements from a service cart used throughout the day. Procurement specifications should state the movement frequency, floor type, travel distance and presence of thresholds.

Why Mounting Method Matters

Cup-shaped casters distribute force around the furniture leg and are commonly used for traditional furniture. Stem casters rely on the connection between the stem and the prepared mounting hole. Both types require compatible furniture construction.

Screw dimensions, insertion depth and leg material should be reviewed before approval. A caster may pass a load test independently but still fail after installation if the wooden leg splits or the mounting hole becomes enlarged.

Information to Send the Supplier

A useful request should include total loaded weight, caster quantity, furniture-leg dimensions, mounting details, floor conditions and expected movement frequency. Photos or drawings of the installation position help identify clearance and structural concerns.

When evaluating a heavy duty caster supplier, buyers should request the rated static and dynamic loads separately, along with test conditions and mounting requirements. HUZHAN recommends testing assembled furniture rather than relying exclusively on an individual caster rating.

The correct caster is selected through load calculation, installation testing and realistic operating conditions. These checks reduce rolling problems, structural damage and premature loosening after delivery.