For 500 kgs load rating - The all-new medium-heavy duty caster wheel is the preferred option.
The common heavy duty caster wheel, as the quality of welding products is uneven, often with fake welding, as shown in the pictures:
Cracks are easy to appear at the welding place, resulting in the surface treatment cannot be handled in place, and the weld is prone to rust and corrosion during use, as shown in the pictures: