If we were to ask 10 different people how they would qualify heavy duty caster wheels, we would receive 10 different answers. All the answers would be relative to that persons experiences and environment. Someone who works in an office may think that the casters under a large copier are heavy duty, while a laborer in a production facility would regard the casters on a large trash gondola as heavy duty caster wheels.
All industrial casters are generally regarded as heavy duty casters, but within their own category, industrial casters may also be classified by duty. There are what may be considered standard duty, medium duty and heavy duty caster wheels, specifically within industrial casters. The difference between the duty rating is determined primarily by maximum weight capacities, but also includes factors like durability and construction.