The universal wheel is the so-called movable caster, and its structure allows 360-degree rotation horizontally. Casters are a collective term, including movable casters and fixed casters. Fixed casters have no rotating structure and cannot rotate horizontally and can only rotate vertically. These two types of casters are generally used together. For example, the structure of a trolley has two fixed wheels at the front and two movable casters at the back near the push armrest.

Universal wheels refer to brackets installed on caster wheels that can rotate horizontally 360 degrees under dynamic or static loads.

There are many materials for manufacturing universal wheels, the most common materials are: nylon, polyurethane, rubber, cast iron and other materials. Widely used in mining, machinery and equipment, electronic equipment, medical equipment, engineering decoration, textiles, printing and dyeing, furniture, logistics equipment, warehousing, turnover vehicles, chassis, cabinets, equipment, electromechanical, dust-free workshops, production lines, large supermarkets and many more industries and various areas.

According to their different uses, bearings are divided into iron cores, aluminum cores, and plastic cores, with sizes ranging from 1 to 8 inches. Among them, iron cores and aluminum cores are generally heavy-duty load-bearing wheels, and they are often equipped with brakes when in use.