Are all four wheels of supermarket trolleys universal wheels?

The universal wheel is the so-called movable caster, and its structure allows horizontal 360-degree rotation. Casters are a general term, including movable casters and fixed casters. The fixed caster has no rotating structure, so it can't rotate horizontally, but only vertically. These two casters are generally used together. For example, the structure of the car is two fixed wheels in the front and two movable universal wheels near the armrest at the back.

Universal wheel means that the bracket installed on casters can horizontally rotate 360 degrees under dynamic load or static load.

There are many kinds of materials for making universal wheels, the most common ones are nylon, polyurethane, rubber, cast iron and other materials. Widely used in mines, mechanical equipment, electronic equipment, medical equipment, engineering decoration, textiles, printing and dyeing, furniture, logistics equipment, warehousing, turnover vehicles, cabinets, equipment, electromechanical, dust-free workshops, production lines, large supermarkets and many other industries and fields.

According to different uses, bearings are divided into iron core, aluminum core and plastic core, with sizes ranging from 1 inch to 8 inches. Among them, iron core and aluminum core are generally heavy load-bearing wheels, and braking devices are often installed when they are used.