Is there any difference between the universal wheel and castor

In fact, it is very simple. Castor castor is a general designation, including activities and fixed castor. Caster is the so-called universal wheel, its structure is allowed to rotate 360 degrees; Fixed castor no rotational structure, can't turn. This two kinds of casters are generally collocation with, such as the structure of the trolley is in front of two fixed wheel, behind near the armrest is driven by two wheels. / news_47。