I need design a trolley with four casters, the four casters are installed on the four corners of a 460mmX405mm metal plane. And the load will be a cubic 380mmX225mmX350mm (Height is 350mm), weight about 150Kg, site at the center of the metal plane.
The dimensions of the casters is as below:
You see the support point of the caster and the wheel are not on a vertical line, so I'm afraid when all four wheels in the same direction, the trolley will not be stable. So I go here for some suggestions(or some formulas are better), if the trolley can works stable? Or I must change my design, such as enlarge the metal plane?