The caster wheel is divided into directional caster wheel and non-directional wheel caster. Directional caster wheel allows 360 degrees rotation. non-directional wheel caster has no rotating structure and can’t rotation. In general, two casters are generally use collocation, such as the structure of the trolley is in front of two non-directional caster wheels, behind near the armrest is driven by two directional caster wheels.
Noticed:
1、To avoid overweight.
2、Do not bias.
3、Periodic maintenance( such as regular oil, check the screws properly)