1, casters must be installed in the location specified design manufacturers.
2, installation of the truckle bracket must have sufficient strength, to meet the use of bearing weight.
3, casters function cannot be changed, nor by the mounting device effects.
4, rotary motion axle must always vertical.
5, the caster wheels are fixed between the wheel must be in a straight line.
6, if use only swivel casters, they must be the same.
7, if the caster wheels are fixed with swivel casters casters use, so all must be compatible, and subject to the manufacturers recommend the use of.