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Installation height: vertical distance from the ground to the installation location, installation of castors with castors and floor height is the vertical distance and wheel remote maximum.

Bracket turn to center distance: refer to vertical center rivet line to the horizontal distance from the center hub.

Turning radius: refers to rivet a vertical line from the Center to the outer edge of the horizontal distances, proper spacing so that casters for 360-degree turn. Turning radius is reasonable or not is directly affects the life of castors.

Load: casters when moving the load-carrying capacity, also known as dynamic load wheel dynamic loads which differ from factory test method, which differs from the material of the wheel, hinges on whether the structure and quality of the support and resistant to shocks and vibration.

Shock load: when a device is bearing physical shocks or vibration castors of instantaneous load-carrying capacity. Static load static static static load capacity: casters at rest can bear the weight. Static load should generally exercise load (load) 5~6 times the static load should be at least twice times the shock load.

Steering: rigid and narrow wheel compared to the soft, wide wheel steering more easily. Turning radius is an important parameter of the wheels and short turning radius will increase steering difficulty, too much will cause the wheels swaying and shortened life expectancy.

Driving flexibility: effects casters driving flexibility of factors has bracket of structure and bracket steel of selection, and wheels of size, and wheels type, and bearing,, wheels more big driving flexibility more good, in smooth ground Shang hard mass, and narrow of round than flat side soft mass of wheels effort, but in uneven of ground Shang soft mass of wheels effort, but in uneven of ground Shang soft mass of wheels can better to protection equipment and shock absorbers!