Castor is a generic term, including activities and fixed casters casters. Activity is what we call universal wheel casters, its structure allows for 360 degree rotation fixed casters also known as directional casters, it has no rotating structure, can't move. Usually two castors in General is with the use of, such as the structure of the cart is in front of two directional wheels, near the drive is two Hooke′s joints of the arm in the back round.

Now trundle bearings to introduce the casters of the structure.

1. installation height

The vertical distance from the ground to the installation location, with casters caster installation height is the bottom plate and wheel remote maximum vertical distance.

2. supports turning Center

Center rivet vertical lines horizontal distance to the hub center.

3. turning radius

Center rivet vertical lines horizontal distance to the outer edge of the tyre, proper spacing so that casters for 360-degree turn. Turning radius is reasonable or not directly affects the life of castors.

4. load

Casters when moving the load-carrying capacity, also known as dynamic wheel load varies because of factory tests in different ways, but also because of the material of the wheel varies, the key is whether the scaffold structure and quality can impact and shock resistance.

5. shock loads

When a device is bearing moment of impact or vibration when Castor load capacity. Static static static load load load static load: casters at rest can bear the weight. The static load should generally exercise load (load) 5~6 times the impact loading of static load should be at least twice.

6. turn

Rigid and narrow wheel than the soft, wide wheels to turn more easily. Turning radius is an important parameter in the wheels and short turning radius will increase steering difficulty, too much can cause the wheel shaking and shortened life expectancy.

7. the flexibility

Effect 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 quality, and narrow of round than flat side soft quality of wheels effort, but in uneven of ground Shang soft quality of wheels effort, but in uneven of ground Shang soft quality of wheels can better to protection equipment and shock absorbers!