Product name: Heavy Duty Industrial Casters
Material: Iron+PU
Diameter: 65/75/100/125 mm
Loading capacity: 60-80kg
Application: Office Chair,furniture chair and Other Equipment
OEM/ODM: Provided OEM/OEM service according to your drawing.
How to choose casters:
The use of casters is to reduce labor intensity and improve work efficiency. Choose the right caster for your use according to the way, conditions and requirements of the application (convenience, effort, durability)
Load bearing:
Calculating load bearing: 
T=Singe caster load bearing
E=Transport vehicle weight
Z=Moving object weight
M=The effective load-bearing quantity of the wheels
The effective load-bearing quantity of the wheels as below showing:
When selecting the bearing capacity, the bearing capacity of the caster should be calculated according to the maximum support point. The specific force support point of the caster is as shown in the figure below, and P2 is the heaviest support point:
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