Is there a castor industry to high price

Universal wheel, adjust the foot manufacturers the innovation of the modern enterprise development cannot leave the train of thought and the management pattern of innovation, more and more innovative enterprises entered the life, lead me in a new place, such as Microsoft, alibaba, baidu, and jobs of the apple empire, etc. , have sprung up in the modern economy, innovation for an enterprise, even a how profound social changes brought by the state. Innovative nature will leave footsteps in the castor industry. Is the earliest time castor extensive pattern, you want to trade quantity and the size of the enterprise, the enterprise into a certain stage after nature will also meet development bottleneck, how to break the bottleneck, naturally want to rely on innovation after the castor industry ushered in the new round of brilliance, their style, purpose, material, size and the additional function all had the new change, gradually with the development of a single to multiple, bring enterprises is not only the increase of profit, but also promoted the growth of industrial productivity. Can carry much weight, how to calculate the casters specifications of bearing light castor, medium casters, heavy-duty casters, super-heavy castor, track, wheel casters. Light-duty castor can load 16 kg to 160 kg medium castor can load 100 ~ 300 kg heavy PU castor castor super-heavy castor can carry 160 kg to 650 kg for the load of 270 kg to 800 kg track, castor for load 1500 kg to 5000 kg. How to test the trundle bearing the weight of a 6 inch diameter nylon wheel. Make it not broken.