An article to understand polyurethane rubber bearings

1. What is a rubberized bearing?

In the case that the existing national standard bearings can not meet the demand, in order to achieve a certain application purpose, the bearing is covered with soft or hard rubber. Most of the hard rubber is engineering plastic nylon, polyoxymethylene, ABS, etc., and the soft rubber is mostly polyurethane PU.

2. the characteristics of polyurethane rubberized bearings

(1) Good moisture-proof, waterproof and frost-resistant performance;

(2) The cast polyurethane has strong deformation resistance, is not easy to crack, and has high viscosity;

(3) Good shock absorption and sound absorption, and can be used in strong vibration occasions;

(4) Good wear-resistant, oil-resistant and corrosion-resistant, and can be used in harsh environments;

(5) The outer diameter of the arc rubber bearing is finished by the arc surface, which reduces the contact area with the workpiece; The male thread type is easy to install and remove.

3. the category of polyurethane rubberized bearings

4. Precautions for the use of polyurethane rubberized bearings

(1) If the use occasion is in a high-humidity area, the temperature and humidity management of the warehouse and the use environment should be carried out to prolong the service life of the product;

(2) The size of polyurethane will change with the surrounding temperature, but the amount of change is not large, and it can be restored to the original size after a few hours at room temperature;

(3) The hardness tolerance is generally about 5° in the Shore ± is the normal value.