An introduction to the basics of custom wheel bearings with rubber coatings

1. What is custom wheel bearings with rubber coated
Custom wheel bearings with rubber coated refers to a non-standard bearing suitable for use under certain conditions, which is formed by injecting or bonding rubber products on the surface of the bearing through a casting mold.

2.the characteristics and materials of custom wheel bearings with rubber coated
Custom wheel bearings with rubber coated have excellent strength and wear resistance, excellent heat resistance, hydrolysis resistance, aging resistance, bright appearance, fine and smooth colloid surface, firm bonding between colloid material and shaft core, hardness range models, In addition, rubber-covered bearings have the advantages of shock load resistance and low noise compared with ordinary bearings.

Commonly used lagging materials are as follows:
1) Polyurethane rubber rollers have good chemical properties, good solvent resistance, anti-aging, tear resistance, and good resilience.
2) Silicone rubber-coated bearings have good heat resistance, cold resistance, ozone resistance and atmospheric aging, but their disadvantages are poor mechanical properties such as tensile strength and tear strength, and poor oil resistance and organic solvent resistance.
3) Polyacetal (POM) coated bearings have high mechanical strength and rigidity, high fatigue strength, good resistance to organic solvents, and stronger wear resistance than polyurethane. The disadvantages are poor acid resistance, large forming shrinkage, and long-term high temperature. Easy to decompose.
In addition, there are rubber-coated bearings made of rubber-coated materials such as nitrile rubber and fluororubber.

3.custom wheel bearings with rubber coated classification
Custom wheel bearings with rubber coated will have a variety of rubber coated bearings due to the rubber material, rubber shape, colloid color or bearing material, shape, and whether there is a bearing rod. For example:

Four, custom wheel bearings with rubber coated common problem analysis
1) The polyester bearing will turn yellow, is it a product quality problem?
Answer: Polyester coated bearings will become darker and yellower over time and under natural light or lighting. This is a normal phenomenon and will not affect its physical properties. To avoid such phenomena, it is best Avoid direct sunlight.
2) Polyester bearings will become sticky, what is the reason?
Answer: This is because polyacrylic ester is used in a humid environment for a long time, it will be hydrolyzed and deteriorated, and its internal structure will be destroyed. You can consider replacing it with a rubber-coated bearing made of silicone.
3) Is the hardness of polyamide coated bearings a fixed value? What is the relationship between hardness and friction?
Answer: The hardness tolerance of polyacryl rubber-coated bearings is generally about ±5°C Shore, and the friction force will decrease with the increase of hardness.

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