What is the standard for testing the degree of wear of caster wheel?

What is the standard for testing the degree of wear of caster wheel?

1.Testing purpose: To test whether the various caster wheel produced by the company meet the requirements and to ensure the quality of the products.

2.Test conditions:

2.1 Ambient temperature: No special environmental requirements, general indoor environment.
2.2 Tester: Multi-function caster wheel testing machine.
2.3 Height of walking obstacles: The diameter of the soft wheel is 3% of the diameter of the wheel, and there is no hard wheel. The obstacle and the wheel are walking at 45 degrees, and the two obstacles are placed alternately.
2.4 Test time: After a single round of injection molding, it is completely cooled, and the bracket is riveted to complete the finished product.
2.5 Tire surface hardness: PU (90a-100a), TPR (65a-80a), PP, PA (over 65d)

3.Test standard

According to the normal production of random sampling products of 1.2 times the weight of the normal load 3.1, continue to walk for 4 hours; according to the incoming inspection of the 1.2 times the weight of the conventional load, continue to walk for 8 hours, there is no spalling and local cracks and excessively worn tires ; Each part has been damaged and affected by the permanent deformation of the caster. The bearing (normal setting, no rotation) and loose blocking phenomenon are qualified.