1. From the appearance of the bracket of the heavy-duty caster, the steel plate bracket of the caster has a beautiful surface, no burrs, and the thickness must be uniform, thereby ensuring the quality of the load;
2. The bracket of heavy-duty casters is galvanized: In order to prevent rust, the galvanizing process is generally used. The galvanization of the caster bracket should be uniform and shiny;
3. Welding of heavy-duty caster brackets: the welding of steel plates should be smooth, and there should be no leakage welding, leakage points, etc .;
4. The size of wheels commonly used in heavy duty casters;
5. Check the appearance of heavy-duty casters: smooth surface, no bumps, uniform color, no obvious color difference;
6. Check the overall effect of the universal wheel: When the top plate rotates, each steel ball should be able to contact the steel plate turning surface, the force should be uniform, the rotation is flexible, and there is no obvious pause
7. Check the bearing quality of heavy-duty casters: there should be no obvious jumping phenomenon when the heavy-duty casters rotate;
