Whether the outer packaging is clear: In most cases, factory brands have their own dedicated designers who create the outer packaging. They also ensure that the production conditions of the factory are properly arranged to maintain consistency and quality. As a result, the packaging features clear lines, well-defined color blocks, and no ambiguity in design. Some imported brands also incorporate unique accessory designs to protect their intellectual property, making it even more difficult for counterfeiters to replicate.
Whether the steel printing is clear: Brand names, labels, and other information are typically printed directly onto the bearing body. The fonts used are usually very small, but factory-produced bearings often use stencil technology, where the text is pressed before heat treatment. This ensures that the font is not only small but also deep and highly legible. Counterfeit products, on the other hand, tend to have blurry or smudged printing. Their fonts are often shallow, sitting on the surface, and can even be wiped off with a finger.
Is there any noise? To check this, hold the inner race of the bearing with your left hand and rotate the outer race with your right hand. Listen carefully for any unusual noises. Most counterfeit bearings are produced without proper machinery and often involve manual processes, which can lead to impurities like sand being mixed into the bearing during manufacturing. These impurities cause noise when the bearing rotates. This is one of the key differences between genuine factory-produced bearings, which are made under strict standards using automated equipment, and fake ones.
Is there any oily residue on the surface? This is especially important when purchasing imported bearings. Due to less advanced rust prevention techniques in some domestic markets, bearings may be coated with thick oil that feels sticky when touched. In contrast, imported bearings typically have minimal or almost invisible anti-rust oil. Additionally, imported bearings often have a distinct smell that indicates the presence of anti-rust oil, even if it's not visible to the naked eye.
Whether the chamfer is uniform: The chamfer refers to the rounded edge where the horizontal and vertical surfaces meet on a bearing. Genuine bearings are manufactured with precision, resulting in smooth and consistent chamfers. However, counterfeit bearings often fail to achieve this due to limitations in their production methods, leading to uneven or rough edges that are easy to spot upon close inspection.
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