1. Clarity of the Bearing's Outer Packaging: Generally, original brand manufacturers have their own professional designers to create the outer packaging, and arrange factories with standardized production processes for manufacturing. Therefore, the packaging, from lines to patterns, is clear and unambiguous.

2. Clarity of the Anti-Counterfeiting Mark: The bearing body will be printed with the brand name and logo. The font size is small, but most products produced by formal factories use steel stamping technology, which is applied before heat treatment. Thus, although the font is small, it is deeply embossed and very clear. The font on counterfeit products is not only blurred, but also shallowly printed on the surface due to rough printing processes; some can even be easily wiped off by hand.

3. Presence of Noise: Hold the main sleeve of the bearing with your left hand, then rotate the outer ring with your right hand and listen for noise. Most counterfeit products are produced in backward conditions with manual workshop operations, so impurities like gravel will inevitably be mixed in and hidden inside the bearing during production, resulting in noise when rotating. This is a major difference from authentic brand bearings that strictly comply with product standards and are manufactured on professional equipment.

4. Presence of Oil Stains on the Surface: Special attention should be paid when purchasing bearings. Due to the current underdeveloped anti-rust technology in some regions, after anti-rust treatment, relatively thick oil stains are easily left on the bearing body, and the touch feels sticky. Bearings produced with advanced technology basically have no visible traces of anti-rust agents. However, careful professionals note that such bearings have a slight special odor, which comes from the anti-rust agent but is not visible.

5. Symmetry of the Fillets: Simply put, fillets are the intersections of horizontal and vertical surfaces. Due to limitations in production technology, counterfeit bearings cannot properly handle this part, resulting in asymmetric fillets.