1. bearing outer packaging is clear
Under normal circumstances, SKF bearings factory brand has its own dedicated external packaging designed for designers and production plant for production of the conditional clearance arrangements, so Pack both from the line to the blocks of color are very clear, in no uncertain terms, some brands of accessories packaging also has unique design dedicated to the protection of intellectual property rights.
2. the bearing seal is clear
SKF bearing the brand on the bearing body, marking, etc. Font is very small, but being factory produced mostly using stamping technology, and not overheated before embossing, fonts are small, concave deep, crystal clear. Counterfeit products instead of fuzzy fonts, rough due to printing technology, fonts, floating on the surface, and some can even easily erased with his hand.
3. bearing bearing noise
Left hand hold the bearings with the body, right hand toggle coat makes it rotate, listen to their trash. As most of the production conditions of the counterfeit products fall behind, fully manual workshop operation, in the production process will inevitably be doped with impurities such as sand, hidden in the bearing body, so when rotated will issue a hybrid sound. This is to strictly enforce standards of production, are plant and machine operation between brands, a major difference.
4. the bearing surface of the cloudy oil
Buying bearings should pay special attention. SKF bearing special attentive connoisseur that smells a smell is definitely antirust oil under and just don't see it.
5. whether large inner bearing uniform
So-called bearing a chamfer, which is horizontal and vertical surfaces at the junction of counterfeit SKF bearings due to limitations in technology, in the fringes of the site dealing with unsatisfactory.
Product Model | Inside Diameter | Outside Diameter | Thickness |
30316U NTN | 80 | 170 | 39 |
33216U NTN | 80 | 140 | 46 |