608RS ABEC-9 Skateboard 608-Color Scooter Bearings 8x22x7 MM 10Pcs 608 V RS Surface Black PA66 Cage 608 Ball Bearing 608-2RS

 8x22x7mm ABEC-9 608 2RS Roller Skate Wheel Scooter Bearing Anti-rust Professional Skateboard Wheel Bearings Features:TN engineering plastic material, solid and durableABEC 9 wheel bearings, suitable for rollerblades skateboardSpecifications:Material: TN engineering plasticColor: Red/BlackQuantity: 10PCSWeight: 115gInner Diameter: 8mmOuter Diameter: 22mmThickness: 7mmPackage Contents：10PCS  x Wheel Bearings1. Why do the bearings I receive have shaking?The clearance of the bearing is related to the play.The default is the standard C0 clearance, which is usually 3-18um.The corresponding principle is shown in the figure below.If you don't need to shake, please choose C2 small clearance bearing,If you have any questions, please contact us before purchasing.2. Do I still need to add grease to the bearings?Grease does not need to be added extra Because the bearings are pre-filled with grease at the factory.You can refer to our Youtube video to learn about the production process.If you have special use requirements, please operate under the guidance of a professional.3. Why do stainless steel bearings can be sucked up with magnets?Standard bearings are made of chrome steel. For special environments, stainless steel bearings are used.Commonly used stainless steel materials are 440C, 420, 304, 316.Except that 316 is non-magnetic material, Other stainless steel materials will have weak magnetic,This is determined by the composition properties of the material itself.Please contact us for specific application guidance.