uxcell Ball Bearing Guide Pulley Roller Round Wheel 8x30x8.5mm Double Metal Shielded (GCr15) Chrome Steel Bearings 4pcs

Note： Please refer to the picture and select right type of bearings before your order (Sealed or Shield on Both or Single side of the bearing). Suffix on the bearing just for differentiating between Sealed and Shield type of bearing. It would not affect the use of our product. Description: Single-row, pre-lubricated, normal accuracy. Deep Groove Ball Bearings are one of the most widely used rolling bearings. They are used to accommodate radial and axial loads in both directions. With small friction and high-limit speed, Ball Bearings are cost-effective and require little maintenance. Chromium Steel (GCr15) made with heat treating, provides high and uniform hardness, good wear resistance Suitable for all kinds of industrial equipment, micro motor, small rotary motor, office equipment and so on. Selection Guide: Shields (Designation Suffix Z/ZZ) - High speed. Protect from dirt and debris. Sealed (Designation Suffix RS/2RS) - Made of sheet steel reinforced nitrile butadiene rubber (oil- and liquid-resistant). Lower limit speed than Shield Bearings. Specification: Shielded Type: Double Shielded Inner Race/Outer Race Material: Chrome Steel (GCr15) / Nylon Cage Material: Stamping Steel Inner Diameter (d): 8mm Outer Diameter (D): 30mm Thickness (B): 8.5mm Accuracy Class: P0 (ABEC1) Noise Level: Z2 Number of Pack: 4Pcs