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, micro motor, provides high and uniform hardness. uxcell MR74-2RS Deep Groove Ball Bearing 4x7x2.5mm Double Sealed Chrome Steel Bearings 2-Pack: Industrial & Scientific. uxcell MR74-2RS Deep Groove Ball Bearing 4x7x2.5mm Double Sealed Chrome Steel Bearings 2-Pack: Industrial & Scientific. 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, small rotary motor, good wear resistance, and high contact fatigue performance.。Suitable for all kinds of industrial equipment, Ball Bearings are cost-effective and require little maintenance.。Chromium Steel (GCr15) made with heat treating. pre-lubricated, office equipment and so on.。 。 。Selecting Guide:。Shields (Designation Suffix Z/ZZ) - High speed. Protect from dirt and debris.。Sealed (Designation Suffix RS/2RS) - Made of sheet steel reinforced NBR (oil- and liquid-resistant). Lower limit speed than Shield Bearings.。 。 。Specification:。Model: MR74-2RS。Sealed Type: Double Sealed。Inner Race/Outer Race Meterial: Chrome Steel (GCr15)。Cage Material: Stamping Steel。Inner Diameter (d): 4mm。Outer Diameter (D): 7mm。Thickness (B): 2.5mm。Dynamic Load Rating (Cr): 0.252kN。Static Load Rating (Cor): 0.106kN。Accuracy Class: P0 (ABEC-1)。Noise Level: Z1。Number of Pack: 2 Pcs。 。 。 。.