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. Suitable for all kinds of industrial equipment, micro motor, small rotary motor, 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 nitrile butadiene rubber (oil- and liquid-resistant). Lower limit speed than Shield Bearings. Specification:Model: S6701ZZSeal Type: Double ShieldedInner Race/Outer Race Material: 440C Stainless Steel (9Cr18)Cage Material: 304 Stainless Steel (0Cr18Ni9)Inner Diameter (d): 12mmOuter Diameter (D): 18mmThickness (B): 4mmDynamic Load Rating (Cr): 835.2NStatic Load Rating (Cor): 478.8NLimiting Speed (Oil): 13500rpmAccuracy Class: P0 (ABEC1)Noise Level: Z2Number of Pack: 2 pcs