Uxcell 4Pcs SMR74ZZ Deep Groove Ball Bearings, 4X7X2.5Mm 440C Double Sealed Bearing

Description:NOTE:Please refer to the picture and select the right type of bearing before your order (Sealed or Shield on BOTH sides of the bearing). The suffix on the bearing is just for differentiating between the Sealed and shielded types of bearing. It would not affect the use of our product. Double-sided Seal: This bearing has a double-sided shield, which effectively keeps lubricant in and prevents the entry of dust and moisture, thereby protecting the working parts of the bearing and extending its service life, maintaining optimal performance. Reduce Friction: The bearings are designed to reduce rotational friction and support radial and axial loads, enabling smooth and low-noise rotation of machinery or equipment. ZV3 Noise Level: Designed to minimize friction and vibration, this bearing has a ZV3 noise level, providing a quiet, noise-free working environment and improving user comfort. Wide Application: Widely used in various equipment and machinery with high-silence requirements, such as robotics, ship rudder shafts, micro motors, small rotary motors, 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: SMR74ZZ Seal Type: Double Sealed Noise Level: ZV3 Inner Race/Outer Race Material: 440C Stainless Steel (9Cr18) Cage Material: 440 Stainless Steel (9Cr18) Inner Diameter (d): 4mm Outer Diameter (D): 7mm Thickness (B): 2.5mm Accuracy Class: ABEC5 Number of Pack: 4 pcs x Deep Groove Ball Bearings