627ZZ Deep Groove Ball Bearing – Chrome steel construction with double metal shields (ZZ) for effective contamination protection and grease retention. 3.3 kN dynamic load, up to 32,000 RPM. Pre-lubricated and ready to install. Ideal for small electric motors, power tools, skate wheels, RC models, 3D printers, and precision instruments. Model: 627 ZZ Inner Diameter (d): 7 mm / 0.2756 in Outer Diameter (D): 22 mm / 0.8661 in Width (B): 7 mm / 0.2756 in Material: Chrome steel Operating Temperature: -40°C to +120°C Mass: Approx. 13 g (12.7 – 12.9 g)