This pack contains 10 pieces of R168ZZ double shielded miniature ball bearings, sized 6.35 x 9.525 x 3.175 mm. These bearings are suitable for compact, precision applications and are commonly used in small motors and joint assemblies where smooth rotation and reliable performance are required. Benefits and features Compact, lightweight design for space constrained projects Double shielding (ZZ) provides protection from dust and retains lubrication to extend service life Standard R168ZZ size ensures easy replacement and broad availability Low friction performance supports efficient operation in small motors and mechanisms Pack of 10 pieces for convenient stocking and multiple project use Key attributes Model: R168ZZ Bore x Outer Diameter x Width: 6.35 x 9.525 x 3.175 mm Shielding: Double Shielded (ZZ) Type: Motor miniature ball bearing Quantity: 10 pieces Applications and use cases Replacement bearings in micro motors, small gearboxes, and other compact drive systems that require a 6.35 mm bore Pivot points and joint assemblies in light robotics, including spherical rod end style configurations and other small linkage mechanisms DIY projects and hobby implementations such as mini CNC components, 3D printer assemblies, or RC hobby gear assemblies where precise, durable bearings are needed Installation and compatibility notes Verify bore size to ensure a proper fit with 6.35 mm shafts or components Suitable for applications where protection from dust and contaminants is beneficial due to the double shielded design Consider standard maintenance practices for miniature ball bearings, including periodic inspection and appropriate lubrication per application requirements This description reflects the listed model, dimensions, shielding, and packaging (R168ZZ, 6.35 x 9.525 x 3.175 mm, double shielded, 10 pieces) and presents practical use cases and benefits for professional and hobby projects.