10Pcs R8 RS Ball Bearings, Rubber Sealed Deep Groove Ball Bearings 1/2" x1-1/8 x5/16, Double Shielded Bearings for Wheelchair Casters, Electric Motors, Skateboard Wheels, Grinder

["【Precision R8 RS Ball Bearings with Dual Size Markings】These deep groove ball bearings feature both inch (1/2\" x 1-1/8\" x 5/16\") and metric (12.7mm x 28.575mm x 7.938mm) dimensions clearly marked for easy identification. The precision-engineered R8 RS design ensures smooth rotation and consistent performance across all your mechanical projects.","【Rubber Sealed on Both Sides for Maximum Protection】Equipped with durable rubber seals on both sides, these bearings keep lubricant securely inside while blocking dust, dirt, and moisture from entering. This double-shielded design extends bearing life and reduces maintenance—ideal for outdoor equipment, garage tools, and workshop machinery.","【Deep Groove Geometry for High-Speed & Radial Load Support】The deep groove raceway design allows these bearings to handle both radial and axial loads while maintaining stability at high speeds. Experience quieter operation and reduced vibration in applications like electric motors, skateboard wheels, and power tools.","【Versatile Replacement Bearings for Multiple Applications】Perfect for wheelchair front caster forks, 2x72 belt grinders, lawn mower wheels, and electric motor repairs. Whether you're a DIY enthusiast repairing equipment or a workshop professional maintaining machinery, these R8 bearings deliver reliable performance.","【10-Pack Value with Consistent Quality】Each pack includes 10 identical R8 RS ball bearings, ensuring you have spares for multiple projects or replacements. Manufactured to strict tolerances for consistent fit and smooth rotation. If you have any questions about sizing or installation, our technical support team is ready to help."]