Product overview A pack of 10 hybrid ceramic deep groove bearings, model S683 2RS, sized 3x7x3 mm with ABEC7 precision. These bearings use Si3N4 ceramic balls combined with metal races and feature a greaseless, rust proof design for low friction and consistent performance. Also referenced model S686C2OS 6x13x5 mm is provided for compatibility and alternative size needs. Key benefits precision: ABEC7 tolerance for smoother rotation and more consistent running at higher speeds. Low friction and responsiveness: Si3N4 ceramic balls reduce rolling resistance compared with conventional steel balls. Reduced maintenance: Greaseless design minimizes the need for relubrication in applications where light lubrication is preferred. Corrosion resistance: Rust proof ceramic balls improve performance in humid or wet environments. Compact and versatile: 3x7x3 mm footprint fits many small assemblies where space and smooth motion are critical. Durable hybrid construction: Ceramic balls with metal races balance longevity with load capacity suitable for small rotating components. Specifications Quantity: 10 pieces Primary model: S683 2RS Size: 3 x 7 x 3 mm (inner diameter x outer diameter x width) Precision rating: ABEC7 Ball material: Si3N4 ceramic Bearing type: Hybrid ceramic deep groove ball bearing Seal type: 2RS (double sealed); related variant referenced S686C2OS 6 x 13 x 5 mm Greaseless and rust proof as specified How this solves common problems Eliminates excess drag that causes loss of efficiency in small motors and reels. Lowers maintenance frequency in applications exposed to moisture or dirt by relying on ceramic ball benefits. Provides a compact, precision replacement where original bearings wear out or deliver inconsistent performance. Typical applications Fishing reels: Direct replacement in spinning and baitcasting reels to restore smooth retrieve and resist corrosion from water exposure. Small electric motors and gearboxes: Improves responsiveness and reduces heat from friction in hobby motors, servos, and micro gear systems. Precision hobby and instrumentation: Suitable for camera gimbals, RC models, turntables, and other compact devices requiring reliable, low friction rotation. Notes on selection Verify shaft and bore dimensions before installation to ensure correct fit for 3 x 7 x 3 mm bearings. The listing references the S686C2OS 6 x 13 x 5 mm size as an alternate model if a larger bearing is required. Seal type and greaseless construction affect maintenance and operating environment choices; choose the variant that matches your application conditions. Reliable replacement parts for compact, precision rotating assemblies where low friction and corrosion resistance matter.