Hybrid Ceramic Reel Bearings — S687 2RS (7x14x5mm) + S698C2OS (8x19x6mm) Key benefits Smoother, more precise rotation: ABEC7rated precision and ceramic rolling elements reduce friction and vibration for consistent, quiet performance. Longer service life: ceramic balls combined with stainless steel races resist wear under repeated use, extending bearing life compared with standard allsteel bearings. Better protection from contaminants: sealed versions (2RS/RS) keep out dirt and moisture to maintain performance in demanding environments. Direct replacement compatibility: intended as directfit replacements for multiple small bearing model numbers listed below, simplifying repairs and upgrades. What this product is and why you need it These are hybrid ceramic bearings: ceramic (silicon nitride) rolling elements with stainless steel inner and outer races. That hybrid construction lowers rolling resistance and reduces heat buildup while retaining the toughness of steel races. Precision grade ABEC7 ensures tight tolerances for applications that require accurate, repeatable rotation. Sealed variants (2RS/RS) help protect internal components from dust and splash, making them suitable for outdoor or wet conditions commonly found in fishing reels and small motors. Key attributes S687 / 687 / S687C / SMR687 / SMR147 / SMR147C: Size: 7 x 14 x 5 mm (inner diameter x outer diameter x width) Seal: 2RS (double rubber seals) and RS options referenced in model names Construction: hybrid ceramic balls with stainless steel races Precision: ABEC7 S698C2OS: Size: 8 x 19 x 6 mm Model: S698C2OS (listed as 1Pcs S698C2OS 8x19x6mm in the product title) Construction and precision: hybrid ceramic with stainless steel races and precision tolerance implied by ABEC7 reference in the primary product line Compatibility and fit Designed as replacements for the following model numbers: 687, S687, S687C, SMR687, SMR147, SMR147C, RS, 2RS. Includes the S698C2OS 8x19x6mm bearing referenced in the title as an additional specified part (1 piece). Verify shaft diameter and housing dimensions before installation: the S687 family uses a 7 mm shaft; the S698C2OS uses an 8 mm shaft. Typical use cases Fishing reels: ideal for replacing worn reel bearings to restore smooth retrieves, reduced drag, and quiet operation. Small electric motors or precision gearboxes: improves efficiency and reduces heat in compact, speed assemblies that require accurate rotation. RC vehicles, instruments, and precision hobby equipment: lowers rolling friction and increases responsiveness where small, precision bearings are required. Installation and maintenance notes Fit bearings to clean, correctly sized shafts and housings to avoid premature wear. Sealed bearings (RS/2RS/2OS variants) come with integrated seals; avoid disassembly of seals unless performing specialist maintenance. Use appropriate pressfit or gentle tapping techniques; avoid excessive force that could damage races or balls. Regular inspection and appropriate lubrication (if service is possible for the sealed variant) will maximize service life. What is included 1 piece S687 2RS hybrid ceramic bearing (7x14x5mm) — ABEC7, stainless steel races with ceramic balls. Models referenced: 687, S687C, SMR687, SMR147, SMR147C, RS, 2RS. 1 piece S698C2OS hybrid ceramic bearing (8x19x6mm) as shown in the product title. Specifications (as listed) S687 family: 7 x 14 x 5 mm, ABEC7, stainless steel + ceramic, 2RS/RS sealing options. S698C2OS: 8 x 19 x 6 mm, model specified as S698C2OS. considerations Confirm the exact model and size required for your equipment before ordering using the model numbers and dimensions provided. These bearings are precision replacements; ensure compatible clearance and seating to achieve the expected performance improvements.