S6903-2RS Bearing ABEC-3 - Ceramic Si3N4 Balls

S6903-2RS Hybrid Ceramic Ball Bearing✔️ ABEC-3 Precision - 17mm x 30mm x 7mm, Si₃N₄ Ceramic Balls The S6903-2RS is a premium hybrid ceramic bearing with stainless steel races and cage, plus ultra-smooth Si₃N₄ ceramic balls. With rubber seals on both sides and SRL grease inside, it's designed to spin fast, stay clean, and resist wear. Rated ABEC-3 for dependable accuracy in most high-speed setups. Sold as one bearing. ✅ Inner Diameter: 17mm✅ Outer Diameter: 30mm✅ Width: 7mm✅ Balls: Silicon Nitride (Si₃N₄) ceramic✅ Rings & Cage: Stainless steel✅ Sealed both sides with rubber RS/2RS1 seals✅ Pre-lubed with SRL low-friction grease✅ Radial Clearance: C0✅ Precision Rating: ABEC-3✅ Quantity: 1 bearing Equivalents:☑️ 6903-2RS1☑️ 6903-2RZ☑️ SS61903-2RS1 P6☑️ SS61903RS1 💡 When should you choose an ABEC-3 hybrid ceramic bearing?It’s a smart pick for most hobby and high-speed electric motor uses. Offers smooth rotation with less friction than steel-only bearings More affordable than higher