Sealed Ball Bearing 45x68x12mm 6909RS Chrome Steel With Rubber Seals For Dust Protection High RPM Up To 5500 RPM Precision Ground For Smooth Operation In Industrial And Hobby Applications

This sealed ball bearing is built for smooth rotation and reliable dust protection in small machinery and hobby projects. It's commonly used in compact drives, conveyors, and precision hobby machines where steady radial support is needed.

✅ Size: bore 45 mm, outer diameter 68 mm, width 12 mm (45x68x12mm)
✅ Material: Chrome steel for wear resistance
✅ Seals: double rubber seals (2RS) protect from dust and contamination
✅ Lubrication: pre-greased and ready to install
✅ RPM capability: up to 5,500 rpm under typical loads

💡 What is a sealed ball bearing used for in lightweight machinery? This handy explanation highlights practical applications: - It supports rotating shafts with radial loads in small equipment - It uses double seals to keep grease in and contaminants out - It comes pre-greased for quick installation in DIY projects - Chrome steel provides durable performance at moderate speeds