25 Pack Full Ceramic Si3N4 Ball Bearings 689 2rs Sealed Miniature 9mm By 17mm By 5mm For Slick Zero Friction Spin And Rust Free Slide Built Tough For Fast Paced Robotics And Custom Gear Projects Delivers Rock Solid Everyday Spin

Pack of 25 full ceramic 689-2rs mini sealed ball bearings
✔️ 9mm bore, 17mm outer, 5mm thick, ptfe cage, si3n4 material races

These miniature sealed units handle light rotary tools, hobby gadgets, and small motors without slowing down. They cut friction and resist rust in damp workspaces while staying compact for tight machinery layouts.

✅ Model numbers 689-2rs match standard metric miniature sizing standards
✅ Complete silicon nitride build avoids rust in humid workshop setups
✅ PTFE cages allow smooth rotation even at lower operating speeds
✅ Each unit comes double-sealed to block dirt, dust, and moisture
✅ Bulk packs of 25 cover large assembly jobs without constant ordering

💡 Why choose ceramic ball bearings for precision machinery repairs?

These components solve everyday friction problems across many machine types.
- non magnetic properties help avoid interference near sensitive devices
- reduced weight keeps moving parts responsive during rapid cycling tasks
- chemical inert nature stands up well against oils and cleaning solvents
- stable thermal ratings prevent expansion shifts under continuous load stress

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689-2rs Full Ceramic Si3N4 Miniature Bearing 9x17x5 Miniature Bearings Pack of 25

Wholesale 689-2rs sealed Full Ceramic Ball Bearing, measures an inner diameter of 9mm, outer diameter is 17mm and the width is 5mm. 689-2rs Sealed Ball Bearing Type:Full Ceramic Ball Bearing Brand: VXB Cage Material: PTFE (Polytetrafluoroethylene) Balls: Si3N4 Ceramic Inner/outer races: Si3N4 Ceramic Dimensions: 9mmx17mmx5mm Inner Diameter: 9mm Outer Diameter: 17mm Width: 5mm Quantity: 25 Bearings