685, 685Z, 685ZZ, 685RS, 685-2RS Ball Bearings 5x11x5mm – Ultra-Miniature Deep Groove Ball Bearings for High-Speed & Precision Micro Mechanical Systems

685, 685Z, 685ZZ, 685RS, 685-2RS Ball Bearings 5x11x5mm – Ultra-Miniature Deep Groove Ball Bearings for High-Speed & Precision Micro Mechanical Systems

Ultra-compact 685 series deep groove ball bearings in size 5mm (ID) × 11mm (OD) × 5mm (W), engineered for micro-mechanical applications where minimal space and high rotational precision are critical. Available in multiple sealing options to suit diverse operating environments:

• 685: Open type – ideal for cleanroom or custom-lubrication setups
• 685Z / 685ZZ (685-2Z): Single or double metal shields – protect against fine dust while retaining lubricant
• 685RS / 685-2RS: Single or double rubber seals – provide excellent resistance to moisture, dirt, and contaminants

Made from high-grade chrome steel (GCr15), these micro bearings feature precision-ground raceways for smooth, quiet, low-friction rotation under light radial loads. Widely used in miniature motors, dental handpieces, surgical tools, micro drones, smart wearables, robotics joints, tiny cooling fans, lab automation, and precision instrumentation.

Most sealed versions are pre-lubricated with high-performance grease for maintenance-free operation. The 685 series supports both radial and limited axial loads, making it perfect for ultra-compact, high-RPM systems requiring reliability and long service life.

🔧 Key Specifications:

• Models: 685, 685Z, 685ZZ (685-2Z), 685RS, 685-2RS
• Dimensions: 5 × 11 × 5 mm
• Material: Chrome Steel (GCr15)
• Precision Rating: ABEC-1 (ISO P0)
• Ideal for: Medical micro-tools, micro-electronics, wearables, and precision micro-mechanisms