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686-2RS Sealed Deep Groove Ball Bearing | Precision Metric Miniature Series | 6×13×5 mm

The 686-2RS is a high-performance miniature ball bearing engineered for versatility and durability in compact mechanical assemblies. Featuring a 6mm bore and 13mm outer diameter, this model is equipped with dual-contact rubber seals (2RS) that provide an airtight defense against contaminants while locking in premium synthetic lubrication. Designed for engineers and manufacturers who require a balance of low torque and high protection, the 686-2RS excels in environments where precision and maintenance-free operation are paramount.

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686-2RS Deep Groove Ball Bearing 6×13×5 mm | ISO 618 Series – Slim Profile | Dual Nitrile Rubber Seals

This metric deep groove bearing is built to manage radial loads and light axial forces with extreme efficiency. The 686-2RS configuration is particularly valued for its "Sealed for Life" design, which eliminates the need for manual regreasing and protects the internal raceways from dust, grit, and moisture. With a limiting speed of 24,000 r/min under grease lubrication, it serves as a critical component for high-speed small-scale motors, handheld electronics, and automated robotics systems.

686-2RS Sealed Deep Groove Ball Bearing | Precision Metric Miniature Series | 6×13×5 mm

Comprehensive Applications

Optimized for micro-mechanics and precision hardware requiring consistent performance in constrained spaces:

Hobby & Consumer Goods
  • RC Cars, Boats, and Aircraft Models
  • High-End Fishing Reels & Spools
  • Skateboard Wheel Bearings (Specific Mini-Variants)
  • Smart Home Gadgets & Rotating Cameras
Medical & Scientific Devices
  • Laboratory Stirrers & Centrifuges
  • Portable Medical Diagnostic Tools
  • Dental Equipment Components
  • Optical Scanning & Positioning Systems
Small Electric Motors & Fans
  • Brushless DC (BLDC) Motors for Drones
  • High-Efficiency Computer Cooling Fans
  • Small Kitchen Appliances & Blenders
  • Power Tool Internal Drive Assemblies
Robotics & Micro-Automation
  • Servo Motor Actuators & Linkages
  • Miniature Conveyor Systems
  • Consumer Drone Arm Rotors
  • Automated Precision Sorting Equipment

Key Performance Features

01. Precision-Grade Smoothness

Manufactured using high-quality GCr15 Chrome Steel, the 686-2RS features super-finished raceways that minimize friction and vibration. This ensures an ultra-quiet operation, which is essential for consumer electronics and medical devices where noise reduction is a key selling point.

02. High Power-to-Size Ratio

Despite its miniature 13mm footprint, the 686-2RS offers a robust dynamic load rating of 1.08 kN. Its optimized internal geometry allows it to handle high-speed rotations without excessive heat buildup, making it a reliable choice for intensive duty cycles.

03. Enhanced Environmental Sealing

The dual 2RS nitrile rubber seals are designed to create a secure contact barrier. This setup is superior for applications exposed to the elements, preventing premature bearing failure caused by particle ingress and ensuring the factory-applied grease remains effective throughout the bearing’s lifecycle.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 618 Series (Metric Thin Section)
Basic Designation 686
Suffix 2RS (Rubber Seals on Both Sides)
Bore Diameter (d) 6 mm
Outer Diameter (D) 13 mm
Width (B) 5 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard (P0) / P6 or P5 Available Upon Request
Cage Material Pressed Steel / Reinforced Nylon
Dynamic Load Rating (Cʳ) 1.08 kN
Static Load Rating (C₀ʳ) 0.44 kN
Limiting Speed (Grease) 24,000 r/min
Limiting Speed (Oil) 30,000 r/min (with seals removed)
Weight (approx.) 0.0028 kg

Interchange Part Numbers

Common industry equivalents for the 686-2RS:

  • SKF: 618/6-2RS1
  • NSK: 686DD
  • NTN: 686LLU
  • KOYO: 686-2RS
  • FAG: 61806-2RSR
  • NMB: L-1360DD

Design & Configuration

The 686-2RS is supplied as a sealed unit for maximum reliability. For projects requiring even higher speeds and lower starting torque, the 686-ZZ (Metal Shielded) or 686 Open versions are available. We also provide stainless steel variants (S686-2RS) for specialized applications in food processing or marine environments.

"The 686-2RS is the definitive choice for engineers seeking a compact, dust-proof bearing solution that delivers high-speed precision and long-term durability."

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Product Tags 6x13x5 mm Deep Groove Ball Bearing          6mm Bore Ball Bearing for Drones          686-2RS Sealed Bearing for RC Motors          Precision 686-2RS for Medical Devices          High Speed Miniature Bearing 686-2RS          Dustproof 686 2RS Miniature Bearing         

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