686 ZZ Miniature Deep Groove Ball Bearing for Compact Drive Systems | 6×13×5 Mm

The 686-ZZ is a High-Performance Miniature Deep Groove Ball Bearing developed for precision applications demanding reliable operation within a slim profile. Featuring dual metal shields (ZZ) on both sides, this bearing offers advanced protection against airborne particles and debris while ensuring smooth, low-torque rotation. With a 6 mm bore and a compact 5 mm width, it is engineered for small motors, compact fans, and electromechanical devices where space efficiency and contamination resistance are essential.



686 ZZ Deep Groove Ball Bearing 6x13x5 mm | ISO 68 Series – Extra Light | Double Shielded

This precision miniature bearing incorporates a universal deep groove design, enabling stable high-speed performance up to 38,000 r/min (Oil). The 686-ZZ is capable of supporting moderate radial loads and limited axial loads in both directions, making it well-suited for applications in small machinery, instrumentation, and environments where minimal friction and particulate protection are required.

686 ZZ Miniature Deep Groove Ball Bearing for Compact Drive Systems | 6×13×5 Mm

Comprehensive Applications

Ideal for a diverse range of compact mechanical and industrial systems:

Precision Devices & Medical Equipment
  • Diagnostic Instrument Rotors
  • Portable Medical Handpieces
  • Optical Encoders and Sensors
  • Laboratory Sample Handling Systems
Small Motors & Actuators
  • Micro BLDC and DC Motors
  • Cooling Fan Motors for IT & Telecom
  • Servo and Encoder Systems
  • Small Pump and Valve Drives
Office & Commercial Equipment
  • Printers, Scanners, and Copiers
  • Banking Card Readers
  • Barcode Scanners
  • Presentation Pointer Mechanisms
Automation & Consumer Electronics
  • Small Robotics and Actuators
  • Drone Gimbal Motors
  • Automotive Accessory Motors
  • Smart Home Device Drives

Key Performance Features

01. Slim Design with Reliable Capacity

Built to the extra-light series in a space-saving 6×13×5 mm configuration, this bearing delivers useful load-carrying ability in a slender form factor, ideal for applications with axial space constraints.

02. Effective Contamination Defense

Double non-contact steel shields provide reliable sealing against dust and particles from both sides, helping to retain lubricant and extend operational life without adding significant rotational drag.

03. Smooth and Quiet Running

Precision-manufactured components ensure consistent operation with minimal vibration and noise, supporting stable performance in sensitive devices such as office equipment and medical tools.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 68 Series – Extra Light
Basic Designation 686
Suffix ZZ (Both sides with steel shields)
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 / P5 Grade Available
Cage Material Pressed Steel
Dynamic Load Rating (Cʳ) 1.96 kN
Static Load Rating (C₀ʳ) 0.86 kN
Limiting Speed (Grease) 28,000 r/min
Limiting Speed (Oil) 38,000 r/min
Weight (approx.) 3.8 g

Interchange Part Numbers

Direct replacement for:

  • SKF: 686-ZZ
  • NSK: 686 ZZ
  • FAG: 686 ZZ
  • NMB: R-1686ZZ
  • NTN: 686ZZ

Design & Configuration

The 686-ZZ is furnished with double steel shields as standard, delivering enhanced internal protection in dusty or debris-prone conditions. For applications requiring improved sealing against fluids or finer contaminants, the double rubber-sealed variant (686-2RS) is also offered.

"The 686-ZZ is a versatile choice for slim-profile designs where reliable contamination protection and smooth operation are needed."



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