685-ZZ Miniature Deep Groove Ball Bearing For Small Electric Motors | 5×11×5 Mm

The 685-ZZ is a Compact Double-Shielded Deep Groove Ball Bearing designed for reliable performance in small-scale mechanical applications. Featuring the standard deep groove raceway, this miniature bearing efficiently handles moderate radial loads and light axial loads in both directions. With a 5 mm bore, 11 mm outer diameter, and a square-type 5 mm width profile, it offers a robust yet space-efficient design. Equipped with double metal shields (ZZ) for contamination protection, it is well-suited for small electric motors, light-duty mechanisms, and precision devices requiring smooth operation with minimal maintenance.



685-ZZ Deep Groove Ball Bearing 5x11x5 mm | Standard Miniature Series | Double Metal Shields (ZZ)

A widely used miniature bearing built with the universal deep groove raceway geometry. Designed for stable and quiet operation at speeds up to 32,000 r/min (Grease). The 685-ZZ combines a compact footprint with integrated shielding, making it a reliable choice for various small electromechanical assemblies and light industrial applications.

685-ZZ Miniature Deep Groove Ball Bearing For Small Electric Motors | 5×11×5 Mm

Comprehensive Applications

Ideal for compact devices and light-duty mechanisms:

Small Motors & Drives
  • Small DC Motor Shafts

  • Cooling Fan Motors for Electronics

  • Miniature Gearmotor Output Shafts
  • Hobby Motor Supports (RC, Models)
Precision Instruments & Controls
  • Meter and Gauge Movements
  • Sensor and Encoder Rotations
  • Laboratory Equipment Drives
  • Optical Device Adjusters
Office & Consumer Devices
  • Printer and Scanner Mechanism Rollers

  • Small Appliance Actuators
  • Power Tool Auxiliary Drives
  • Vending Machine Moving Parts
General Light Industrial
  • Textile Machine Thread Guides
  • Conveyor Guide Rollers (Light-Duty)
  • Packaging Machine Feed Wheels
  • Valve and Damper Control Links

Key Performance Features

01. Compact & Balanced Design

The square-type cross-section (equal bore and width) provides a sturdy and space-optimized structure with reliable radial load capacity for its size. Manufactured from chrome steel, it ensures durability and consistent performance in light to moderate duty cycles.

02. Integrated Double-Shield Protection

Comes standard with two metal shields (ZZ), offering effective protection against dust and debris while retaining lubrication. This makes it suitable for applications where re-lubrication is not intended or where environmental contamination is a concern.

03. Smooth & Reliable Rotation

Produced to standard miniature bearing tolerances. The precision raceway and ball geometry promote smooth, low-vibration operation, contributing to quiet performance and extended service life in small mechanisms.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 68 Series – Miniature Series
Basic Designation 685
Suffix Double Metal Shield (ZZ)
Bore Diameter (d) 5 mm
Outer Diameter (D) 11 mm
Width (B) 5 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel or Nylon (Standard)
Dynamic Load Rating (Cʳ) 1.47 kN
Static Load Rating (C₀ʳ) 0.66 kN
Limiting Speed (Grease) 32,000 r/min
Limiting Speed (Oil) 40,000 r/min
Weight (approx.) 3.8 g

Interchange Part Numbers

Direct replacement for:

  • Generic: 685ZZ, 685-2Z
  • NSK: 685ZZ
  • NTN: 685LLU

Design & Configuration

The 685-ZZ is supplied as a pre-lubricated, double-shielded unit. The metal shields provide a cost-effective seal against dry contaminants. For applications requiring different sealing solutions, such as rubber seals (RS, 2RS) or an open design, please inquire about availability.

"For small DC motors, light-duty mechanisms, and applications requiring a shielded miniature bearing, the 685-ZZ offers a compact, reliable, and maintenance-friendly solution. Its square profile and integrated protection make it a versatile component for space-conscious designs."



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