693 ZZ Ultra-Miniature Deep Groove Ball Bearing for High-Speed Micro Motors | 3×8×3 mm

The 693-ZZ is a Premium Ultra-Miniature Deep Groove Ball Bearing engineered for compact, high-precision applications. Featuring double metal shields (ZZ) on both sides, this metric bearing provides effective dual-side protection against dust and light contaminants, ensuring smooth operation in sensitive mechanisms. With an ultra-small 3mm bore, it is an essential component for micro-motors, precision instrumentation, small electronic devices, and any application where extreme miniaturization and reliable rotation are required.



693 ZZ Deep Groove Ball Bearing 3x8x3 mm | ISO 69 Series – Extra Thin | Double Shielded

A highly compact precision bearing built with the universal deep groove geometry. Designed for smooth and quiet operation at speeds up to 50,000 r/min (Oil). The 693-ZZ is capable of supporting light radial loads, making it a critical and dependable component for microelectronics, fine mechanics, and high-speed miniature drives.

693 ZZ Deep Groove Ball Bearing Double Metal Shielded Micro Bearing

Comprehensive Applications

Ideally suited for a broad spectrum of ultra-compact equipment:

Micro Motors & Drone
  • Coreless Micro DC Motors
  • Tiny Vibration Motors
  • Small Sensor Actuators
  • Micro Gearmotor Outputs
Precision Instruments & Optics
  • Optical Encoder Discs & Scanners
  • Laser Diode & Lens Positioning
  • Laboratory Micro-Pumps & Stirrers
  • Medical Diagnostic Device Rotors
Small Electronics & Data Storage
  • Cooling Fans for Slim Electronics
  • Hard Drive/SSD Spindle Motors
  • Printer/Scanner Carriage Guides
  • Data Tape Drive Guides
High-End Hobby & Models
  • Micro RC Car & Drone Motors
  • High-Precision Model Making
  • Small Camera Auto-Focus Gears
  • Watch & Clock Mechanisms

Key Performance Features

01. Design & Protection

The dual non-contact pressed steel shields offer reliable two-sided protection in environments with airborne dust. This shield design is crucial for retaining lubrication within the bearing's tiny internal space while adding negligible friction, which is vital for low-torque micro applications.

02. Ultra-Compact & Lightweight

As part of the extra-thin series, the 693-ZZ achieves an exceptionally small cross-section, providing reliable performance in the absolute minimum of axial and radial space. Its minimal weight and size are engineered for devices where every millimeter and gram counts.

03. High-Speed & Smooth Operation

Manufactured to fine precision tolerances (up to P5 precision grades). Its optimized internal geometry ensures low friction and minimal vibration, enabling stable and quiet rotation essential for sensitive applications like small fans, encoder discs, and precision optical devices.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 69 Series – Extra Thin
Basic Designation 693
Suffix ZZ (Both sides with steel shields)
Bore Diameter (d) 3 mm
Outer Diameter (D) 8 mm
Width (B) 3 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel Ribbon
Dynamic Load Rating (Cʳ) 0.61 kN
Static Load Rating (C₀ʳ) 0.26 kN
Limiting Speed (Grease) 40,000 r/min
Limiting Speed (Oil) 50,000 r/min
Weight (approx.) 0.6 g

Interchange Part Numbers

Direct replacement for:

  • SKF: 693-2Z
  • NSK: 693 ZZ
  • FAG: 693-ZZ
  • NMB: MR83ZZ
  • NTN: 693ZZ

Design & Configuration

The 693-ZZ is supplied with double pressed steel shields as the standard configuration. For applications requiring protection against moisture or very fine dust, alternative versions with contact rubber seals (693-2RS) can be selected, though they introduce slightly higher starting torque.

"For the most compact devices such as micro drone motors, miniature cooling fans, or optical encoder shafts, the 693-ZZ provides essential performance and protection in an ultra-small package.



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