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67 Series
Home Deep Groove Ball Bearings 67 Series

6709-ZZ Thin Section Deep Groove Ball Bearing For Electromechanical Systems | 45×55×6 mm

6709-ZZ Thin Section Deep Groove Ball Bearing For Electromechanical Systems | 45×55×6 mm

The 6709-ZZ is a precision Thin Section Deep Groove Ball Bearing designed for applications where space is limited and weight reduction is critical. Featuring a double shielded design (ZZ) with pressed steel covers on both sides, it effectively retains grease and excludes light contamination while maintaining minimal rotational torque. With its ultra-slim 45x55x6 mm cross-section, this bearing is engineered for compact mechanical and electromechanical systems .

6709-ZZ Deep Groove Ball Bearing 45×55×6 mm | ISO 67 Series – Extra Thin Section | Double Shielded

High-precision miniature bearing featuring an ultra-thin raceway cross-section. Engineered for reliable performance in restricted installation spaces, the 6709-ZZ supports radial loads and light axial loads in both directions. Its optimized internal geometry makes it ideal for precision instrumentation, small motors, and industrial automation where axial space is at a premium .

6709-ZZ Thin Section Deep Groove Ball Bearing For Electromechanical Systems | 45×55×6 mm

Comprehensive Applications

Ideally suited for a broad spectrum of precision and industrial equipment where space saving is critical:

Automation & Robotics
  • Robotic Arm Joints
  • Precision Linear Guides
  • Small Gearboxes
  • End Effectors
Medical & Laboratory
  • Dental Hand Tools
  • Infusion Pumps
  • Diagnostic Scanners
  • Laboratory Centrifuges
Industrial Drives & Controls
  • Stepper Motors
  • Encoders & Resolvers
  • Small Cooling Fans
  • Servo Motors
Consumer & Office Technology
  • Printers & Photocopiers
  • Camera Gimbal Stabilizers
  • Compact Household Appliances
  • Office Automation Equipment

Key Performance Features

01. Ultra-Thin Cross-Section Design

As part of the extra-light 67 series, this bearing offers an extremely narrow radial cross-section. This thin section design significantly reduces the overall footprint and weight of your assembly, enabling the development of smaller, lighter, and more compact machinery without compromising on rotational performance .

02. Effective Dual-Shield Protection

Equipped with non-contact steel shields (ZZ) on both sides, this bearing provides robust protection against dust and larger particles while retaining lubricating grease. This configuration ensures longevity in clean environments and maintains the low friction characteristics required for high-speed operation .

03. Quiet & Smooth Operational Precision

Manufactured to precision tolerances (ABEC 1 / P6 available), the 6709-ZZ utilizes high-grade chrome steel and an optimized internal geometry. This results in exceptionally smooth rotation, low noise, and minimal vibration, ensuring consistent performance in noise-sensitive devices like medical equipment and precision measuring tools .

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6700 Series – Extra Thin Section
Basic Designation 6709
Suffix ZZ (Both sides with steel shields)
Bore Diameter (d) 45 mm
Outer Diameter (D) 55 mm
Width (B) 6 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel or Polyamide (depending on version)
Dynamic Load Rating (Cʳ) 2.58 kN (2580 N)
Static Load Rating (C₀ʳ) 2.40 kN (2400 N) 
Limiting Speed (Grease) 6,000 - 9,000 r/min
Limiting Speed (Oil) 11,000 r/min
Weight (approx.) 25 g

Interchange Part Numbers

Direct replacement for common industry designations:

  • SKF: 6709-ZZ
  • NSK: 6709ZZ
  • FAG: 6709-ZZ
  • NTN: 6709ZZ
  • NACHI: 6709ZZ
  • TIMKEN: 6709-ZZ
  • MRC: 6709ZZ

Design & Configuration

The 6709-ZZ features double pressed steel shields for low-friction protection. For applications requiring a higher degree of sealing against moisture or fine dust—where a slight increase in friction is acceptable, the contact rubber seal version (6709-2RS / 6709-2RU) is also available.

"For environments with higher humidity or fine particulate contamination, the 6709-2RS with double rubber seals offers superior protection and extended service life."

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