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68 Series
Home Deep Groove Ball Bearings 68 Series

6803-ZZ Shielded Thin-Section Ball Bearing | High-Speed Performance | 17×26×5 mm

6803-ZZ Shielded Thin-Section Ball Bearing | High-Speed Performance | 17×26×5 mm

The 6803-ZZ is a high-performance, metric thin-section ball bearing designed to bridge the gap between miniature precision and load-bearing reliability. Featuring dual metal shields (ZZ), this bearing is optimized for high-speed applications where low frictional torque is essential. With a 17mm bore, 26mm outer diameter, and 5mm width, it provides a space-saving solution for engineers looking to reduce the footprint of their rotating assemblies without compromising on rotational accuracy.

6803-ZZ Deep Groove Ball Bearing 17x26x5 mm | Metric Thin Section | Double Metal Shielded

Manufactured from premium vacuum-degassed GCr15 chrome steel, the 6803-ZZ is engineered to handle radial and moderate axial loads in both directions. The non-contact metal shields provide a robust barrier against larger debris while ensuring the factory-grade lubricant remains sealed within the raceways. This specific configuration is highly valued in the cycling industry, drone manufacturing, and robotics for its exceptional balance of weight-to-strength ratio and high-speed ceiling.

6803-ZZ Shielded Thin-Section Ball Bearing | High-Speed Performance | 17×26×5 mm

Comprehensive Applications

Specifically designed for precision-driven and weight-sensitive equipment:

Bicycles & Micro-Mobility
  • High-end road and mountain bike hubs
  • Bottom brackets and suspension pivots
  • Electric scooter motor assemblies
  • Skateboard and longboard wheel upgrades
Robotics & High-Tech Automation
  • Drone motor outrunners and gimbals
  • Precision robotic arm joints (Small-scale)
  • Automated laboratory equipment
  • Stepper motors and micro-actuators
Consumer Electronics & Appliances
  • High-speed cooling fans for servers and PC builds
  • 3D printer extruder motors and linear motion systems
  • Handheld power tools and dental equipment
  • Smart home appliance rotating components
Industrial Instrumentation
  • Optical encoders and measurement sensors
  • Small centrifugal pumps
  • Textile machinery tension rollers
  • RC vehicles and hobby-grade models

Key Performance Features

01. Ultra-Thin Profile for Compact Design

With a cross-section of only 5mm, the 6803-ZZ allows for extremely compact housing designs. This "thin-section" geometry is critical for reducing the overall weight of portable devices and high-performance sports equipment, providing a streamlined integration that standard series bearings cannot match.

02. Low-Friction High-Speed Optimization

The 6803-ZZ utilizes non-contact metal shields that do not press against the inner ring. This design minimizes drag, allowing for significantly higher limiting speeds compared to rubber-sealed variants. It is the ideal choice for applications where heat dissipation and energy efficiency are top priorities.

03. Industrial-Grade Material Integrity

Each bearing is crafted from high-carbon chromium steel (GCr15), through-hardened for maximum durability. The precision-ground raceways ensure a quiet, vibration-free operation. For specialized environments, we offer various clearance options (such as C3) and precision ratings (P6 or P5) to meet the strictest industrial standards.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6800 Series (Thin Section / Extra Light)
Basic Designation 6803
Suffix ZZ (Double Steel Shields)
Bore Diameter (d) 17 mm
Outer Diameter (D) 26 mm
Width (B) 5 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Shield Material Pressed Steel Ribbon
Dynamic Load Rating (Cʳ) 2.60 kN
Static Load Rating (C₀ʳ) 1.55 kN
Limiting Speed (Grease) 24,000 - 28,000 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.008 kg (8g)

Interchange Part Numbers

Directly replaces the following manufacturer parts:

  • SKF: 6803-2Z
  • NSK: 6803ZZ
  • FAG: 6803-2Z
  • NTN: 6803ZZ
  • KOYO: 6803ZZ
  • EZO: 6803ZZ

Design & Configuration

The 6803-ZZ is configured with dual non-contact steel shields as standard, specifically engineered for applications where low starting torque and maximum rotational speed are critical. Unlike contact rubber seals, these precision-pressed shields protect the internal raceways from larger debris and retain the factory-applied grease without creating frictional drag against the inner ring. For environments involving high-pressure washdowns or extremely fine dust, the rubber-sealed (2RS) configuration is available as a high-protection alternative.

"Engineered for high-RPM efficiency and precision, the 6803-ZZ is the premier choice for high-end bicycle hubs, drone motors, and high-speed industrial sensors where minimizing energy loss is paramount."

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