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68 Series
Home Deep Groove Ball Bearings 68 Series

6801-ZZ High-Speed Thin Section Ball Bearing | 12×21×5 mm for Robotics & Small Motors

6801-ZZ High-Speed Thin Section Ball Bearing | 12×21×5 mm for Robotics & Small Motors

The 6801-ZZ is a high-performance, extra-thin section ball bearing designed for precision assemblies where minimizing friction and weight is paramount. Equipped with dual-sided metal shields (ZZ), this bearing excels in high-speed environments by retaining factory-grade lubricant while offering lower rotational torque compared to rubber-sealed alternatives. With a 12mm bore and a compact 21mm outer diameter, the 6801-ZZ is the ideal solution for high-frequency spindles, lightweight drone motors, and sensitive medical instrumentation requiring consistent, low-vibration rotation.

6801-ZZ Deep Groove Ball Bearing 12x21x5 mm | Metric Thin Series | Double Shielded

Engineered to meet rigorous ISO standards, the 6801-ZZ utilizes a specialized thin-section architecture to provide reliable radial support within a very small footprint. The non-contact metal shields are specifically designed to protect the internal raceways from larger debris without sacrificing the bearing's maximum RPM potential. This makes it a top-tier choice for maintenance-free applications where thermal buildup must be kept to a minimum, such as in high-end RC racing components and precision optical equipment.

6801-ZZ High-Speed Thin Section Ball Bearing | 12×21×5 mm for Robotics & Small Motors

Comprehensive Applications

Optimized for high-speed rotation and compact mechanical designs:

Robotics & Precision Automation
  • Servo motor encoders and feedback sensors
  • Lightweight robotic arm joints and actuators
  • Automated laboratory equipment and samplers
  • Small-scale CNC spindle supports
Small Electric Motors & Power Tools
  • High-speed brushless DC (BLDC) motors
  • Handheld dental and surgical power tools
  • Cooling fans for servers and telecommunications
  • Portable electronic massagers and gym equipment
RC & Hobby Electronics
  • High-performance drone motor assemblies
  • RC car drivetrain and transmission components
  • Model aircraft engines and turbine supports
  • Gimbal stabilization systems for cameras
Office & Optical Equipment
  • Laser printer scanning mirrors and rollers
  • Micro-film processing machinery
  • 3D printer stepper motors and lead screw supports
  • High-definition camera lens focusing mechanisms

Key Performance Features

01. Low-Friction High-Speed Efficiency

The 6801-ZZ features dual-sided pressed steel shields that provide a "non-contact" seal. Unlike rubber seals that rub against the inner ring, these metal shields allow for significantly higher limiting speeds and lower startup torque. This is critical for battery-operated devices and high-speed motors where energy efficiency and heat dissipation are primary concerns.

02. Compact Thin-Section Profile

With a cross-section of only 4.5mm (distance between inner and outer ring), the 6801-ZZ allows engineers to design smaller, lighter housings. Despite its slim profile, the deep-groove geometry is precision-ground to handle radial loads and moderate axial loads in both directions, offering a high power-to-weight ratio for aerospace and portable tech.

03. Premium GCr15 Material Integrity

Forged from high-vacuum degassed GCr15 chrome steel, our 6801-ZZ bearings undergo rigorous heat treatment to achieve optimal Rockwell hardness. This ensures the raceways resist plastic deformation and fatigue. Each unit is pre-lubricated with premium high-temperature grease, ensuring smooth operation immediately out of the box.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6800 Series (Thin Section / Extra Light)
Basic Designation 6801
Suffix ZZ (Double Steel Shields)
Bore Diameter (d) 12 mm
Outer Diameter (D) 21 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) 1.92 kN
Static Load Rating (C₀ʳ) 1.04 kN
Limiting Speed (Grease) 32,000 r/min
Limiting Speed (Oil) 38,000 r/min
Weight (approx.) 0.006 kg

Interchange Part Numbers

Directly replaces the following manufacturer parts:

  • SKF: 6801-2Z
  • NSK: 6801ZZ
  • FAG: 6801-2Z
  • NTN: 6801ZZ
  • KOYO: 6801ZZ
  • EZO: 6801ZZ

Design & Configuration

The 6801-ZZ comes standard with high-speed grease for general-purpose use. For specialized environments, we offer C3 internal clearance to accommodate thermal expansion, or AISI 440C stainless steel variants for moisture-rich environments. If your application involves extreme dust or liquid splashes, the contact-sealed 6801-2RS version is also available.

"The 6801-ZZ represents the perfect balance of miniaturization and high-speed reliability, providing the precision needed for the next generation of robotics and high-efficiency motors."

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Details

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