• High-Speed Dental Handpiece Turbines
• Minimally Invasive Surgical Micro-Tools
• Portable Medical Diagnostic Equipment
• Ophthalmic Laser Positioning Units

• Optical Scanning Mirror Assemblies
• Centrifuge Rotor Micro-Pivots
• Laboratory Micro-Pump Drive Shafts
• Automated Liquid Handling Sensors

• High-RPM Brushless DC (BLDC) Motors
• Ultra-Quiet Cooling Micro-Fans
• Drone Gimbal Brushless Actuators
• Miniature Stepper Motor Components

• Smartwatch Internal Gear Mechanisms
• Compact Camera Lens Focusing Drives
• Professional Stylus Pen Internal Pivot
• Portable Micro-Audio Interface Dials

01. Low-Friction Metal Shielding

Equipped with dual non-contact steel shields (ZZ), this bearing is designed to keep out contaminants without the friction associated with rubber seals. This configuration allows for the highest possible rotational speeds and lowest starting torque, ensuring smooth startup in low-power micro-applications.

02. Precision Micro-Architecture

Crafted from premium high-carbon chrome steel (GCr15), the 681-ZZ maintains a microscopic 1 mm width. This ultra-thin profile enables engineers to design lighter, smaller, and more efficient mechanical systems without compromising on the axial stability of the rotating shaft.

03. Exceptional High-Speed Stability

Every component is manufactured to strict P5 precision tolerances and V-Class vibration standards. The precision-balanced balls and refined raceways ensure that the bearing operates with minimal noise and thermal expansion, even when reaching speeds exceeding 90,000 RPM.

Interchange Part Numbers

Common industry equivalents for global sourcing:

• SKF: 681-2Z
• NSK: 681ZZ
• NTN: 681ZZ
• KOYO: 681ZZ
• NMB: L-310ZZ

Design & Configuration

The 681-ZZ is the industry standard for high-performance micro-mechanics where operational speed takes precedence over heavy environmental sealing. The metal shields provide a durable barrier against dust in relatively clean laboratory or electronic environments while allowing the bearing to spin freely with negligible resistance.

For specialized medical or aerospace needs, this model is also available in a stainless steel variant (S681-ZZ) to provide superior resistance to corrosion and oxidation. For applications requiring maximum sealing against fine powders or liquids, the contact-sealed version (681-2RS) is the recommended alternative.

"When your project demands the ultimate balance between microscopic size and high-velocity performance, the 681-ZZ delivers unrivaled precision for the world's most delicate mechanical systems."