The SW 684-2Z is a precision miniature deep groove ball bearing engineered for high-speed, high-accuracy applications where space and weight are critical constraints. Featuring an internal diameter (d) of 4mm, an outer diameter (D) of 9mm, and a width (B) of 2.5mm, this bearing conforms to ISO standards for dimensional consistency. The '2Z' designation signifies two non-contact metal shields installed on both sides, providing excellent protection against dust and contaminants while retaining factory lubrication (grease). Its robust construction utilizes high-grade bearing steel, ensuring minimized friction, low vibration operation, and reliable performance across varying temperature profiles in sensitive equipment.
As a Senior Product Manager, we recommend the 684-2Z for complex electromechanical systems, including small-scale robotics, medical instruments, high-precision sensors, and miniature electric motors. Its optimized internal geometry provides a competitive balance of radial and axial load capacity (Dynamic Load Rating Cr: 0.70 kN), translating into extended service life and reduced maintenance cycles. Choosing the SW 684-2Z ensures durability and consistent operational excellence, reducing the Total Cost of Ownership (TCO) in critical high-volume manufacturing environments.
Key Features
High-Precision P6 tolerance suitable for sensitive instruments.
Equipped with 2Z metal shields for robust contaminant exclusion and enhanced lubricant retention.
Optimized internal geometry allows for high rotational speeds (up to 56,000 r/min).
Low friction coefficient and minimal starting torque, ideal for battery-operated or miniature drives.
Manufactured from durable chrome steel (52100) for excellent wear resistance and extended service life.
