684ZZ Bearing 4mm Bore Miniature Ball Bearing 4x9x4mm High Speed And Durable

684ZZ Bearing 4mm Bore Miniature Ball Bearing 4x9x4mm High Speed And Durable

The 684ZZ bearing (4x9x4mm) is a miniature deep groove ball bearing with a 4mm bore, designed for high-speed applications and long service life.

• 684ZZ bearing 4x9x4mm is a precision miniature deep groove ball bearing designed for smooth, high-speed rotation and long service life.
• This 684ZZ miniature ball bearing features deep raceway grooves for stable performance while supporting radial loads and axial loads in both directions.
• With double metal shields (ZZ), the bearing is protected from dust and fine particles and helps retain factory-filled grease for consistent, low-noise operation.
• The 684ZZ bearing 4x9x4mm is a reliable choice for compact motion systems where reduced friction and durability are essential.

Specifications

• Item: 684ZZ Ball Bearing
• Type: Deep Groove Ball Bearing (miniature type)
• Closures: Double Metal Shields (ZZ)
• Lubrication: Pre-lubricated / Maintenance-free
• Dimensions: 4mm (ID) × 9mm (OD) × 4mm (Width)
• Dynamic Load Rating (Cr): 640 N
• Static Load Rating (Cor): 230 N
• Structure: Single row, shielded, high precision
• Material: Chrome Steel / Stainless Steel (optional in some variants)

Features

• Miniature size: 4mm (ID) × 9mm (OD) × 4mm (W)
• Deep groove design: Handles radial loads + axial loads in both directions
• Double shielded (ZZ): Helps protect from contaminants and retains lubrication
• Pre-lubricated: Low maintenance and smooth performance
• High precision: Suitable for high-speed, low-noise applications

Applications

• 3D Printers: Used in compact idler pulleys, extruder mechanisms, rollers, and other small rotating assemblies.
• Small Electric Motors: Suitable for supporting 4mm motor shafts where smooth, low-friction rotation is required.
• RC Cars & Models: Used in wheels, axles, gear systems, and other miniature moving components.
• Robotics: Ideal for small robot joints, wheels, actuators, and precision motion mechanisms

Package Includes

• 1 Piece  of 684ZZ Miniature Deep Groove Ball Bearing (as per order).