FR2-5 1/8″ x 5/16″ x 9/64″ Flanged Miniature Deep Groove Ball Bearing

Product Overview

The FR2-5 is a single-row deep groove ball bearing designed to handle radial loads as its primary duty while also accommodating moderate axial (thrust) loads in both directions. Its deep groove geometry ensures smooth ball guidance, efficient load distribution, and reliable performance across a wide range of light-duty applications. Available in multiple configurations—open, double-shielded (ZZ), double-sealed (2RS), and stainless steel variants—the FR2-5 offers the flexibility to match your specific operating environment and maintenance requirements.

Key Features:

• Simplified Mounting with Built-In Flange
  The integrated flange eliminates the need for housing shoulders or retaining rings, reducing housing machining complexity and cost. The flange also ensures reliable axial positioning, preventing the bearing from shifting under thrust loads.

• Ultra-Compact Inch-Size Footprint
  With a 1/8″ bore and just 5/16″ outer diameter, the FR2-5 fits into the tightest mechanical assemblies. Its miniature dimensions enable the miniaturization of 3D printers, CNC machines, robotics, and precision instruments without sacrificing performance.

• High-Speed Capability
  The FR2-5 is engineered for high-speed operation, with a grease-lubricated limiting speed of 60,000 RPM and an oil-lubricated limiting speed of 67,000 RPM. This speed capability makes it ideal for small motors, fans, encoders, and other high-speed rotating equipment.
• Versatile Load Handling
  As a deep groove ball bearing, the FR2-5 is designed to handle radial loads as its primary duty while also accommodating moderate axial (thrust) loads in both directions. This versatility reduces the number of bearings required in an assembly and simplifies mechanical design.
• Corrosion-Resistant Stainless Steel Option
  For applications exposed to moisture, saltwater, or mild chemicals, the stainless steel variant (SFR2-5ZZ) provides enhanced corrosion resistance while maintaining all performance characteristics of the standard chrome steel version.

Applications

The FR2-5 flanged miniature ball bearing is a versatile component found across numerous industries and applications:

• 3D Printers

• Hobby CNC Machines and Engravers

• Robotics and Automation

• Small Electric Motors and Micro Drives 

• Instrumentation and Measuring Devices

• Medical and Laboratory Equipment
• Textile and Printing Machinery