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Metric Size Miniature Flanged Ball Bearings F691

Metric Size Miniature Flanged Ball Bearings F691

The F691 is a small radial ball bearing with a 1mm bore and 4mm outer diameter, crafted from durable chrome steel. It’s designed for high-speed applications, reaching up to 100,000 RPM, and handles radial loads up to 27 lbf.

Its open design allows for easy lubrication, while the stainless steel cage ensures smooth operation. The bearing features a flange for secure mounting, with a flange outer diameter of 5mm.

With a compact width of just 1.6mm, it’s ideal for precision devices like small motors or medical instruments. It operates reliably in temperatures from -30°C to 110°C.

Compliant with RoHS and REACH standards, this lightweight bearing weighs only 0.14g, making it perfect for applications where space and weight are critical.

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Product Parameters

  • Part Number F691
  • Brand TFL
  • System of Measurement Metric
  • Bearing Type Ball
  • Bore Dia 1 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 4 mm
  • Outer Dia Tolerance -0.008mm to 0
  • Width 1.6 mm
  • Width Tolerance -0.12mm to 0
  • Flange Outer Dia 5 mm
  • Flange Thickness 0.5 mm
  • Radial Clearance 0.002mm to 0.013mm
  • Ball Qty 5
  • Ball Dia 0.8000 mm
  • For Load Direction Radial
  • Construction Single Row
  • Inner Ring Type Standard
  • Seal Type Open
  • Tolerance Class ABEC1
  • Radial Clearance Trade No MC3
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Stainless Steel
  • Dynamic Radial Load 27 lbf
  • Static Radial Load 7 lbf
  • Max Speed 100000 rpm
  • Temperature Range -30° to 110 °C
  • Lubrication Required
  • RoHS Compliant
  • REACH Compliant
  • Weight 0.14 g
  • Price（$） 18.5
Metric Size Miniature Flanged Ball Bearings F691 dimension drawing
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Features

How Does F691 Bearing Achieve High-Speed Performance?

F691 Bearing is crafted with chrome steel rings and balls, ensuring durability and smooth operation at high speeds.
Its maximum speed of 100,000 rpm makes it suitable for precision applications requiring rapid rotation.
The stainless steel cage maintains ball alignment, reducing friction and wear during operation.
With a dynamic radial load capacity of 27 lbf, it balances performance and reliability in compact designs.

Application

Common Applications of F691 Bearing
F691 Bearing is widely used in small precision instruments, such as watch movements and miniature motors, where its compact size and high-speed capability are essential. The chrome steel construction ensures durability even in continuous operation.

In consumer electronics, F691 Bearing can be found in devices like miniature fans and handheld gadgets, providing smooth rotation with minimal noise. Its lightweight design makes it ideal for portable applications.

For medical devices, F691 Bearing is suitable for delicate equipment like dental tools and surgical instruments, where precision and reliability are critical. The open seal design allows for easy lubrication, maintaining performance over time.

Automation systems benefit from F691 Bearing in small robotic arms and micro-actuators, where its high-speed performance ensures accurate movement. The stainless steel cage adds to its longevity in demanding environments.

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