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Metric Size Miniature Flanged Ball Bearings SF684

Metric Size Miniature Flanged Ball Bearings SF684

The SF684 is a compact radial ball bearing with a 4mm bore and 9mm outer diameter, crafted entirely from stainless steel for corrosion resistance. It handles radial loads up to 110 lbf and spins exceptionally fast, reaching speeds of 47,700 RPM.

Its single-row design with an open seal simplifies maintenance, while the stainless steel cage ensures durability. The bearing operates smoothly in temperatures from -30°C to 110°C, making it versatile for various environments.

With a lightweight build at just 0.74g, it’s ideal for small, high-speed applications like precision instruments or miniature motors. The flange adds stability, helping it stay securely in place during operation.

Compliant with RoHS and REACH standards, it’s a reliable choice for eco-conscious projects. Regular lubrication is recommended to maintain peak performance over time.

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Product Parameters

  • Part Number SF684
  • Brand TFL
  • System of Measurement Metric
  • Bearing Type Ball
  • Bore Dia 4 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 9 mm
  • Outer Dia Tolerance -0.008mm to 0
  • Width 2.5 mm
  • Width Tolerance -0.12mm to 0
  • Flange Outer Dia 10.3 mm
  • Flange Thickness 0.6 mm
  • Radial Clearance 0.002mm to 0.013mm
  • Ball Qty 7
  • Ball Dia 1.5880 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 Stainless Steel
  • Ball Material Stainless Steel
  • Cage Material Stainless Steel
  • Dynamic Radial Load 110 lbf
  • Static Radial Load 37 lbf
  • Max Speed 47700 rpm
  • Temperature Range -30° to 110 °C
  • Lubrication Required
  • RoHS Compliant
  • REACH Compliant
  • Weight 0.74 g
  • Price（$） 1.62
Metric Size Miniature Flanged Ball Bearings SF684 dimension drawing
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Features

Why Choose SF684 Bearing for Precision Tasks?

SF684 Bearing is crafted with stainless steel rings and balls, ensuring high precision and corrosion resistance.
Its compact design, with a bore diameter of 4 mm and width of 2.5 mm, makes it ideal for tight spaces.

The open seal type allows for easy lubrication, maintaining smooth operation at speeds up to 47,700 rpm.
With a dynamic radial load capacity of 110 lbf, it handles light to moderate loads efficiently.

SF684 Bearing’s ABEC1 tolerance class ensures consistent performance in precision applications.
The stainless steel cage keeps the balls aligned, reducing friction and extending service life.

Application

Common Applications of SF684 Bearing
SF684 Bearing is widely used in small electric motors, such as those found in cooling fans and power tools, thanks to its compact size and high-speed capability. The stainless steel construction ensures durability in various environments.

In automation systems, SF684 Bearing fits seamlessly into robotic arms and precision instruments, where smooth rotation is essential. Its open design allows for easy lubrication, maintaining performance over time.

For consumer electronics like printers and handheld devices, SF684 Bearing provides reliable support with minimal noise. The lightweight design makes it ideal for applications where space and weight are critical factors.

Medical devices, such as dental tools and lab equipment, benefit from SF684 Bearing’s corrosion-resistant materials. Its ability to handle high speeds ensures consistent operation in sensitive environments.

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