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Metric Size Miniature Flanged Ball Bearings SF684 2rs

Metric Size Miniature Flanged Ball Bearings SF684 2rs

The SF684 2RS is a compact, sealed ball bearing with a 4mm bore and 9mm outer diameter, crafted entirely from stainless steel for durability. It handles radial loads up to 110 lbf and spins smoothly at speeds up to 47,700 RPM.

Its double rubber seals keep out dust and moisture, while the stainless steel cage ensures quiet operation. The bearing works well in temperatures from -30°C to 110°C, making it versatile for various environments.

With a lightweight design at just 1.15g, it’s ideal for small applications like electric motors or precision instruments. Compliant with RoHS and REACH standards, it’s a reliable choice for maintenance or replacements.

The flange adds extra stability during installation, and the ABEC1 tolerance ensures consistent performance. Perfect for devices where space is limited but reliability is key.

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    Description Features Application Q&A Featured Products Our Process

Product Parameters

  • Part Number SF684 2rs
  • 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 4 mm
  • Width Tolerance -0.12mm to 0
  • Flange Outer Dia 10.3 mm
  • Flange Thickness 1 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 Sealed
  • 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 1.15 g
  • Shield Material Nitrile Rubber
  • Price（$） 1.62
Metric Size Miniature Flanged Ball Bearings SF684 2rs dimension drawing
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Features

How Does SF684 2rs Bearing Reduce Friction?

SF684 2rs Bearing features a sealed design with stainless steel components, ensuring smooth radial movement.
Its seven precision balls reduce friction, allowing speeds up to 47,700 rpm.
The nitrile rubber shield protects against contaminants, maintaining performance in various conditions.
With a dynamic radial load capacity of 110 lbf, it balances efficiency and durability.

Application

Where Is SF684 2rs Bearing Used?
SF684 2rs Bearing is commonly found in small electric motors, such as those used in cooling fans or power tools, thanks to its compact size and sealed design. The stainless steel construction ensures durability even in humid or dusty environments.

In robotics, SF684 2rs Bearing provides smooth rotation for joints and small actuators, where precision and low friction are key. Its high-speed capability makes it suitable for applications requiring rapid movement.

For medical devices like dental tools or handheld diagnostics, SF684 2rs Bearing offers reliable performance with minimal maintenance. The sealed design helps keep contaminants out, ensuring consistent operation over time.

Around the home, SF684 2rs Bearing can be spotted in appliances like blenders or printers, where its quiet operation and long lifespan are appreciated. The lightweight design also makes it easy to integrate into various consumer products.

Q&A

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