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Metric Size Standard Miniature Ball Bearings 684zz
Metric Size Standard Miniature Ball Bearings 684zz

Metric Size Standard Miniature Ball Bearings 684zz

The 684zz is a compact miniature ball bearing with a 4mm bore and 9mm outer diameter, crafted from sturdy chrome steel. Its shielded design keeps dirt out while allowing smooth rotation at speeds up to 53,000 RPM.

With a dynamic radial load capacity of 123 lbf, it handles light to moderate loads efficiently. The stainless steel cage and shields ensure durability in varied conditions.

This bearing suits small devices like model motors or precision instruments where space is limited. It operates well between -30°C and 110°C, making it versatile for most environments.

Weighing just 1 gram, it’s ideal for lightweight applications. Compliant with RoHS and REACH standards, it’s a reliable choice for eco-conscious projects.

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Product Parameters

  • Part Number 684zz
  • Brand TFL
  • Interchangeable EZO
  • 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
  • Ball Qty 7
  • Ball Dia 1.5880 mm
  • Radial Clearance 0.002mm to 0.013mm
  • Seal Type Shielded
  • System of Measurement Metric
  • Bearing Type Ball
  • For Load Direction Radial
  • Construction Single Row
  • Inner Ring Type Standard
  • Tolerance Class ABEC1
  • Radial Clearance Trade No MC3
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Stainless Steel
  • Shield Material 300 Series Stainless Steel
  • Dynamic Radial Load 123 lbf
  • Static Radial Load 41 lbf
  • Temperature Range -30° to 110 °C
  • Lubrication Required
  • RoHS Compliant
  • REACH Compliant
  • Max Speed 53000 rpm
  • Weight 1 g
  • Price($) 1.035

Features

How Does 684zz Bearing Reduce Friction?

684zz Bearing features a shielded design with stainless steel shields, protecting against dust while maintaining smooth operation.
Its chrome steel rings and balls are precision-crafted to minimise friction, enhancing efficiency in radial applications.
With a dynamic radial load capacity of 123 lbf, it handles light to moderate loads reliably.
The ABEC1 tolerance ensures consistent performance, making it suitable for miniature applications.

Engineered for Precision: 684zz Bearing

684zz Bearing’s single-row construction and 7-ball design provide balanced load distribution for precise radial movement.
The MC3 radial clearance (0.002mm to 0.013mm) allows for smooth rotation without excessive play.
Its compact 4mm×9mm×4mm size makes it ideal for space-constrained applications.
Shielded with 300 series stainless steel, it offers added protection in dusty environments.

Performance Features of 684zz Bearing

684zz Bearing operates at speeds up to 53,000 rpm, delivering reliable performance in high-speed scenarios.
The chrome steel construction resists wear, while the stainless steel cage ensures long-term alignment.
Its lightweight 1g design reduces inertia, improving responsiveness in miniature devices.
The -30° to 110°C temperature range suits various operating conditions.

Application

Common Applications of 684zz Bearing
In small electric motors, 684zz Bearing provides smooth rotation due to its shielded design, which keeps dust out while maintaining low friction. Its compact size makes it ideal for tight spaces in devices like cooling fans or miniature gearboxes.

What Industries Rely on 684zz Bearing?
The 684zz Bearing is commonly used in consumer electronics, such as printers and handheld tools, where its lightweight and durability are key. Its ABEC1 tolerance ensures reliable performance without unnecessary cost for less demanding applications.

Built for Versatility: 684zz Bearing
This bearing works well in automation equipment like small robotic arms, thanks to its stainless steel cage and chrome steel construction. The 4mm bore size fits neatly into many compact mechanical designs.

Medical vs Industrial: Where 684zz Bearing Excels
In medical devices like dental tools, 684zz Bearing offers quiet operation and precision, while in industrial settings, it handles moderate radial loads in conveyor belt rollers. Its temperature range suits both environments.

Perfect Fit for Automation: 684zz Bearing
For 3D printers and CNC machines, 684zz Bearing’s high-speed capability (up to 53,000 rpm) ensures consistent movement. The shielded design also reduces maintenance needs in dusty workshop conditions.

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