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Metric Size Standard Miniature Ball Bearings 639zz

Metric Size Standard Miniature Ball Bearings 639zz

The 639zz is a compact metric ball bearing with a 9mm bore and 30mm outer diameter, crafted from sturdy chrome steel. Its shielded design keeps dust out while allowing smooth rotation at speeds up to 24,000 RPM.

This single-row bearing handles radial loads up to 891 lbf, with stainless steel cage ensuring durability. The ABEC1 tolerance offers reliable performance for everyday applications.

With a width of just 10mm, it fits neatly in tight spaces. Ideal for small machinery, electric motors, or hobby projects where space-saving design matters.

Weighing only 37.1g, it’s lightweight yet robust. Compliant with RoHS and REACH standards, it operates in temperatures from -30°C to 110°C. Regular lubrication maintains its smooth performance.

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Product Parameters

  • Part Number 639zz
  • Brand TFL
  • Interchangeable EZO
  • Bore Dia 9 mm
  • Bore Dia Tolerance -0.008mm to 0
  • Outer Dia 30 mm
  • Outer Dia Tolerance -0.008mm to 0
  • Width 10 mm
  • Width Tolerance -0.12mm to 0
  • Ball Qty 7
  • Ball Dia 4.7620 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 891 lbf
  • Static Radial Load 374 lbf
  • Temperature Range -30° to 110 °C
  • Lubrication Required
  • RoHS Compliant
  • REACH Compliant
  • Max Speed 24000 rpm
  • Weight 37.1 g
  • Price（$） 1.035
Metric Size Standard Miniature Ball Bearings 639zz dimension drawing
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Features

How Does 639zz Bearing Reduce Friction?

639zz Bearing features a shielded design with chrome steel rings and balls, ensuring smooth radial movement.
Its ABEC1 tolerance class provides consistent performance, reducing friction during operation.

The stainless steel cage maintains proper ball alignment, minimising wear and enhancing efficiency.
With a maximum speed of 24,000 rpm, it delivers reliable performance in high-speed applications.

639zz Bearing’s radial clearance of 0.002mm to 0.013mm ensures precise operation.
The chrome steel construction resists wear, making it suitable for long-term use.

Its compact 9mm bore size makes it ideal for miniature applications.
The shielded design helps keep contaminants out, reducing maintenance needs.

Application

Common Applications of 639zz Bearing
In industrial settings, 639zz Bearing is widely used in small machinery like electric motors and pumps, where its shielded design keeps contaminants out. The ABEC1 tolerance ensures reliable performance in moderate-speed applications.

How Does 639zz Bearing Improve Performance?
For consumer electronics, 639zz Bearing helps reduce friction in devices like printers and cooling fans, enhancing their lifespan. Its chrome steel construction offers a good balance of durability and cost-effectiveness.

Built for Heavy-Duty Use: 639zz Bearing
In automotive applications, 639zz Bearing supports auxiliary components such as alternators and small gearboxes. The stainless steel cage provides extra resistance to wear in high-temperature environments.

Medical vs Industrial: Where 639zz Bearing Excels
While 639zz Bearing is common in industrial tools, its precision also makes it suitable for medical devices like dental drills. The shielded design ensures smooth operation in sterile environments.

Perfect Fit for Automation: 639zz Bearing
In robotics, 639zz Bearing is often found in joint mechanisms and small actuators. Its compact size and radial load capacity make it ideal for precise, repetitive movements.

Q&A

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