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Inch Size Miniature Ball Bearings R3A

Inch Size Miniature Ball Bearings R3A

The R3A is a compact inch-size ball bearing, measuring just 0.1875″ by 0.625″ by 0.196″, crafted from sturdy chrome steel. It handles radial loads up to 283 lbf and spins smoothly at speeds up to 38,000 RPM.

Its open design allows for easy lubrication, while the stainless steel cage ensures durability. With a radial clearance of 0.00008″ to 0.0005″, it offers smooth operation in various conditions.

This bearing works well in temperatures from -86°F to 230°F, making it versatile for different environments. Ideal for small machinery or precision instruments where space is limited.

Weighing only 5.08g, it’s lightweight yet robust. Compliant with RoHS and REACH standards, it’s a reliable choice for replacements or new installations.

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Product Parameters

  • Part Number R3A
  • Brand TFL
  • System of Measurement Inch
  • Bearing Type Ball
  • For Load Direction Radial
  • Construction Single Row
  • Inner Ring Type Standard
  • Seal Type Open
  • Tolerance Class ABEC1
  • Radial Clearance Trade No MC3
  • Radial Clearance 0.00008" to 0.0005"
  • Ball Qty 8
  • Bore Dia 0.1875"
  • Bore Dia Tolerance -0.0003" to 0"
  • Outer Dia 0.625"
  • Outer Dia Tolerance -0.0003" to 0"
  • Width 0.196"
  • Width Tolerance -0.005" to 0"
  • Ball Dia 0.09370"
  • Ring Material Chrome Steel
  • Ball Material Chrome Steel
  • Cage Material Stainless Steel
  • Dynamic Radial Load 283 lbf
  • Static Radial Load 112 lbf
  • Max Speed 38000 rpm
  • Temperature Range -86 to 230 °F
  • Lubrication Required
  • RoHS Compliant
  • REACH Compliant
  • Weight 5.08 g
  • Price（$） 0.855
Inch Size Miniature Ball Bearings R3A dimension drawing
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Features

How Does R3A Bearing Reduce Friction?

R3A Bearing features chrome steel rings and balls, designed to minimise friction during operation.
Its precision construction ensures smooth radial load handling, with a dynamic load capacity of 283 lbf.

The stainless steel cage maintains ball alignment, reducing wear and enhancing performance.
With a maximum speed of 38,000 rpm, R3A Bearing is ideal for high-speed applications.

Its ABEC1 tolerance class guarantees consistent quality and reliable operation.
The radial clearance range of 0.00008″ to 0.0005″ ensures optimal performance in various conditions.

Application

Where Is R3A Bearing Used?
R3A Bearing is commonly used in small electric motors and hobbyist projects due to its compact size and reliable performance. Its inch sizing makes it a good fit for applications where metric bearings aren’t suitable.

In automation systems, R3A Bearing works well in lightweight robotic arms and 3D printers, where smooth rotation is essential. The open design allows for easy lubrication, extending its service life in continuous operations.

For consumer electronics like cooling fans or small appliances, R3A Bearing’s chrome steel construction ensures quiet and efficient operation. Its lightweight design also helps reduce overall device weight without compromising durability.

Medical devices such as dental tools or lab equipment benefit from R3A Bearing’s precision and low friction. The stainless steel cage adds corrosion resistance, making it suitable for environments requiring frequent cleaning.

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