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Metric Size Standard Miniature Ball Bearings MR93

Metric Size Standard Miniature Ball Bearings MR93

The MR93 is a compact miniature ball bearing with a 3mm bore and 9mm outer diameter, crafted from durable chrome steel. It handles radial loads up to 109 lbf and spins smoothly at speeds up to 56,000 RPM.

Its open design allows for easy lubrication, while the stainless steel cage ensures reliable performance. The bearing operates well in temperatures from -30°C to 110°C.

With a lightweight build of just 0.75g, it’s ideal for small applications like precision instruments or hobbyist projects. Compliant with RoHS and REACH standards, it’s a safe and practical choice.

The ABEC1 tolerance and MC3 radial clearance make it suitable for general-purpose use where moderate precision is needed. Its simple design ensures easy installation and maintenance.

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Product Parameters

  • Part Number MR93
  • Brand TFL
  • Interchangeable EZO
  • Bore Dia 3 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
  • Ball Qty 6
  • Ball Dia 1.5880 mm
  • Radial Clearance 0.002mm to 0.013mm
  • Seal Type Open
  • 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
  • Dynamic Radial Load 109 lbf
  • Static Radial Load 34 lbf
  • Temperature Range -30° to 110 °C
  • Lubrication Required
  • RoHS Compliant
  • REACH Compliant
  • Max Speed 56000 rpm
  • Weight 0.75 g
  • Price（$） 1.035
Metric Size Standard Miniature Ball Bearings MR93 dimension drawing
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Features

Performance Features of MR93 Bearing

MR93 Bearing is crafted with chrome steel rings and balls, offering reliable radial load support.
Its dynamic radial load capacity of 109 lbf ensures steady performance in compact applications.

The stainless steel cage maintains ball alignment, reducing friction and extending operational life.
With a maximum speed of 56,000 rpm, it delivers efficiency for high-speed miniature devices.

MR93 Bearing operates smoothly in temperatures from -30° to 110°C, adapting to various conditions.
Its open design simplifies lubrication, ensuring consistent performance with minimal maintenance.

Application

Common Applications of MR93 Bearing
MR93 Bearing is widely used in small electric motors, such as those found in drones or RC cars, thanks to its compact 3mm bore and lightweight design. The open seal allows for easy lubrication, ensuring smooth rotation at high speeds.

Industrial Uses of MR93 Bearing
In precision instruments like micrometers or gauges, MR93 Bearing provides reliable radial load support with minimal friction. Its chrome steel construction ensures durability even in demanding measurement tools.

Where Is MR93 Bearing Used?
You’ll often spot MR93 Bearing in office equipment like printers or scanners, where its small size and quiet operation are ideal. The ABEC1 tolerance class makes it suitable for applications needing consistent performance.

Built for Versatility: MR93 Bearing
MR93 Bearing works well in hobbyist projects, from model trains to DIY gadgets, due to its 9mm outer diameter and easy installation. The stainless steel cage adds corrosion resistance for longer life.

Automotive vs Aerospace: Applications of MR93 Bearing
In automotive dash instruments, MR93 Bearing ensures precise needle movement, while in lightweight aerospace components, its 0.75g weight helps reduce overall system mass. Both benefit from its high-speed capability.

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