Metric Size Standard Miniature Ball Bearings
Metric size standard miniature ball bearings are small rolling-element bearings measured in metric units, widely used in high-tech applications such as medical devices, robotics, and aerospace.
Optimized for Miniature Applications
Specifically designed as “miniature”, these ball bearings feature extremely small size (bore diameter, outer diameter, width) and use miniature balls as rolling elements.
This allows engineers to incorporate high-efficiency rolling motion into extremely space-constrained devices where every millimetre counts.
If you’re designing small robots, medical tools, or intricate instruments, these small bearings provide the necessary function in the smallest possible package.
Good High-Speed Performance
Benefits to the simple geometry shape and low friction characteristics, metric size standard miniature ball bearings allow them to operate effectively at relatively high speeds for their size.
Their precision manufacturing ensures smooth running, minimising vibration and heat. This makes them suitable for dynamic applications like miniature fans, dental drills, or other small, fast-rotating mechanisms.
Choose these for reliable performance when speed matters in your small design.
Standard Metric Sizes for Interchangeability
Metric size standard miniature ball bearings strictly follow the metric units (mm) to be designed and marked. Different with metric bearings, inch size bearings are also designed and marked by inch units (inch).
Finding the right size is very simple because these bearings adhere to standard metric bearing sizes. This standardisation (following ISO norms) ensures easy selection based on common bearing size numbering and guarantees interchangeability between different manufacturers or batches.
You can easily consult a bearing size chart or our product filters to find the precise metric dimensions (bore, outer diameter, width) needed for your application.
FREQUENTLY ASKED QUESTIONS
How do I identify a specific metric miniature ball bearing?
Metric miniature ball bearings often use numerical numbers (e.g., 608, 6800) or codes like MR series (e.g., MR105).
The part number typically indicates the series and bore size:
- Bores＜10mm, the last digits in the model directly indicate the size in millimetres (e.g., model 684 has a 4mm bore);
- Bores≥10mm, the standard code rule "code × 5" applies (e.g., "00" in model 6200 corresponds to a 10mm bore).
What are the typical outer diameter bearing dimensions for metric miniature types?
While varying, "miniature" often refers to ball bearing types with outer diameters (OD) below 9mm or 10mm, though some definitions extend slightly larger.
Are metric tiny ball bearings available sealed or shielded?
Yes, many metric size standard miniature ball bearings come in Open, Shielded (ZZ), or Sealed (2RS) versions to protect against contamination.
How long will it take to ship after the payment?
We have sufficient inventory. Most orders will be shipped within 10 days or less. After the order is dispatched, you can track the logistics information at any time until the goods are signed for.