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Highly precise and reliable mechanical components designed for environments with high speed, low noise, and light loads. Widely used in model-making, medical devices, precision instruments, and more. These tiny bearings play a crucial role in driving forward modern industry and technology, becoming an indispensable part of various mechanical systems.
Miniature bearings are specialized and designed for high precision, high-speed, light-load, and space-restricted applications. Key specifications include:
- Inner Diameter (ID): Typically measured in millimeters (mm) and ranging from 1mm to 10mm.
- Outer Diameter (OD): Also measured in millimeters (mm), generally slightly larger than the inner diameter.
- Width (W): The bearing's width, also measured in millimeters (mm).
- Ball Diameter: Diameter of the internal balls, measured in millimeters (mm).
- Material: Miniature bearings are usually crafted from materials like GCr15 or stainless steel.
Miniature Bearing Size Chart |
||||
|---|---|---|---|---|
|
Bearing No. |
Bearing No.(NMB) |
Bore(d)(mm) |
Outer(D)(mm) |
Width(B)(mm) |
| 681 | L-310 | 1 | 3 | 1 |
| L-310w51 | L-310w51 | 1 | 3 | 1.5 |
| R-412 | R-412 | 1.2 | 4 | 1.8 |
| 601X | R-615 | 1.5 | 6 | 2.5 |
| 681X | L-415 | 1.5 | 4 | 1.2 |
| 691X | L-515 | 1.5 | 5 | 2 |
| 602 | R-720 | 2 | 7 | 2.8 |
| 672 | - | 2 | 4 | 1.2 |
| 682 | L-520 | 2 | 5 | 1.5 |
| 692 | R-620 | 2 | 6 | 2.3 |
| 676 | L-1060 | 6 | 10 | 2.5 |
| 686 | L-1360 | 6 | 13 | 3.5 |
| 696 | R-1560 | 6 | 15 | 5 |
| 607 | R-1970 | 7 | 19 | 6 |
| 608ZZ | R-2280zz | 8 | 22 | 7 |
| 628 | R-2480 | 8 | 24 | 8 |
| 638 | R-2880 | 8 | 28 | 9 |
| 678 | L-1280 | 8 | 12 | 2.5 |
| 688 2RS | 6882RS | 8 | 16 | 5 |
| 688ZZ | L-1680zz | 8 | 16 | 5 |
| 607 2RS | 6072RS | 7 | 19 | 6 |
Miniature Bearing Size Chart：Products 
Further reading:
Exploring Miniature Bearings in Depth: Uncovering the Features and Applications of Small Bearings
Discover more about the features and applications of various bearings.
Click here to explore more articles and find the perfect bearing for your project.
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