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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
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