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0.3mm Miniature Bearing Balls
| Parameter | Value | Unit |
|---|---|---|
| Nominal Diameter | 0.3000 | mm |
| Diameter Tolerance (G10/G25) | ±0.001 / ±0.002 | mmNTN Global |
| Sphericity (G10 Max) | 0.00025 | mmNTN Global |
| Surface Roughness Ra (Max) | 0.020 | μmNTN Global |
| Common Materials | GCr15, AISI 440C, 316L, Tungsten Carbide | — |
| Hardness (440C) | 60–62 | HRC |
| Precision Grades | G10, G25, G100, G500 | — |
| Standard | ISO 3290, JIS B 1501 | — |
| Weight (per 10,000 pcs, GCr15) | ~0.0011 | kg |
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