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What are the General Dimensional Tolerances of NdFeB Magnets and SmCo Magnets?
What are the General Dimensional Tolerances of NdFeB Magnets and SmCo Magnets?
| Block | |||
| Dimension range(mm) | Plane view(mm) | Parallelism(mm) | Perpendicularity(mm) |
| 0.5≤L≤10 | +/-0.03 | +/-0.03 | 0.3 degree for adjacent sides |
| 10≤L≤50 | +/-0.03 | +/-0.05 | |
| L＞50 | +/-0.03 | +/-0.1 | |
| Disc | |||
| Dimension range(mm) | Cylindricity(mm) | Tolerance(mm) | Parallelism(mm) |
| 1≤D≤5 | +/-0.02 | +/-0.02 | +/-0.02 |
| 5≤D≤25 | +/-0.03 | +/-0.05 | +/-0.05 |
| 25≤D≤50 | +/-0.05 | +/-0.05 | +/-0.05 |
| D＞50 | +/-0.05 | +/-0.1 | +/-0.1 |
| Ring | |||
| Dimension range(mm) | Cylindricity(mm) | Tolerance(mm) | Parallelism(mm) |
| 1≤D≤3 | +/-0.02 | +/-0.02 | +/-0.02 |
| 3≤D≤5 | +/-0.04 | +/-0.03 | +/-0.05 |
| 5≤D≤15 | +/-0.05 | +/-0.05 | +/-0.03 |
| D＞15 | +/-0.1 | +/-0.05 | +/-0.1 |
| Segment | ||
| Item | Dimension range(mm) | Tolerance(mm) |
| Thickness | T≤10 | +/-0.04 |
| 10＜T≤25 | +/-0.05 | |
| Length | L≤10 | +/-0.03 |
| 10＜L≤25 | +/-0.03 | |
| 25＜L≤63 | +/-0.04 | |
| L＞63 | +/-0.06 | |
| Chordal Length | W＜63 | +/-0.05 |
| W＞63 | +/-0.06 | |