Open Access
Table 4.
Natural frequencies.
| Natural frequency (Hz) |
||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Begening | 206 | 244 | 311 | 378 |
| End | 252 | 288 | 355 | 441 |
| The spindle speeds which correspond to natural frequencies (rpm) | ||||
| 1 | 2 | 3 | 4 | |
| Begening | 3090 | 3660 | 4665 | 5670 |
| End | 3780 | 4320 | 5325 | 6615 |
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