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Machine tool spindles — Evaluation of spindle vibrations by measurements on non-rotating parts — Part 2: Direct-driven spindles and belt-driven spindles with rolling element bearings operating at speeds between 600 r/min and 30 000 r/min
Its vibration criteria apply to direct-driven spindles and belt-driven spindles intended for stationary machine tools with nominal operating speeds between 600 r/min and 30 000 r/min.
It is applicable to those spindles of the rolling element bearing types only, to spindles assembled on metal cutting machine tools, and for testing, periodic verification, and continuous monitoring.
It does not address
- geometrical accuracy of axes of rotation (see ISO 230‑7),
- unacceptable cutting performance with regards to surface finish and accuracy,
- vibration severity issues of machine tool spindles operating at speeds below 600 r/min or exceeding 30 000 r/min (due to lack of supporting vibration data and limitations in many vibration measurement instruments), or
- frequency domain analyses such as fast Fourier transform (FFT) analyses, envelope analyses or other similar techniques.
Annex A presents an introduction to alternative bearing condition assessment techniques.
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