Machine tool spindles. Evaluation of spindle vibrations by measurements on non-rotating parts - Direct-driven spindles and belt-driven spindles with rolling element bearings operating at speeds between 600 r/min and 30 000 r/min1 Scope This document provides information on how to assess the severity of machine tool spindle vibrations measured on the spindle housing. It gives specific guidance for assessing the severity of vibration measured on the spindle housing at customer sites or at the machine tool manufacturers test facilities. Its vibration criteria apply to direct driven spindles and belt driven spindles intended for stationary machine tools with nominal operating

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