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Spindle crash – bearing damages detected by vibration tests

Maier W., Kimmelmann M.

Journal of Machine Engineering

2017

Vol. 17, No. 1

46--56

This paper presents experiments regarding the collision of a main spindle with a fixed machine body, i.e. a machine crash. Using experimental tests, it is shown how a machine crash affects the main spindle and its components. After the crash test under laboratory conditions, damages in the form of constrictions and transverse grooves in the bearing rings of the hybrid bearings are detected with roundness tests. Focused on the effects of a crash on high-speed bearings, vibration analyses of the motor spindle are carried out before and after the spindle crash. This paper presents how experimental order tracking analysis and roundness tests can be used to draw conclusions about the spindles’ state, especially about bearing damages caused by the collision.