ABMA ISO 15242-3:2012 pdf free

ABMA ISO 15242-3:2012 pdf free.Rolling bearings – Measuring methods for vibration
Detection of peaks or spikes in the time domain velocity signal, usually due to surface defects and/or contamination in the test bearing, may be considered as a supplementary option by agreement between the manufacturer and the customer. Various evaluation methods exist depending on the bearing type and the application.
Double-row radial spherical and tapered roller bearings shall be tested with the axial load applied from one side of the outer ring and the test repeated with the axial load on the other side of the outer ring. Single-row radial tapered roller bearings shall be tested in their axial load acceptance direction only.
For diagnostic purposes, performing multiple measurements with the outer ring in different angular positions relative to the pick-up is appropriate.
For acceptance of the bearing, the highest vibration reading for the appropriate frequency range shall be within the limits mutually agreed between the manufacturer and the customer.
Prelubricated (greased, oiled or solid lubricated) bearings, including sealed and shielded types, shall be tested in the as-delivered condition.
NOTE Some greases, oils and solid lubricants increase or decrease bearing vibration levels in comparison with the reference conditions in 6.1.2 and 6.1.3.
The following reference condition procedures (6.1.2 and 6.1.3) normally apply for bearings that are not prelubricated. However, they may also be used in cases of dispute regarding the source of unacceptable vibration levels.
The spindle (including the mandrel) used to hold and drive the bearing inner ring shall be so designed and constructed that, except for transmittal of rotary motion, it represents essentially a rigid reference system for the inner ring axis. The transmission of vibration between the spindle/mandrel arrangement and the bearing inner ring in the frequency band used shall be negligible by comparison to the velocities measured (in cases of dispute, precise values shall be agreed upon between the manufacturer and the customer).ABMA ISO 15242-3 pdf free download.