Bearing Data Center Seeded Fault Test
Data
1.Welcome/Overview
Welcome to the Case Western Reserve University Bearing Data Center Website.
This website provides access to ball bearing test data for normal and faulty bearings.
Experiments were conducted using a 2 hp Reliance Electric motor, and acceleration data was
measured at locations near to and remote from the motor bearings. These web pages are unique
in that the actual test conditions of the motor as well as the bearing fault status have been carefully
documented for each experiment.
Motor bearings were seeded with faults using electro-discharge machining (EDM). Faults
ranging from 0.007 inches in diameter to 0.040 inches in diameter were introduced separately at
the inner raceway, rolling element (i.e. ball) and outer raceway. Faulted bearings were reinstalled
into the test motor and vibration data was recorded for motor loads of 0 to 3 horsepower (motor
speeds of 1797 to 1720 RPM).
2.Project History
Experiments are often required in order to validate new technologies, theories and techniques.
These motor bearing experiments were initiated in order to characterize the performance of IQ
PreAlert, a motor bearing condition assessment system developed at Rockwell. From the time of
this original impetus, the experimental program has expanded to provide a motor performance
database which can be used to validate and/or improve a host of motor condition assessment
techniques. Some projects which have recently or are currently making use of this database
include: Winsnode condition assessment technology, model based diagnostic techniques, and
motor speed determination algorithms.
