Bearing Defect Calculator

This program calculates the four basic bearing defect frequencies according to the bearing design and the machine running speed. These defect frequencies can be used to diagnose early sign of bearing failures in a machine by matching these signatures with the peaks in the vibration frequency (FFT) plot from the machine.
The user can also use the harmonic plot feature in this program to determine the sampling frequency so that the user can observe the desired number of harmonics of the defect frequencies in the FFT plot.

User has the option to save the bearing design parameters and the calculated defect frequencies in the Android device local database according to the bearing manufacturer and model which can then be recalled for future use without having network connection or re-entering the bearing design parameters.

The user can export/import database to/from cloud storage for archiving and/or sharing. The export/import feature has been tested with Dropbox and Google Drive. The user must have an account with the target cloud storage provider and also installed the mobile apps for the cloud storage to use this feature. The name of the exported database file is always BearingDefectExport.xml. To avoid overwriting an existing database file, always rename the existing file first before exporting a new file. There is no restriction on the import database file name. The imported bearing data are alway appended to the bearing data in the local database. The user has the option to either ignore or update in case there are duplicated bearings in the import file.

This software has been tested on the following devices.
Smart Phones: HTC EVO Android V2.3.5, HTC One Android V4.1.2, SAMSUNG Galaxy S3 Android V4.0.4
Tablets: Kindle Fire, Idea Android V4.0.4, Nexus 7 Android V4.2.2