Table 2

showing the different configurations and fault severities of the double stage reduction gearbox.

Gears Bearings Shafts



32 teeth 96 teeth 48 teeth 80 teeth Input shaft: input side Idler shaft: input side Output shaft: input side Input shaft: output side Idler shaft: output side Output shaft: output side Input Output
Spur 1–(healthy case) Good Good Good Good Good Good Good Good Good Good Good Good
Spur 2–(chipped tooth case) Chipped Good Eccentric Good Good Good Good Good Good Good Good Good
Spur 4–(broken tooth case) Good Good Eccentric Broken Ball Good Good Good Good Good Good Good
Gears Bearings Shafts


16 teeth 48 teeth 24 teeth 40 teeth Input shaft: input side Idler shaft: input side Output shaft: input side Input shaft: output side Idler shaft: output side Output shaft: output side Input Output
Helical 1–(healthy case) Good Good Good Good Good Good Good Good Good Good Good Good
Helical 2–(chipped tooth case) Good Good Chipped Good Good Good Good Good Good Good Good Good
Helical 5–(broken tooth case) Good Good Broken Good Good Good Good Good Inner Good Good Good

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