TEETH NUMBER?

[bk33]

thankyou very much (Reb,Hatch,sack ..all)for your answers it was very helpfull
i have another doubts as im monitoring this gear box i have the follwing data
400/800 HP

450/900 RPM INPUT
20/40 RPM OUTPUT
22:1 REDUCTION
is there a way of finding the teeth number on each gear?
i have data results (FFT) and i dont want to interpret it before getting the right input
any help would be very much apreciated
thankyou.

 

[Philm]

Depending on the condition of the gearbox, the FFT should be able to give you the number of teeth. A good gearbox will have a clearly defined peak at the N times run speed freq, where N is the number of teeth.