verification gears - problem -

[cimece]

Hello, everyone. I don't know if this is the right section, but I ask you a question.
I have a pinion with z=20, a z=74. The material is 42crmo4 (hb=240-285; rotation=800-950 n/mm^2; yield=550 n/mm^2).
the power to the pinion is 79 kw.
n1=47,55 rpm; n2=12,85 rpm
working hours 3000.
by checking both pressure and bending..tale transmission is not verified.
theoretically teeth should not hold. At least according to my calculations, but actually this gear has been realized and you want to know how many working hours you can do.
thank you all in advance!

 

[meccanicamg]

post doppio!!!

 

[tortellino]

theoretically teeth should not hold. At least according to my calculations.

Right.
need a module that is at least 13 (with lambda=15).

but in reality this gear has been realized and you want to know how many working hours it can carry out.
thank you all in advance!

ah, boh.
Go ahead and know you.
In fact you are hiding an important data, that is, the width of the toothed band (the lambda).

if lambda=15 will hold for 40 hours.
if it is lower (lambda=10) will hold 10 hours.