Hi all

I am trying to machine a spur gear, 20 deg, module 2...
Gear 1 with 35 teeth
Gear 2 with 85 teeth.

The sales person for the inserts says that the gears will have different tooth profiles because of the 2 different Diameters and number of teeth. .
As far as I know, there is no difference in tooth profile for the same module... Can anyone please confirm this?

Feels like he is trying to make sales...

Thanks
Clauds